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Scientists Study How Little Exercise You Need
Hugh Pickens writes "Millions of Americans don't engage in much exercise, if they complete any at all and asked why, a majority of respondents, in survey after survey, say, 'I don't have time.' Now Gretchen Reynolds reports that instead of wondering just how much exercise people really need in order to gain health and fitness, a group of scientists in Canada are turning that issue on its head and asking, how little exercise do we need to maintain fitness and the answer appears to be, a lot less than most of us think — provided we're willing to work a bit. Most people have heard of intervals, or repeated, short, sharp bursts of strenuous activity, interspersed with rest periods. Almost all competitive athletes strategically employ a session or two of interval training every week to improve their speed and endurance. Researchers have developed a version of high-intensity interval training (HIIT) that involves one minute of strenuous effort, at about 90 percent of a person's maximum heart rate (which most of us can estimate, very roughly, by subtracting our age from 220), followed by one minute of easy recovery. The effort and recovery are repeated 10 times, for a total of 20 minutes and the interval training is performed twice a week. Despite the small time commitment of this modified HIIT program, after several weeks of practicing it, both the unfit volunteers and the cardiac patients showed significant improvements in their health and fitness. 'A growing body of evidence demonstrates that high-intensity interval training can serve as an effective alternate to traditional endurance-based training, inducing similar or even superior physiological adaptations in healthy individuals and diseased populations, at least when compared on a matched-work basis.'"
Define Fitness
Defined:
Despite these differences, both protocols induced similar increases (P < 0.05) in mitochondrial markers for skeletal muscle CHO (pyruvate dehydrogenase E1alpha protein content) and lipid oxidation (3-hydroxyacyl CoA dehydrogenase maximal activity) and protein content of peroxisome proliferator-activated receptor-gamma coactivator-1alpha. Glycogen and phosphocreatine utilization during exercise were reduced after training, and calculated rates of whole-body CHO and lipid oxidation were decreased and increased, respectively, with no differences between groups (all main effects, P < 0.05).
The best way, currently known, to slow age-related cognitive decline is exercise because it produces Brain Derived Neurotrophic Factor.
But did TFA even mention BDNF?
nnnnnnaaaaaaaaOOOOOOOOOOHHHHhhhhhh
Maybe the author should exercise more.
Seastead this.
No it won't. In fact, as you get fit your max HR may decrease. However, you will be able sustain it much longer. Your heart will become stronger, will move more blood per stroke, and your circulatory resistance will decrease. Your resting HR (and your blood pressure) will drop substantially so that your ratio of max HR to resting HR will increase even if your max HR decreases.
Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
You know, I used to feel the same way (i.e. macros are more important, and as long as you got your nutrients, the source doesn't really matter).
But a while ago, I changed my lifestyle -- vegetarian, gave up alcohol, coffee, and most processed foods, and just started eating healthier foods in general.
I've seen a drastic difference in not just my fitness levels, but also my stamina. I'm having the flu right now, and yet, my buddies and I just had an intense workout out for over an hour at the gym, and I didn't even feel tired.
Things like interval workouts are great, but they only work to an extent. There's something to be said about putting your body in the "zone" (as far as heart rates and muscle groups are concerned) because when you're done thoroughly working out with an entire muscle group, and you'll see much better progress over time. This, of course, is my personal experience and quite anecdotal. YMMV.
I would actually say that diet is infinitely more important than exercise. There's a reason it's said that six packs are made in the kitchen.
Someone who eats healthy and does not work out is often in better shape than someone who eats junk and "works out" for half hour a day. Most of those people just use their momentum to do some crazy exercises with piss poor forms, and eat unhealthy crap afterwards because they've worked out (think middle aged man with flabby biceps and a beer gut trying to bench press, when he probably has 30% body fat).
Yes, and doing yoga can f*** you up. So a little warming up and then straight into exercise or weights is best.
[citation needed]
http://www.independent.co.uk/life-style/health-and-families/health-news/stretching-before-exercise-is-useless-738097.html
“The basic science and clinical evidence today suggests that stretching before exercise is more likely to cause injury than to prevent it.”
http://www.runnersworld.com/article/0,7120,s6-241-287--7001-0,00.html
Several authors have suggested that stretching has a beneficial effect on injury prevention. In contrast, clinical evidence suggesting that stretching before exercise does not prevent injuries has also been reported.
http://www.ncbi.nlm.nih.gov/pubmed/15233597
“stretching before exercise is more likely to cause injury than to prevent it.”
http://www.amazon.com/Body-Science-Research-Program-Results/dp/0071597174/ref=sr_1_1?ie=UTF8&qid=1329369249&sr=8-1 p. 218-9, emphasis in original
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