Gretchen Reynolds

In a study done with mice, horses and people, researchers found clues as to which types of exercise suppress appetite and why.

A new study found exercisers expel a shocking number of tiny aerosol particles when they are working hard.

Science says you may need less exercise than you think to live a long and healthy life.

In her new book, Jennifer Heisz blends personal experience and the latest science about how exercise can improve your mental well-being.

It’s the one exercise most of us should be doing. But we need to do it right.

Men and women who briefly contracted their arm muscles as hard as possible once daily increased their biceps strength by up to 12 percent in a month.

People who worked out in even moderately polluted air did not show the kinds of brain improvements tied to a lower risk of dementia.

This was featured in live coverage.

A 90-minute walk, jog or bike ride after getting vaccinated may boost your body’s immune response.

The need for healthy, active grandparents who can help with child-rearing may be encoded in our genes.