ExPhysiology

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In ExPhysiology, Reference

July 01, 2007

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Athletes, coaches, and trainers familiar with CrossFit know that it works. However, I find that some are nonetheless hungry for more explanations of why it works.

The term "physiologic conditioning" refers to a planned program of exercise directed toward improving the functional capacity of a particular bodily system. There are four basic principles of physiologic conditioning that trainers and athletes must take into account:
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specificity
reversibility
individual… Continue Reading

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In ExPhysiology, Reference

July 01, 2007

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For some people, hearing the words "the most powerful human" conjures up images of a spandex-clad superhero oozing muscles and capable of incredible feats of strength and speed. Or maybe it makes you think of a 248px-pound fullback driving through a mass of bodies to the goal line. In any case, it evokes a figure who is strong and can move fast. And this is where we begin our… Continue Reading

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Why You Should Sprint Train

By Tony Leyland

In ExPhysiology, Reference, Running

May 01, 2007

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Last month I talked about rest periods during interval training and said I would discuss high-intensity sprint and peak power workouts further. One of the things I talked about is the need for relatively long rest periods during short-duration, peak-intensity work that lasts less than 10 to 15 seconds. I also noted that when it comes to sprint workouts that train short, maximal-effort running intervals, many… Continue Reading

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In ExPhysiology, Reference

April 01, 2007

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Whenever the Workout of the Day on CrossFit.com requires rest periods of unspecified duration between exercise bouts, there are always many questions about it on the comments page. This is understandable, as rest and recovery within a workout can be quite a complex issue, and the rest period should depend on the activity you are doing and the goal of the workout.

As many of you are aware, there are three systems… Continue Reading

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What is Meaningful

By Lon Kilgore Ph.D.

In ExPhysiology

April 01, 2007

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To the objective observer, it should be fairly obvious that CrossFit methods of fitness training are proving themselves in the field. Out in the real world, the average Joe who sees results like those typically seen by their CrossFitting friends are swayed by success. This is why the CrossFit community is growing and thriving.

But there is always a cadre of exercise scientists and physicians who don't necessarily believe results from… Continue Reading

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Putting Out Fires

By Lon Kilgore

In ExPhysiology

March 01, 2007

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Honolulu Fire Department, Hawaii; Orange Country Fire Authority and Oakland Fire Department, California; Woodinville Fire and Life Safety District, Washington; Marietta Fire Department, Georgia; Parker Fire District, Colorado. What do all of these fire departments have in common?

You’ve probably already guessed part of the answer: They use CrossFit, officially or unofficially, to prepare for the rigors of their profession. But there’s more. In… Continue Reading

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Perception

By Eva Twardokens

In ExPhysiology

March 01, 2007

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This article was originally written specifically about the role of perception in alpine skiing. It was written by my father, George Twardokens ("Dr. T.," as he is known), and was published in the journal Professional Ski Instructors of America. We wanted to bring some new concepts and prescriptions to the CrossFit community to get "black boxed" and refined. This article uses some of the words of my father’s article verbatim and removes most… Continue Reading

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In ExPhysiology

January 01, 2007

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In last month's CrossFit Journal, I explained why you shouldn't pay for expensive tests such as gas analysis to measure your VO2 max. Simple tests repeated often will show your improvement (or decline) and how steep the trend curve is. Expensive tests can be accurate, but if you want to know how your fitness is progressing, an expensive test, measuring one component of fitness once per year… Continue Reading

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