Here is a great workout with 30 sec cardio/50 sec exercise format. Choose any form of cardio – I alternated between jacks and a shuffle jog. High knees, jump rope, burpees are other options. The exercises are: plank jacks, crab toe touch, side plank hip lift – r/l, oblique push up, jump squat, superman, low jack, down dog push up, 180 jumps. Do 1-3x through!