Lie face-up with legs straight, arms extended overhead on ground. Engage abs and sit up, bending knees as you reach hands to toes (as shown). Return to start; continue for 1 minute. Targets: abs, hips (see how many you can do in 3 minutes)
Start in side plank on right, left foot staggered in front of right for balance. Extend left arm above head. Sweep left arm under stomach, twisting torso until face down (as shown); return to start. Do 12 reps 3 sets; repeat on opposite side.
28% better than a crunch for sculpting your sides
Start in plank position on forearms, palms down, feet together. Flip right palm up as you move right forearm forward a few inches; repeat on left (as shown). Reverse movement: Move left forearm back as you flip palm down; repeat on right to return to start for 1 rep. Do 15 reps 3 sets. Targets: transversus and rectus abdominis, obliques