exercise

In his new book, researcher Martin Gibala explains that workouts with periods of intense exercise aren't just for the super-fit. They also help make the most of limited workout time.

Yoga has been promoted as the cure for many ills, from diabetes to insomnia. Scientific proof is mixed. But this skeptic says if yoga makes climbing the stairs hurt less, that's good enough.

Interval training is a hot thing. Alternating bouts of relatively intense exercise with recovery can provide some benefits of longer workouts in less time. But you still have to put in the work.

Nobody wants to spend the last few decades of their lives in a wheelchair. People in their 70s and 80s recovered more quickly from physical setbacks if they remained active, a study finds.

Injuries at the indoor parks are still dwarfed by injuries on home trampolines. But researchers warn that the parks seem to result in more serious injuries that can require admission to the hospital.

From sports camps to running around on the playground, kids can log long hours in the summer heat. Many don't stop to drink water. A few simple moves by camps, coaches and parents can help.

In mice, monkeys and people, exercise releases a protein called cathepsin B. And as blood and brain levels of this protein rise, memory gets better. But the protein has a dark side, too.

A survey of parks in 25 major cities find that they're used mostly by young children and teenage boys. Walking loops and other options that would appeal to women are in short supply.

Jaime Rangel was 14 when he was diagnosed with Type 2 diabetes. Bike rides helped him get in shape and defeat the illness. Now 26, he's showing other kids from low-income families how to do it.

What you do in your 20s and 30s and 40s can make it more likely that you'll be mobile and healthy in old age, scientists say. That's true even if your ancestors didn't fare so well.