hiit treadmill workout

Easy HIIT Treadmill Workout for Runners So first things first, what is HIIT? More specifically, what is a HIIT treadmill workout? It stands for high-intensity interval training (HIIT) and it’s one of the top training trends in the fitness world. Why? Because high-intensity is a shorter,… Read More »Easy HIIT Treadmill Workout for Runners