The American Heart Association recommends you get at least 150 minutes of moderate exercise, 75 minutes of vigorous exercise or a combination of both each week.

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If you consider the act of getting off the couch to change the batteries in the remote control to be vigorous exercise, you might be an underachiever.

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Few studies have compared exercise to drug treatment, but two randomized trials have shown that vigorous exercise combined with cognitive treatment is just as good as spinal fusion surgery, with fewer complications.

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Vigorous exercise increases the likelihood of an attack.

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Men who were the most physically active, doing 15 hours or more of moderate to vigorous exercise each week by playing football, baseball or basketball for example, had sperm counts which were 73% higher than those who were least physically active.

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If you have no time for the gym during the week, that's OK: Recent research shows moderate to vigorous exercise even just once a week (say, a weekend jog) makes you 30 percent more likely to maintain your cognitive function as you age.

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They said they will encourage him to focus on aerobics for the next few weeks and not engage in vigorous upper-body exercise until his chest area around the device has healed.

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This should include vigorous (jogging) and moderate aerobic exercise (a brisk walk), as well as twice-weekly activities, such as weight training, which maintain or increase muscular strength and endurance.

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This allowed Halle to transform a field that was often hermetic, with grad students working alone in the library, into a group exercise, characterized by discussion, Socratic interrogation, and the vigorous exchange of clashing perspectives.

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The 2008 Physical Activity Guidelines for Americans released by the Department of Health and Human Services recommends that adults age 18 to 64 engage in at least 2.5 hours of moderate-intensity aerobic exercise (brisk walking, biking) or an hour and 15 minutes of vigorous activity (like running) each week.

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The CDC and the AHA recommend that adults spend a minimum of 30 minutes a day, five days a week, doing moderate-intensity exercise, or at least 20 minutes a day, 3 days a week engaged in vigorous activity.

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