"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." YOU'VE PROBABLY HEARD big guys at the gym tossing around the word "hypertrophy" when they talk about ...

Understanding how muscles grow is the key difference between training hard and training effectively. Muscle hypertrophy is ...

Plus, exactly how to train to sculpt your muscles.

You might have seen your favorite Instagram trainer mention hypertrophy on her strength training posts. Or maybe you heard the term in a fitness class or while ...