So we're going to assume you're a masochist and you actually perform your HIIT intervals at 80%+ of your max. HIIT can be a really time efficient to achieve fairly substantial health and fitness gains. Or it can kill the gains you've made and make you weaker and smaller. It just depends. HIIT: The Good When compared to MOD (moderate intensity continuous exercise) High Intensity Interval Training (HIIT) appears to be the bees knees. It's been shown time and again to Time Commitment? You can get a lot of fitness done in not a lot of time, "As little as 3 HIIT sessions per week, involving≤10 min of intense exercise within a time commitment of ≤30 min per … [Read more...]