Does it really matter what time of the day you exercise, or if you always exercise at the same time? Is morning exercise better than evening exercise? Or is this just another thing that people love to argue about?
To find out, researchers in Australia randomly allocated 40 sedentary, overweight individuals to complete a supervised, 12-week exercise program where participants walked and did resistance training three times per week for an hour. The study divided the participants into morning or evening groups.
At the end of 12 weeks, average cardiovascular fitness increased equally in both groups. Body fat and waist size also decreased equally. Both groups reported feeling less likely to overeat in response to stress than when they entered the program.
"Exercise training improved body composition and some appetite outcomes, although changes were inconsistent and largely independent of exercise-timing. In the absence of dietary manipulation, the effect of diurnal exercise timing on appetite and body composition appear trivial compared to the overall benefits of exercise participation," concluded the researchers. In other words, it makes no difference when you exercise. Just exercise at whatever time works best for you.
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