Posted in: Workouts / Workout Programs

Insane HIIT Challenge - Bodyweight Only High Intensity Interval Training Workout

Gonna tackle this beaut tomorrow. But I realise there's a good part of FB that I've not tried yet and was idly wondering 'what is the toughest workout routine that Fitness Blender has to offer?' It'd be interesting to hear everybody's answers because I imagine everyone will have different ideas.