5 Quick And Easy HIIT Workouts For Toning The Whole Body - GymGuider.com
Given how popular high-intensity interval training (HIIT) has become in the past few years you might assume that it’s a relatively new concept, but that’s nothing like the truth. His innovative strategy paid off in the shape of three golds in the 5,000m, 10,000m and cross-country events.Despite HIIT being over a century old, however, people still sometimes struggle to distinguish what it actually is beyond “hard work, short rests”.
