High-intensity interval training is one of the best ways to pack a lot of exercise into a short period of time. HIIT workouts are so efficient because they alternate short bursts of very intense ...

Nick Blackmer is a librarian, fact-checker, and researcher with more than 20 years of experience in consumer-facing health and wellness content. High-intensity interval training (HIIT) is beneficial ...

Workout Buddy for the iPhone and Apple Watch is designed to spur you on while you're working out. I powered it up on my ...

Specifically, this is a good workout for people who are already experienced in the gym, but can’t reliably make time for more than two workouts per week. You can get a lot done in two workouts, if ...

Hedy Phillips is a freelance lifestyle writer based in New York. While she's not writing on topics like living on a budget and tips for city dwelling, she can usually be found at a concert or ...

Many runners find pushing themselves in training and racing as one great source of enjoyment for the hobby, which is why once a month in our Runner’s World+ member newsletter we describe a quality ...

Brian is a New York–based science and health journalist. His work has been published by The Atlantic, The Paris Review, The New York Times For Kids, CBS News, The TODAY Show, Barron's PENTA, Engadget, ...