Alternating Crunch to Opposite Leg -Lie on your back with the ball between your feet. Extend your arms straight up above your head. Lift your head, inhale and crunch up, tapping your hand to the opposite shin. Exhale, slowly return to starting position and repeat with the opposite arm. Do 15 alternating reps. WORKS ABS, CORE, OBLIQUES

Jackknife w/Ball Passing- Lie on your back with the ball between your legs and your arms fully extended behind your head. Lift your head off the ground, inhale, squeeze your glutes, and crunch up, passing the ball from your legs to your hands, and bringing the ball behind your head and extending your legs. Repeat, but this time pass the ball back to your legs and continue passing back and forth for 10 reps. WORKS ABS, CORE, HIP FLEXORS

Alternating Crunches- Lie on the ball with your back, keeping feet wider than shoulder width. Hold your head lightly with your hands. Bring your chin towards your chest. Inhale, tighten your abs, and crunch up, twisting to one side. Exhale, pause briefly, and return to starting position. Next, crunch up to the middle, then alternate crunching to the other side. Every rep should include a crunch to one side followed by a crunch up to the middle. Do 15 reps on each side.