Extra pounds from fat can stress the body in a number of ways. For older adults, excess weight can rub the knees the wrong way.

Recently, men have been told to consider carefully watching instead of immediately treating prostate cancer. These recommendations reflect the fact that, in many men, prostate cancer is slow growing and may never cause a problem.

Limbs slowed and weakened by arteries with plaque build-up can benefit from exercise. Sometimes, patients with those problems have no choice but to create their own exercise plans.

Breaking the tobacco habit is a sensible goal of many smokers. Meeting that target has clear payoffs. For some, including older women, it also may raise concerns about weight gain.

Perhaps kids would go outside and play more often if they weren't playing video games. Or perhaps they would get more exercise if they played active video games. Or maybe both are true!

Working at night causes changes in the body that can be harmful. In fact, the International Agency for Research on Cancer (IARC) classified night work as a "probable human carcinogen" in 2011.

Black men are at higher risk of developing and dying from colorectal cancer than white men. But when it comes to pre-cancerous growths, just the opposite is true.

The number of children diagnosed with Type 1 diabetes has been rising. Sometimes, the disease is inherited. But sometimes, factors other than genes are involved in causing diabetes.

Keeping blood pressure and cholesterol in check can prevent the leading cause of death — heart disease. Both, however, can go undetected unless individuals are screened for them.

It's a "twofer": who knew that a medicine used for fighting infections could also be a pain reliever for surgery?