This fast-paced cardio circuit is inspired by Insanity's Pure Cardio video.

This fast-paced cardio circuit is inspired by Insanity's Pure Cardio video.

This fast-paced cardio circuit is inspired by Insanity’s Pure Cardio video. Set an interval timer or a timer app for 15 rounds of 30-second intervals. Do 30 seconds of each exercise and rest after every 4 moves. Repeat 3x for a 23-minutes cardio routine.