This can be a problem for many reasons, because skeletal muscle is far more than the tissue that helps us move. It plays a crucial role in metabolic health, regulating blood sugar and healthy ageing.

Building muscle isn’t magic—it’s science. In this video, we reveal how long it really takes to gain noticeable muscle based on your training level, diet, sleep, and consistency. Backed by expert ...

Arnold Schwarzenegger In this video, we break down Arnold’s 5 key motivation tips for muscle growth and lasting success. From ...

This story is from Manual, GQ’s flagship newsletter offering useful advice on style, health, and more, four days a week. Sign up here to get it in your inbox. Whether you’ve been lifting for years or ...