High-Intensity Interval Training: The Ultimate Guide

Get the story behind high-intensity interval training (HIIT), its muscle-building and fat-burning benefits, and how you can integrate it into your workouts!

Have you ever compared the physique of a world-class distance runner with that of a world-class sprinter? The sprinter’s body resembles that of a Greek Adonis, with chiseled arms and powerful quads, while the skinny-fat distance runner makes Richard Simmons look like a Mr. Olympia contender.