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Need a timer? Grab one from Gymboss: Like the music? Get the album by James Granstrom here: Become an Olympian! This is the ultimate Olympic HIIT style time challenge with 5 exercises, and 3 rounds. 20 seconds on, 10 seconds rest for 4 minutes then 1 minute active recovery to complete a 15 minute fat burning workout. #getlean 1. Sumo squat jumps 2. Plank with jump open and close 3. Walking burpee 4. Jumping jacks 5. Hamstrin
