High Intensity Interval Training (HIIT) Induces Specific Changes in Respiration and Electron Leakage in the Mitochondria of Different Rat Skeletal Muscles | PLOS ONE
Michelle Bridges 12 Week Body Transformation - Because burning cals and getting fit doesn't have to involve a complex HIIT workout. Results can be GOT from these easy, simple 'everyday' activities -
Cardio with Compex
30 MINUTE DUMBBELL HIIT WORKOUT + Bodyweight | Complex Series - Day 5 - YouTube