Feel Good

Feel Good Report: How Much Exercise Is Enough?

A recent study may help us answer the ever-nagging question.

BY May 12, 2015

We won’t insult you by telling you how important it is to exercise. But we do have to talk about the real fitness question: How much exercise does one have to get to maintain or improve health?

A recent study in the journal JAMA Internal Medicine offers some guidance:

The study, led by researchers at the National Cancer Institute, Harvard University and other organizations, gathered data on more than 661,000 adults. The researchers categorized people based on how much they reported exercising—from couch potato to fitness buff, those people who work out for some 25 hours a week or more. They looked at 14 years’ worth of death records for the subjects.

The New York Times offers this summary of findings:

  • Those who did not exercise at all were at the highest risk of early death. Shocker.
  • Those who exercised a little lowered their risk of premature death by 20 percent.
  • Those who met the federal exercise guidelines precisely, completing 150 minutes per week of moderate exercise, had a 31 percent less risk of dying during the 14-year period compared with those who never exercised.
  • The “sweet spot for exercise benefits,” as the Times called it, was among those who tripled the recommended levels of exercise, putting in moderate exertion (mostly walking) for a little more than an hour a day. Those people were 39 percent less likely to die prematurely than people who never exercised.

The takeaway message: Some exercise is better than none, and if you are worried about having to fit in lengthy, heart-pounding sweat sessions, relax. The biggest gains, it seems, are among those who can manage an hour a day and activities as simple as going for a walk. 


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