40 second on, 20 seconds rest with 6 exercises for 3 rounds! Watch as I exert myself, breathe heavily and break out in a sweat! Plank jacks, burpees, mountain climbers, jumping jacks, squats, and lunges. exercise, HIIT training, sweaty, girl in glasses, booty shorts, sports bra, muscular woman, fit woman, arm muscles, endurance, heavy breathing, all natural, booty, muscular legs