ExPhysiology

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Pain Equals Potassium

By Brian MacKenzie

Video Article

Oh the burn!

At some point during Karen, your quads start to tingle with a certain familiar sensation that can only be described as “burning.” As you work your way toward your 150th toss of the Dynamax ball, the feeling gets worse and worse until you heave the final ball to the wall.

We all feel lactic acid building up during a workout. Or do we?

It turns out the burning sensation actually comes from the accumulation of potassium… Continue Reading

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The Ultimate Painkiller?

By Dr. Steven M. Platek

In ExPhysiology, Rest Day/Theory

June 19, 2010

PDF Article

Does suffering in a group make it easier? Dr. Steven M. Platek believes the camaraderie of CrossFit can get you through the nastiest WOD.

What does CrossFit have to do with pain?

Quite fascinatingly, our “feeling” of pain in the physical is tightly and neurologically linked to our feeling pain in the social realm (being excluded, ostracized, etc.). The kid who does not get picked for dodgeball experiences a sense of pain very similar… Continue Reading

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Your Form Sucks

By Dr. John Zimmer

In ExPhysiology, Medical/Injuries

May 22, 2010

PDF Article

Poor posture can create poor results and cause injuries. Dr. John Zimmer explains how to improve posture for best performance and safety.

“Your form sucks.”

This harsh statement is something I politely announce on a regular basis, along with telling the athlete he or she is pulling with the arms or has muted hip function, and it usually comes in response to myriad questions that are either injury- or performance-related.

“Why does my… Continue Reading

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Getting Some Leverage

By Dr. Lon Kilgore

In ExPhysiology, Reference

May 01, 2010

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Dr. Lon Kilgore says paying attention to simple mechanics can help great coaches improve technique and get better results in the CrossFit box.

The human body is a complex system of levers that enables us to perform everything from very basic to extremely complex movements. Individually, levers are simple machines, and we can think of the body as a collection of machines.

During exercises, we want to use the levers… Continue Reading

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A Day in the Life of a Starr

By Sevan Matossian

In Coaching, ExPhysiology, HD Videos

April 11, 2010

Video Article

Nothing is ordinary about a day in the life of Kelly Starrett. Whether he’s helping fine-tune one of the world’s fittest men or running an outdoor-only CrossFit gym in San Francisco, Starrett is one interesting guy with an incredible depth of knowledge about human movement.

Starrett’s doctorate in physical therapy lends him credibility, but it’s his deep background in training that keeps people returning to his gym and attending his Mobility and Recovery… Continue Reading

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If the Shoe Fits …

By Richard Grimes

In Equipment, ExPhysiology

April 09, 2010

PDF Article

Athletes have a host of footwear choices for WODs. Richard Grimes surveys experts and top athletes to determine what their advice means in a GPP fitness program.

I remember the first time I thought about the importance of shoes in CrossFit.

I was in my garage looking for my shoes so that I could work out. I had been looking for 20 minutes already and I was itching to get started on my box jumps. When… Continue Reading

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In ExPhysiology, Nutrition, Reference, Videos

April 04, 2010

Video Article

On March 12, 2010, Coach Greg Glassman and a small crew visited Dr. Scott Connelly in the Los Angeles offices of Progenex. The intent was to tap into Dr. Connelly’s vast knowledge of metabolism, particularly as it relates to long-term fitness and health.

The result was over 90 minutes of education about the relationships among glucose, insulin, ATP, protein, body weight and health. This is a dense, fast-moving presentation worthy of multiple viewings. Topics include:

* Why a… Continue Reading

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Moved to Mate?

By Dr. Steven M. Platek

In ExPhysiology, Rest Day/Theory

March 25, 2010

PDF Article

Dr. Steven M. Platek presents a scientific argument in support of the idea that naturally designed movements produce naturally attractive physiques.

Evolution has favored certain movements in different animals because those behaviors have produced two essential outcomes for possessors of the requisite species-specific movements: survival and reproduction—more specifically, being selected as a mating partner.

For example, the kangaroo and the rabbit (or hare) hop. Big cats (lions… Continue Reading

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