You’ve probably noticed that we like to revisit subjects, no matter how exhaustive our prior analysis may have appeared. We do this for two reasons – to foster a running dialogue on a constantly evolving idea; and to make sure the Primal Blueprint remains supported by hard science.
Mark has always talked about his affection for the beach sprint (or any type of sprint) as a quick, intense, effective cardio workout in line with the type of daily activities Grok performed. He’s also conveyed his unease with our increasing reliance on Big Pharma for our health and wellness needs. Today’s post deals with two recent studies of particular interest and relevance to these topics. We found them quite interesting, and we think our readers might too.
As you probably already know, we’re big on sprinting around here for a number of reasons. First of all, sprints most closely emulate the type of activity Grok would have performed. You know – slowly stalking and hunting an animal for hours at a time (the constant, steady movement I prescribe) only to erupt with an intense burst of speed for the final kill (the sprint). Then he’d have to lug the thing back to camp (deadlifts, squats, and other high-intensity weight bearing training). Sprints are great because they are exactly the type of movement that man has been making for hundreds of thousands of years. Why mess with a good thing?
Last week I was approached by Gym Junkies to be part of an article in which I and other health and fitness bloggers describe their top 3 favorite exercises with a little reasoning behind each of them.
Here are my current top 3 favorites:
1. Barefoot beach sprints. I ran 80-100 miles a week for years, but I feel more like a true runner just doing one set of these each week (and no other running except when I “play“). Nothing beats the flat, hard sand at low tide with the sun just coming up to make me feel connected to everything. Speed, baby.
Not too long ago, we ran a story about how to incorporate plyometric exercise into your fitness round-up, but warned that because of the explosive nature of plyo exercises, this one was probably best left to those that were in the upper fitness brackets (and free of any sprains, strains or other injuries!).
This post elicited feedback from Mark’s Daily Apple reader, Barry, who wrote:
I’ve been reading your site for almost a year and have adopted a Primal eating style. Before doing so I was out of control having ballooned to almost 350 lbs. I haven’t gone 100% Primal so the weight is coming off slowly. I am now down to 300. My goal weight is 200 lbs. For activity I have been walking and doing some light free weight activities. It is about all I can muster. I read your Primal Plyos posts with fascination and can’t wait until the day comes that I too can do beach sprints, but for now I am limited. What is a 300 lb person to do for exercise? Hint: I can’t jump or sprint like Grok.
A study (abstract here) published online in the American Journal of Physiology, Regulatory, Integrative & Comparative Physiology suggests that short but intense bouts of exercise can confer the same health benefits for the heart as longer, less-intense activities.
For the study, researchers from McMaster University in Ontario, Canada recruited 20 healthy but untrained individuals and assigned them to perform a six week series of either low-volume sprint interval training (SIT) or traditional high-volume endurance training (ET). Specifically, the SIT group performed between 4 and 6, 30-second “all-out” Wingate Sprint Tests separated by 4.5 min of recovery, 3 days per week. The ET group, meanwhile, completed 40-60 min of cycling at moderate intensity, 5 days per week.
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