Soreness is harder to quantify, and even experienced runners will get achy after a grueling workout. Frankly, a runner is ...

Plus, the easy grab-and-go options that experts love.

You’re putting in the work, logging the miles, and lifting weights in the gym. But if it feels like your muscles aren’t actually getting stronger, you might be missing some signs you’re burning ...

Your muscles make every pullup, press, jump, crunch, run, squat, and curl possible. But after a brutal workout, taking a single step can feel like the greatest form of punishment. Vigorous exercise ...

You’re out for a long run filled with rolling hills and you start to feel the burn in your leg muscles. It makes sense: You know your lower body is working hard to propel you through your miles. Yes, ...

Here’s what the workout can and can’t do for your fitness. Credit...Eric Helgas for The New York Times Supported by By Danielle Friedman Q: I’ve heard that Pilates can give you long, lean muscles. Is ...