Knowledge Center

You’re slammed with deadlines and duties and can’t do your usual 45-minute treadmill session or kettlebell workout. No worries! When you don’t have time to work out, strap on your cross trainers and enjoy this 10-minute cardio and strength-training HIIT session.

How to lose fat from the gluteal fold: a keto diet for getting rid of stubborn fat deposits, exercises to help tighten the gluteal area, and possible surgical options to get the physique you desire. Also find out why this underbutt fat is so persistent (hint: it may have to do with your smarts).

What is the difference between slow-twitch and fast-twitch muscle fibers, and what are the unique training techniques for each? Which sports combine both? Learn the nuances between different types of skeletal muscle fibers, and how to target all of them via our top 12 training tips.

Learn about the three muscle fiber types in the body and what kinds of medical conditions can afflict them. Also discover which muscles are out of your control, and which can be built up and improved with targeted exercise, proper supplementation, and a willingness to put them to work.