Do each for 30 seconds in two sets with a 10-second break
RAISED LEG CRUNCH Targets: Lower and middle abs Lie on your back with legs raised straight up, the soles of your feet facing the ceiling (A). Crunch your upper body up and reach for your toes (B). Slowly lower your upper body back down to start..
WEIGHTED CRUNCH Targets: Upper abs Lie flat on your back, knees bent, holding a dumbbell at your chest (A). Crunch your upper body up and straighten your arms to bring the dumbbell towards your knees (B), then lower back down. Feel the burn.
RUSSIAN TWIST Targets: Side abs Sit on the floor with your knees bent, holding a dumbbell in front of your chest. Slowly lean back to a 45-degree angle, keeping your spine straight (A). Rotate to the right and tap the dumbbell on the ground (B), then repeat, twisting to the left.