Category Archives: science

5 Physiological Fun Facts for Yoga Teachers and Practitioners

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5.) FACT: People who lose weight often still feel heavy and commonly maintain the body language and movement characteristic of an overweight person.

REASON: A conflict exists between the body schema (which is largely up-to-date on the current state of the body, but is largely unconscious) and body image (which relates to how we feel about our bodies, can lag behind the state of the body, and of which we are conscious.)

RELEVANCE: It may take unconventional activities to help a student realign his or her body schema and body image. e.g. Wobble boards have been shown to be effective.

REFERENCE: “The Body Has a Mind of Its Own” by Blakeslee and Blakeslee

 

4.) FACT: The busiest skeletal muscles in the body are the extraocular muscles (i.e. more than 100,000 moves per day.)

REASON: We don’t see over a broad area as clearly as we think we do. The illusion that we can is created by rapid saccades by which the eye is constantly moving to take in sights from the point at which our sight is best. You can prove this to yourself by fixing your gaze forward, and then–from the side–draw a playing card at random so the face is towards your cheek while holding the card out to one’s side at shoulder height, and then–eyes still fixed forward–gradually move it in an arc at arm’s length towards one’s center-line until you can make out which card it is. You might think you’d be able to make it out at say a 30-degree angle from center-line, but you’ll find it’s almost directly in front of your eye when you can make it out. If if isn’t: a.) your eyes made a cheating saccade so quickly you didn’t notice it or, b.) you are an android and have eyes (and nervous system interface) that aren’t constructed on the same principles as the human system of vision.

RELEVANCE: One may want to brush up on eye yoga. Yes, there is such a thing.

REFERENCE: There’s a section on exercises for the eyes in Swami Saraswati’s “Asana Pranayama Mudra Bandha” (commonly called APMB.)

 

3.) FACT: The gut has its own nervous system (i.e. the enteric nervous system) that can interact with our body’s nervous system, and increasing evidence suggests that it’s not always mental stress that causes stomach aches, but sometimes problems in the gut result in mental / emotional turmoil.

REASON: There’s a lot that remains unknown at the moment, but a lot of research is going on in this area. It seems reasonable to guess that there’s probably an evolutionary advantage for the digestive tract to be able to express its dissatisfaction in a way that changes behavior (and emotions are all about behavior change.)

RELEVANCE: Unexplained depression or emotional outbursts may have unexpected origins.

REFERENCE: I can highly recommend “Gut” by Giulia Enders, but I’ve also heard great things about the more recent “I Contain Multitudes” by Ed Young, though I haven’t gotten around to reading it yet myself.

 

2.) FACT: The problems that can arise due to hyperventilation aren’t about oxygen levels, they are about too little carbon dioxide.

REASON: Lack of carbon dioxide can cause arteries and arterioles of the brain and spinal cord to constrict.

RELEVANCE: Introduce kapalbhati and bhastrika with caution.

REFERENCE: H. David Coulter’s “Anatomy of Hatha Yoga” chapter on breathing (Ch. 2) deals with the physiology of breathing in an excellent fashion.

 

1.) There are oh-so-many more than five senses in the human body. Within the realm of “felt sensation” alone there’s not only touch (one of the five senses we usually think of), but also: thermoception (sense of temperature), nociception (sensation of pain), proprioception (sense of the location and motion of our various body parts, and balance (which relies on vision and proprioception but also vestibular sensation.)

REASON: Without these sensations we couldn’t function as we do. I don’t have to tell experienced meditators how difficult it can be to simply stand up or walk when proprioception is dampened by the pins-and-needles from sitting cross-legged such that one doesn’t notice one’s drooping foot.

RELEVANCE: At some point one should begin to practice relying on proprioception more and visual confirmation less. (Proper drishti–focal points–rarely allow one to visually confirm one’s position.)

REFERENCE: Besides the book mentioned in #5, check out David J. Linden’s “Touch.” I’ve also begun reading a Harvard Medical School Guide entitled “Better Balance” that gives insight into how to improve the sense of balance–particularly if one serves senior citizen students.

 

POEM: Tiny Window

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That speck of sand
that you can barely see
is a planet to the particle
that sits on either side of it,

awaiting a wave form collapse.



Your mind can’t roam out
to the tip of the spiral arm–
let alone to the leading edge
of space as it accelerates into…



5 billion years or 5,000,
it’s all the same to you.



And anything less than
a microsecond isn’t worth
being called time–

[though it’s half a life time for muonium.]



Such a tiny window
through which to seek
the sum of all knowledge.

BOOK REVIEW: Doors of Perception & Heaven and Hell by Aldous Huxley

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The Doors of Perception and Heaven and HellThe Doors of Perception and Heaven and Hell by Aldous Huxley
My rating: 5 of 5 stars

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The two essays collected in this thin volume recount Aldous Huxley’s experience taking mescalin (a psychedelic drug / hallucinogen derived from a cactus root) in the 1950’s, and the insights derived from that experimentation. The book contains descriptions of what Huxley observed under the influence, such as the hallucinations of “sacred geometry” that are common among those consuming hallucinogens. However, much of these essays are about how what he witnessed mirrors art and the text of mystical religions. Huxley provides a steady diet of food-for-thought on these topics. It is when Huxley relates the psychedelic experience to the mystical, religious, and artistic experience that I found this volume to be the most intriguing. “The Doors of Perception” is a mix of description and discussion of these linkages. “Heaven & Hell” delves much more deeply into said linkages, and I was blown away by some of the ideas in the latter essay. There is also a bit of discussion of the commonalities between schizophrenia and psychedelic experience.

Huxley devotes some space in both essays to discussing the science of these experiences, but I don’t see those parts as the strength of the volume. While Huxley was a scientifically minded fellow, his reporting on science errors on some of the grand scale issues (e.g. memory, which is far more fallible than was thought in his day.) (Specific [small-scale issue] findings are probably accurate.) The thing is, Huxley was also a mystic and he viewed biology as a “reducing valve” that mitigated our experience of consciousness—a grand field existing wholly beyond the nervous system, such that our experience of it was hemmed in by biology—rather than being created by it. This isn’t particularly a criticism. For one thing, when one beholds the bold sensory experiences that Huxley witnessed and contrasts them to the visualization of everyday consciousness, it’s hard not to believe that one is on a plane entirely outside the bonds of biology. While I’ve never done psychedelic drugs, my limited experience with the more-real-than-real world of lucid dreaming makes me sympathetic to this long-held and widely held belief. Additionally, neuroscience was still in it’s infancy during Huxley’s time. [It may still be in its infancy, but a great deal has been learned—particularly since the technology of the 1990’s—that points to biology being the source of many of these experiences that seem amaterial.]

The two essays are each short. “The Doors of Perception” is about 50 pages, and “Heaven & Hell” is about 40. Even with the front matter and appendices, the book comes in at only a little over 120 pages.

There are no graphics in this volume, nor is it annotated—except for in-text references and a few footnotes. With respect to front matter, there is a Forward by J.G. Ballard and an Introduction / bio-sketch of Huxley by David Bradshaw. There are also a series of appendices that report on various topics related to mystical / psychedelic experiences such as the effects of CO2, strobe lights, and starvation, as well as the relationship to lighting, works of art, and mental illness.

If one is interested in alternate states of consciousness, I’d highly recommend this book. Huxley’s ability to capture his experience vividly and his thought-provoking suggestions about the experience make these essays worth the read.

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BOOK REVIEW: Lab Girl by Hope Jahren

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Lab GirlLab Girl by Hope Jahren
My rating: 5 of 5 stars

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This book is in part the autobiography of a female scientist with a career in a field that is both male-dominated and in which basic science is the meat and potatoes—by which I mean a discipline with few of the commercial applications at which companies, foundations, venture capitalists, and governments are willing to throw millions. Interspersed into the autobiographical chapters are short essays on trees and the ways they survive, grow, and interact with each other and their environments. So it’s a mix of biography and pop science, and was one of the most well-received science-themed books of last year (2016.)

The book is arranged into three parts. The first 11 chapters are entitled “Roots & Leaves” and these cover Jahren’s path to becoming a scientist from her childhood in an unexpressive Scandinavian family in rural Minnesota, through her college job in a hospital lab, and onto her graduate education. Part II consists of 12 chapters that cover Jahren’s years as a junior faculty member, most of which takes place at (my alma mater and former employer) Georgia Tech. The title of this chapter, “Wood & Knots,” gives one some indication of where the author’s story sits in this part of her life. She experiences both growth and set-backs during her time in Atlanta. The last part, “Flowers & Fruit,” describes the period in which not only her professional life, but also her personal life begins to bear fruit. During these years she moved her lab to Johns Hopkins, got tenure, built a family, and eventually moved to Hawaii to work for the University of Hawaii.

Besides Jahren, the only other major character in the book is her side-kick Bill, who was an undergraduate where she did her doctorate in California. The two met when Jahren was the Teaching Assistant for a course that Bill took, and subsequently he followed her from lab to lab as her research assistant. Bill’s mix of workaholic diligence, nerdiness, dysfunction, and adroit sarcasm made him a sort of soulmate of science. Their strange, platonic relationship is at the heart of the book, and is in part what keeps the reader wondering and turning pages. Her dog, her husband, and her child are all secondary characters by comparison (perhaps not in her life but in the science-centric story she is telling) though her son becomes a central player near the book’s end. The other people are cameos by grad students and other faculty members.

Jahren’s use of language is skillful and at times poetically beautiful. There’s a great deal of humor in the book, much of which stems from the dialogue between her and Bill. While the parts of the books about trees didn’t wow me as much as Wohlleben’s “The Hidden Life of Trees,” that may be because I read his book first and, therefore, was clued into some of the fascinating arboreal secrets. That said, these botanical sketches are intriguing and readable. The only place that the book bogged down for me was in incessant complaints about the difficulty of keeping a lab funded. (And this is from a person who was paid from grant money—job perpetually at risk–at the same Institute where Jahren struggled. But now I’ve lived in India for the past four years so… first world problems, right?)

I’d recommend this book for readers generally. I think it may be particularly insightful for young women choosing a career in science, but the book shouldn’t be shunted into a parochial box. There are a number of elements that will keep one reading. For some it will be a fascination with the unexpectedly complex life of trees. For some, the tension of this life story may have a lot to do with the mental health issues that Jahren struggles with. These issues aren’t put front and center in the book, but there are points at which their impact is felt. A few will just be wondering what exactly is going on with her relationship with Bill.

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BOOK REVIEW: Anatomy of Hatha Yoga by H. David Coulter

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Anatomy of Hatha Yoga: A Manual for Students, Teachers, and PractitionersAnatomy of Hatha Yoga: A Manual for Students, Teachers, and Practitioners by H. David Coulter
My rating: 5 of 5 stars

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There are many books on anatomy for yoga, and I’ve read my share, but this is my favorite.

What did I like about it? First, Coulter examines the anatomy and physiology of breathing in some detail, and that’s an important topic that is overlooked by many others. A lot of yoga anatomy books stick exclusively to the musculo-skeletal system. Second, this book doesn’t mix science and pseudo-scientific mythology. Sometimes books shift from talking about arteries and veins to nadis and chakras in a manner that can be confusing and counterproductive. Third, the book discusses how postures can be safely varied for individuals with limits, as well as discussing the most advanced expression of postures for more flexible or skilled students.

What’s the catch? There must be a downside? Well the book is dense and it’s a challenging read. It’s not that the writer uses too many technical terms. That isn’t the case at all. In fact, Coulter is careful not only about using anatomical terms, but also avoids reliance on Sanskrit names as well. It’s just that there is a lot of material that one must read painstakingly while visualizing and–in some cases—tactically probing around one’s body (or someone else’s–if they’ll let you.) I don’t know that there’s much that could be done about this, given the desire to convey the material that the book does—and it’s valuable information. The book has a large number of graphics that mostly consist of anatomical drawings and photographs of the various versions of the postures. It’s possible that more graphics could have been used to reduce the amount of descriptive text, but—on the other hand—reading it slowly and carefully is a useful and productive exercise. And, if you’re not reading it for your RYT-500, you can take your time and read it section by section, as time permits, over the course of more than a year as I did.

The ten chapters of the book are mostly divided up by classes of posture (asana.) Chapter 1 is about “movement and posture” and provides the necessary background that one will need to understand the later chapters. Chapter 2 is on breathing–both the musculature involved and the physiology of it. The rest of the chapters are on core exercises, standing postures, back bends, forward bends, twists, headstands, shoulder-stands, and meditative postures, respectively.

The book has a glossary, a short bibliography, and two indexes (one by anatomical parts and the other by practices/postures.) I normally don’t bother to mention indexes, but in this case it’s useful to know because the book’s organization is by type of posture, and so it’s not always straight forward where various muscles or tissues are being covered.

As I say, I found this book to be tremendously informative. I recommend it for yoga teachers as well as intermediate / advanced practitioners.

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BOOK REVIEW: How Enlightenment Changes Your Brain by Andrew Newberg and Mark Waldman

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How Enlightenment Changes Your Brain: The New Science of TransformationHow Enlightenment Changes Your Brain: The New Science of Transformation by Andrew Newberg
My rating: 5 of 5 stars

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This book busted me over the head with some profound food for thought. I’d been skeptical of the notion of Enlightenment. [Note: the authors distinguish big-E Enlightenment as a permanent and substantial brain change, in contrast to the little-e enlightenment which is just a momentary epiphanies or insight—a number of which may precede the big-E Enlightenment.] It’s not that I disbelieved that some people had life-changing and / or perspective-changing experiences, but rather that such events represented permanent change. My skepticism was influenced by the many gurus who have been said to be Enlightened, but who behaved to all appearances like petty, materialistic douche-bags. It’s not that I couldn’t believe that these teachers achieved some momentary heightened state of consciousness during their youth, but—if they had—they clearly couldn’t maintain it under the pressure of being idolized. I’d, therefore, come to think that life is a perpetual struggle to try to be a better version of oneself, and backsliding can and will happen at any moment. This book, however, suggests there is a possibility for permanent brain changes. [Though Dalberg’s “Absolute power corrupts absolutely” seems to still apply.]

Andrew Newberg is a neuroscientist who has made a career out of conducting brain imaging studies of people engaged in various spiritual, religious, and meditative activities. His co-author is a psychologist, Mark Robert Waldman, who works on applying neuroscientific understanding to positive psychology. In this book, the two examine what Enlightenment is from a neuroscientific standpoint and then try to cull the common features across a population of cases of Enlightenment / enlightenment. Discovering the common elements of Enlightenment is no easy task. While it seems everybody is theoretically capable of achieving Enlightenment, it also seems that the experience is different for everybody and the collection of systems (religious, spiritual, and secular) by which it’s pursued is vast. However, the authors present a five-step outline by which readers can prime themselves to achieve Enlightenment, and it can be personalized depending upon one’s beliefs (or lack thereof—Enlightenment occurs among agnostics and atheists as well as religious practitioners) and background.

The book consists of 12 chapters divided among three parts. Part I (Ch. 1 to 5) lays the groundwork for readers to understand what Enlightenment is, how it feels, how it’s experienced between people with radically varying belief (and disbelief) structures, and it presents a model of human awareness that is crucial to the later discussion. Part II (Ch. 6 to 9) considers what happens in the brain during various practices by which individuals advance towards Enlightenment. Concepts like unity, surrender, and belief are explored in detail. Part III (Ch. 10 to 12) describes the process by which readers can pursue Enlightenment for themselves. If one is inclined to chart one’s own path, versus adopting an existing program, one has all the insight and tools to begin constructing one’s personal method by the time this section is complete.

The book has graphics as necessary (e.g. brain diagrams) that largely consist of line diagrams. There is an appendix that consolidates tools and resources, and the book is annotated by chapter.

I found this book to be both interesting and potentially beneficial to readers who take it beyond a popular science book and into the realm of self-help. The authors do a great job of navigating the waters between religion and science. Obviously, they are scientists and are agnostic about that which cannot be proven, but they don’t question other people’s beliefs and–if anything–error on the side of being open-minded. Still, I suspect that there will be religious types offended by the very notion that all humans are biologically primed to achieve this heightened state. It should be pointed out that the book could be supremely useful for such individuals because it points out the need to engage in exercises to challenge one’s most closely held beliefs. (Those with less mental flexibility and capacity for tolerance seem to be less likely to achieve Enlightenment.)

I’d recommend this book for anyone trying to figure out how to be the ultimate version of oneself.

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POEM: Sick of Being Bossed Around

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I’m sick and tired of Gravity

telling me where I should go.

Why must I have more entropy?

And approaching c I must slow?

I’m all for conservation,

but electrical charge and mass?

What authoritarian nation

could get such laws to pass?

BOOK REVIEW: The Way of the Iceman by Wim Hof and Koen De Jong

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The Way of The Iceman: How The Wim Hof Method Creates Radiant Longterm Health--Using The Science and Secrets of Breath Control, Cold-Training and CommitmentThe Way of The Iceman: How The Wim Hof Method Creates Radiant Longterm Health–Using The Science and Secrets of Breath Control, Cold-Training and Commitment by Wim Hof
My rating: 5 of 5 stars

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Wim Hof is often presented as a freak of nature. If you’re flipping through the science channels, you might see a segment that shows him subjecting himself to extremely cold temperatures with no ill effects. This book is an attempt by Hof, and co-author Koen De Jong, to counter the proposition that he’s some sort of mutant (or—worse–that his demonstrations are cons) by offering a method by which anyone can achieve the same feats. It should be noted that long before Hof and YouTube came on the scene, there were people [notably Taoist and Tibetan Buddhist monks] performing similar acts.

Hof’s method (called the “Wim Hof Method” or WHM herein and in this book) consists of three components: cold training, breath exercises, and commitment building. The book explores this three-legged stool from both the scientific and practical dimensions. There’s one chapter on each of these elements that describes what it does to the body and how it contributes to well-being, and later chapters both describe what scientific studies have found so far and outline the approach by which the reader can explore the WHM on their own.

There’s a lot of front matter in this book (two forwards, a prologue, and an introduction), but the book more-or-less consists of seven chapters. The first of these is a mini-bio of Hof. It describes a fascinating event in Hof’s youth in which he was exposed to cold, as well as his travels to India in an attempt to find a yoga teacher. [As is the case with most people who come to India seeking to find that quintessential guru—i.e. a half-naked, weather-beaten, and forehead paint-streaked classical guru—he found that he had to wade through a sea of charlatans and shysters while never finding the true masters who are likely hidden away in caves in the Himalayas. Note: this is not to say that one can’t find excellent yoga instruction in India but it’ll likely be by someone fully clothed and not someone smoking pot on a ghat in Varanasi.] This resulted in Hof taking an experimental approach in which he studied the effects of various activities on himself (and such experimentation is what he advocates for others as well.) It should be noted that Hof didn’t invent this method from scratch—e.g. the breath component is based on Tibetan Tummo meditation.

As mentioned, Chapters 2 through 4 explore the three components of the WHM, i.e. cold training, breath exercise, and commitment building, respectively. These chapters describe the science of how these three elements generally (as opposed to a later chapter that describes studies in more depth) act upon the body. The commitment section describes a number of arduous feats such as climbing Kilimanjaro in a T-shirt and shorts, but also describes the role of diet (with particular emphasis on the fast-5 diet which is similar to, but not precisely, what Hof came to practice organically.)

Chapter 5 dives more deeply into the science than does the preceding chapters, and focuses on the studies in which Hof has participated in his attempt to facilitate a better understanding of his method.

The penultimate chapter suggests what the WHM might do for people in various classes, including: healthy people, athletes, and people suffering from various physical and mental ailments. With respect to the latter, there is discussion of exemplary cases as well as the possible means by which the training might act.

The final chapter is a brief outline of how the WHM can be put into practice by readers. There is also a sample log by which practitioners can chart their experience.

There are a range of graphics including line diagrams and photographs. Most of the photographs are inspirational shots of Hof in action, but there are diagrams and other graphics used to convey scientific ideas. There’s a recommended reading page as well as a works cited page. Both lists are small and confined to a few key sources of information, with the latter being the more scholarly works. There is also a glossary that may prove handy for some readers.

This book is illuminating and many stand to benefit from it. I found the approach of the authors to be sound; it’s basically “see for yourself.” This book could easily have been a sales brochure, and in some ways it is, but the fact that it emphasizes the science and the suggestion that the reader try the practice lends credibility. I’d highly recommend this book for anyone who wants to expand and explore the limits of their capability.

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BOOK REVIEW: The Science of Breath by Swami Rama et. al.

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Science of BreathScience of Breath by Swami Rama
My rating: 4 of 5 stars

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This is an oldie, but a goody. The first edition came out in 1979, but as its intent is to provide an overview of the anatomy and physiology of breath for yoga practitioners, the fact that it doesn’t access the bleeding edge of respiratory science isn’t all that detrimental.

This short book consists of four chapters. Two chapters are by the famous yogi Swami Rama, and the other two are written by medical doctors. The first chapter is an introduction to breath from the yogic perspective. It both explains why it’s so important to understand and work with breath and introduces the mythic physiology (prana, nadi, chakra, etc.) that has historically been used to explain pranayama (breath exercises.)

The second chapter is written by Dr. Alan Hymes and it explains the mechanics of respiration. While Chapter 2 focuses on the anatomy of breathing, it begins with an explanation of cellular respiration to introduce the role of breath in powering muscles. There is a fine explanation of the operation of the diaphragm and the intercostal muscles in breathing.

Chapter 3 is written by Dr. Rudolph Ballentine, and it delves into the role of the nose and nasal cavities in respiration. Breathing through the nose is emphasized in both yoga and many other systems of breath training (e.g. the Buteyko and Wim Hof methods.) This is because the nasal cavities perform many useful functions such as moisturizing and warming air, capturing pollutants, and extract heating and moisture from exhaled breath. Besides exploring nasal anatomy and physiology, Dr. Ballentine describes jala neti shatkarma (nasal cleansing with salt water) and nadi shoudhana (alternate nostril breathing.)

The final chapter, written by Swami Rama, mostly describes various techniques of pranayama (breathing exercises) and related practices bandhas and mudras (locks and seals in which bodily parts are contracted or constricted.) However, the chapter begins with a mix of physiology and mythic physiology. That is, it explains some topics not addressed earlier–such as the interaction between the nervous and the cardiovascular systems as well as chakra.

My standing complaint about books that weave together science and pseudo-science is mitigated a bit herein. My problem with putting these ideas together is that it can be difficult for the reader to determine what concepts reflect reality and which offer models to help one visualize energy. However, except for the last chapter, this book does a good job of keeping these ideas separate. The chapters by the medical doctors present the science with minimal intrusion of unscientific concepts. Swami Rama does present science and mythology together, but not so much scrambled together in a confusing mish-mash.

Chapters 2 through 4 use a number of graphics to help present the material. In the middle chapters these largely consist of line drawings to convey the relevant anatomical features or physical actions. The last chapter adds photographs to demonstrate relevant postures. There is a page of recommended readings, but it’s more of an advertisement for other books put out by the Himalayan Institute than the recommendation of books on the science of breath.

I found this book to be educational. It packs a lot of useful information into a concise package and is readable to a layman. I’d recommend it for yoga practitioners and others who are engaged in breath work.

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BOOK REVIEW: Head in the Game by Brandon Sneed

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Head in the Game: The Mental Engineering of the World's Greatest AthletesHead in the Game: The Mental Engineering of the World’s Greatest Athletes by Brandon Sneed
My rating: 5 of 5 stars

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There are many factors that influence whether an athlete can reach an elite level. Physical factors such as VO2 max (maximum oxygen consumption) and musculature have long been at the fore in the minds of coaches and trainers, but they’ve never told the full story. There are athletes who have the muscles, lungs, and general physiology to dominate their sports who fall apart under pressure. One also sees the occasional athlete who is consistently good even though he seems puny by comparison to his peers. It used to be that mental performance was considered an endowed X-factor–you either had it or you didn’t. Coaches didn’t know how to coach for issues of the mind and often exacerbated problems with old school attitudes and approaches.

We’ve now entered a new era in which a bevy of techniques and technologies are being exploited to strengthen the mind and improve psychological deficiencies, just as gyms have always been used to build the body and combat physical deficiencies. These range from techniques of meditation and visualization that have been known to yogis and Buddhists for centuries to advanced technologies that have only become available in recent decades and which are constantly improving and being made obsolete. Sneed examines the gamut of these approaches as they are applied to improving performance in sports: from the meditative or therapeutic to the electronic or pharmacological. One no longer need give up on athletes who are great at their best, but who get the yips at the worst possible times. The performance of mediocre athletes can be improved and that of the best can be made more consistent.

Sneed has a unique qualification to write this book. He counts himself among the athletes who couldn’t reach his potential because of inconsistency rooted in psychological challenges. His willingness to be forthright about his own problems makes the book more engaging. His own stories are thrown into the mix with those of athletes from football, basketball, soccer, baseball, adventure sports, and mixed martial arts (MMA.)

The book’s 19 chapters are divided among four parts. The first part lays the groundwork, helping the reader understand the rudiments of how the brain works, doesn’t work, or works too hard for a competitor’s own good. A central theme is that the ability to analyze and train through the lens of neuroscience has removed some of the stigma that has always been attached to psychological issues in sports (not to mention the days when they were written off as weakness.) Much of the six chapters of Part I deal with assessment of the athlete’s baseline mental performance. The last chapter (Ch. 6) covers a range of topics that have been around a long time as they’ve been reevaluated through modern scientific research. These include religion, faith, superstition, meditation, visualization, and the immortal question of whether sex is good or bad for athletic performance.

The second part consists of five chapters taking on one fundamental truth: mind and body are not two disparate and independent entities. This section starts at the most logical point: breath. Practitioners of yoga (i.e. pranayama) and chi gong have known for centuries that breath can be used to influence one’s emotional state and level of mental clarity. Sneed evaluates the technology that is being used to help athletes master the same age-old lessons. Having laid the groundwork through breath, the section advances into biofeedback technology. There are two chapters in the book that deal with pharmacological approaches. One is in this section and it deals with legal (at least in some locales) substances such as caffeine, alcohol, nicotine, nootropics (alleged mind enhancing drugs), and marijuana. (The other is in the final part and it deals with hallucinogens.) There are also a couple of chapters on technologies used to produce or enhance desired mental states.

For most readers, the third part will be seen as the heart of the book. Having considered how to evaluate an athlete’s mental performance (Part I) and how to influence mind states by way of the body (Part II), this part explores the range of technologies that are used to exercise the mind in a manner analogous to working out the body. These technologies focus on a range of areas including improving the nervous system’s ability to take in information, process that information, and respond appropriately. Much of this part focuses on video games; albeit video games using state of the art virtual reality and which are customized to improvement of athletic performance. Some of the games are used to train general cognitive performance (e.g. Ch. 13) but others are specifically tailored to the game in question (i.e. Ch. 14.) Just as simulators are used in aviation, part of the advantage of these games is the ability to put players in progressively more challenging conditions.

The last part of the book was the most interesting to me, personally. [It’s also the part of the book that will be the most relevant and readable a few years down the road because it’s not as modern technology-centric as most of the book—especially Part III–is.] It’s entitled “The Spirit” and it explores X-factors to performance, but sans the assumption that these are endowments, but rather under the assumption they are trainable. The part has an important introduction that presents the research about how “soft” factors like gratitude play into outlook and performance. Then there are the Part’s three chapters. The first describes an experiment involving taking elite athletes into physically arduous conditions of the kind normally experienced by military special operations forces in survival training. The second tells the story of MMA fighter Kyle Kingsbury’s use of hallucinogenic substances (most intriguingly, ayahuasca, a powerful drug long used by Peruvian shamans.) Finally, the last chapter deals with sensory deprivation—a technology some will associate with the movie “Altered States” but which many athletes swear by.

The book has an extensive section on notations and sources organized by chapter. There are no graphics.

I enjoyed this book and found it to be informative. There are a number of books that explore the techniques and technologies of optimal mental performance, but this one develops a niche by focusing on the realm of sports and some of the technologies that are only available with the kind of deep-pockets seen in professional sports. The book is heavily weighted toward the technology part of the equation, which is both good and bad. If you’re reading it now (2017), it’s great because you’re getting an up-to-date discussion of the subject from the perspective of entities that are awash in money for tech. The downside is that this book won’t age well, at least not as well as it would if there was more emphasis on approaches that aren’t based on cutting-edge technology.

I’d recommend this book if you are interested in optimal human performance, and if you have an interest in sports, all the better.

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