Archive for the ‘Fitness’ Category

The paradox of barefoot running

Posted 28 Mar 2010 — by Todd
Category Fitness, Rehabilitation

Christopher McDougall’s sensational book Born to Run has been credited for an upsurge of interest in barefoot running over the past year, and its publication probably also explains much of the increased sales and visibilty of the once-esoteric and comment-provoking Vibram “Five Finger” running shoes.  Besides being a paean to the joys of running without shoes, McDougall’s book is certainly one of the best written, most entertaining adventure books of recent memory.  It sucks you in with tales of the mysterious hidden tribe of Mexican mountain runners, the Tarahumara, and an unforgettable cast of hardy and eccentric ultramarathoners. The adventure culminates in two exciting and unpredictable ultramarathons through the wilderness — one in the Colorado Rockies, and the other in the Copper Canyon of Mexico — with the protagonists of the book running shoeless over trails and boulder fields for 100 miles. While I’m not a total convert, after reading this book I’ve adopted a habit of alternating my runs between barefoot, Vibrams, and regular shoes. After some initial soreness, stiffness, and development of calluses, I found that my calves were strengthened in a way that significantly benefited my endurance and speed in running.

Other than recommending this book as a great vacation read or a way to rekindle your passion for running, I’d like to concentrate here on one of its central claims about the biomechanics of barefoot running, because it resonates so strongly with the thesis of Hormetism and Edward Tenner’s theories about the “revenge effects” of technology — and because it has implications that extend well beyond the sport of running. McDougall’s seemingly paradoxical assertion is that running without shoes makes one less susceptible to injury than using modern engineered running shoes, with their high-tech cushioning. Says McDougall: “Running shoes may be the most destructive force ever to hit the human foot.” (BTR, p. 168)   …How can this possibly be true?

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The physiology of stress

Posted 09 Feb 2010 — by Todd
Category Fitness, Hormesis

Do adaptations to stress exposure show up as changes in blood chemistry or heart function?  The answer appears to be “yes”.  In his Newsweek article “Lessons in Survival”, Ben Sherwood reported on a very interesting study of elite Army Airborne and Special Forces soldiers that probed the differences between those who could and could not endure an extremely stressful 19-day mock-prisoner-of-war camp.  The Resistance Training Laboratory, located at a secret location near Fort Bragg, North Carolina, subjected participants to sleep deprivation, blaring music, semi-starvation and — worst of all — intense interrogation techniques used by enemy forces during WWII, Korea and Vietnam.  ”The goal is to simulate hell on earth like the Hanoi Hilton in Vietnam or Al Qaeda’s torture chambers,” according to Sherwood.  In another test of mettle, at the Navy Diving and Salvage Training Center in Florida, trainee divers were put through stressful routines such as being thrown into a pool with their hands and feet bound, and underwater ocean swimming from 3 miles offshore to a target on shore.

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Stress management and toughness training

Posted 15 Jan 2010 — by Todd
Category Fitness

One of the best explanations of the use of “stress oscillation” for increasing physical and mental toughness can be found in the works of James E. Loehr, an athletic coach turned corporate consultant. Loehr worked with star athletes such as tennis legend Monica Seles and Olympians such as speed skater Dan Jansen to improve their performance and bounce back from defeat to become tougher and more resilient. Loehr’s insights are well summarized in two books, “Stress for Success” and “The Power of Full Engagement”, the latter co-authored with Tony Schwartz.

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