Posts Tagged ‘Mitochondrial density’

7 Ways HIIT Supercharges Your Heart, Muscles, and Metabolism for Peak Performance For everyday endurance athletes, the quest for improved performance like in gravel racing, trail running, and cyclocross, often focuses on long Zone 2 workouts that build stamina, durability, and endurance.  However, incorporating High-Intensity Interval Training (HIIT) into your training regimen is as important…