January is the time for resolutions, and getting into shape is a good one for most people. You don't necessarily have to run a marathon, though — even a little exercise a day could help keep the doctor away.

Exercise doesn't have to be complicated. Even simple walks with friends may improve your health.

Couch potatoes, get up and move. Exercise — even a little bit — could help you live longer.

Pumping iron to stay strong may keep your heart pumping, too. Healthy lifestyle practices may prevent the majority of heart attacks in younger women.

Memory and thinking tend to slow down in older adults, but those who stay physically active may keep their minds running smoothly.

Keep on moving — or start, if you haven't already. Even a little exercise may keep your blood pressure and blood sugar at normal levels.

Being fit may make you look and feel great — and it could ward off future health risks like high blood pressure.

Want to reduce your heart disease risk? Some sun salutations or warrior poses might help.

Having weight loss surgery can improve obese patients' health, but it isn't a fix-all for health problems tied to being obese. Exercise may improve these patients' overall health even more and lower their risk for diabetes.

Every year, more women than men have strokes, according to the National Stroke Association. Healthy lifestyle choices like eating right and exercise, however, may keep stroke at bay.