WHEN Gabrielle Lyon, DO, was 5 years old, her father would take her on 10-mile bike rides. Physical activity wasn't a question, she says—it was part of her day-to-day life from a very young age. As a ...

"Aren't they a little young for that?" This is a question I used to hear regularly from parents when I'd recommend strength training for the kids I worked with, whose ages ranged from 6 to 18 years ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. For years, my kids ...

Muscle growth requires patience. Experts break down exactly how long it will take you to see visible muscle definition and what habits you need to achieve it.

Exercise for kids should be fun. Instead of working out, think of exercising with your kid as "exercise play." That's the term used by Ewunike Akpan, a personal trainer certified by the American ...

Zachary Gillen does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond ...