Forget what you’ve heard about "toning" vs. "building"—science proves all muscle is created equal, and your ultimate look ...

Let’s get one thing straight: Muscle is muscle. Despite what many fitness influencers may have you believe, there’s no such thing as "lean muscle" or "bulk muscle." It’s all made from the same stuff.

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 ...