To reap the full range of life-extending, heart-protecting, sleep-promoting, obesity-thwarting benefits of exercise, you're going to have to get some regular activity. In fact, about two and a half hours a week of it. Those two and a half hours should be moderate-intensity aerobic activity (think: brisk walking), according to the Physical Activity Guidelines for Americans. (More vigorous exercisers can cut back on time as they up the intensity, but everyone should also aim for a couple of strength-training sessions a week, according to the Guidelines.) But exercise also happens to be one of those cases were something is most certainly better than nothing. While we can only encourage you to...
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