Tighten and target your abs with this 30-minute workout. In each block you’ll be doing 3 different exercises for 45 seconds each before repeating them again. Throughout the workout, be sure to drink plenty of water and choose appropriate weights for some of the lifting exercises that you’ll perform during blocks 2 and 3.

Block 1 – plank to frogs, plank & lateral leg swings, and side plank pulses
Block 2 – squat woodchops, oblique leg drops, and hand woodchops
Block 3 – 3 pulse reverse lunges, with rotator raises, glute bridge pulses, and straight leg fire hydrants
Block 4 – lying pull and push complexes, rear dealt flys, and wide stance single arm rows.