Stressed out? This quick but effective Tabata challenge will get your heart pumping and endorphins flowing. Tabata is a form of high-intensity interval training (HIIT), explains Chapman.

This Tabata workout inspired by CrossFit is quick and lasts only four minutes. The movements are designed specifically for beginners, making it perfect if you're just starting out. If you like to ...

Whether you're a beginner or a seasoned fitness enthusiast ... high-intensity interval training (HIIT), and TABATA, take fat-burning to the next level. These sessions alternate between high ...