If exercise feels harder than it should, chronic stress may be working against you. Learn how to regulate your physiology so your body can support your fitness goals.

All gym routines have an element of predictability about them, so when a fresh way of lifting weights—like the 6-12-25 ...

Exercising and improving physical fitness consistently rank as the top New Year’s resolution among U.S. adults. Here's what ...

Not exercising enough can cause weight gain, lower energy levels, and increased risk of disease. Learn more about the ...

For a program to be most effective, Washington recommends sticking to it for at least four to five weeks before changing it ...

I wound up having a torn meniscus, and elected to have surgery, which was supposed to take two weeks to heal. What ended up happening? I had to walk with crutches for over three months, and a cane for ...

Building muscle has huge health benefits, but working out takes time. So what's the least amount of time you can spend at the gym and still see the benefits? Research shows it's less than you'd think.

Natalie Grabow, an 80-year-old retired software engineer in New Jersey, started her fitness journey after her college graduation. Instead of doing less physical activity as she got older, she actually ...

Mike De Socio is a CNET contributor who writes about energy, personal finance, electric vehicles and climate change. He's also the author of the nonfiction book, "Morally Straight: How the Fight for ...