28 Jun '14, 9pm

How Much Exercise Makes You Smartest?

In this case, the 45-minute session (55 including warm-up and cool-down) actually produced worse accuracy than the control condition, where participants just sat and read instead of exercising. So the message seems to be pretty clear: about half an hour of moderate exercise optimizes cognitive performance, and more than that may hurt it. Now, there are a few questions that this study isn't able to answer. For example, the volunteers in this study were healthy university students, but not necessarily fit. Would the same relationship hold with, say, habitual runners or cyclists? Even though intensity was normalized using heart-rate reserve, it's not hard to imagine that 55 minutes of exercise would be much more fatiguing for someone who doesn't exercise regularly than for someone who runs for an hour every day. But that's a question for another study to answer.

Full article: http://www.runnersworld.com/sports-psychology/how-much-ex...

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