For fitness enthusiasts who need a little cardio variety, HIIT (or high-intensity interval training) has long been a popular choice. According to a study in Biology of Sport, HIIT — which pairs short ...

Functional training is one of the best ways to build a strong body, grow muscle and increase power and resilience to injury.

The 20-rep squat program is a rite of passage for serious lifters. Here's what happened when we took on this classic ...