Dr. Mackey’s project, “ Regenerating healthy human skeletal muscle at single nucleus resolution ,” will create the most detailed molecular map to date of how healthy human muscle repairs itself. The ...

These are some of the most jaw-dropping body transformations you’ll ever see. From massive weight loss to extreme muscle gain ...

This video documents my 3-year body transformation from age 15 to 18 through calisthenics and weight training. Progress didn’t happen fast, and there were long periods where changes felt invisible.

Changing your body requires discipline and consistency, but it doesn’t have to be an all-consuming pursuit. Despite what you’ve probably heard, you can build muscle and lose fat simultaneously. (At ...