Fitness

Two decades of research confirm that weight loss is about burning more calories than you consume—but what you eat is more important than how much you exercise

A neural circuit seems to control compulsive food consumption

Recognition of the risks posed by UV rays has motivated scientists to study what’s going on in our cells when they’re in the sun—and devise modern ways to ward off that damage

Online support groups aim to fill a void

Dwindling infection rate makes reliable data hard to gather

Activity trackers accurately reckon heart rate—but they're way off in estimates of energy expenditure. Christopher Intagliata reports.

People who ate cocoa one to three times a month less likely to be diagnosed with atrial fibrillation

Diseases with these traits occur throughout the body

One physiologist wants us to stop worrying so much about fighting infections and instead help the body tolerate them

What do you do when you have back pain? In part 2 of our low back pain series, learn the more common causes and treatment of low back pain.

Rushing to "fix" intersex infants can cause far more harm than good