Old-school crunches are great and all, but Jaime Morales, group fitness instructor at Equinox, swears these exercises will give you tight, toned abs even faster. Try out a few or tackle them all for one crazy-hot bikini bod.
The Reverse Plank
Lay down on your back and, keeping your abs tight, lift your feet and legs a few inches off of the floor. Hold for four seconds, then do 10 to 15 reps.
The Heel Clicker
Start by lying down on your back, with your legs straight and spread wider than shoulder-width. Crunch up while clicking your heels together for a second. Move them back to their original starting position, and do 10 to 15 reps.
Lay down on your back, with your hands behind your head and your legs spread apart. Crunch your knees and elbows together, hold, and squeeze your abs. Return back to your starting position, and do eight to 10 reps.
The Twisting Scissor
Start on your back, and raise one leg in a vertical upright position while the other lays straight on the floor. Crunch your abs while twisting your torso to bring your left elbow towards your right lifted leg. Lower it down, and switch legs. Do 10 to 15 reps.
The Mermaid Crunch
Lay down on your back with your legs straight and crossed over each other. Lift your head, torso, and legs at the same time while squeezing your inner thighs, core, and abs. Hold this position for four seconds. Do eight to 10 reps.
The Spider Donkey Plank
Start in a forearm plank position, and lift your right leg up so that it's in line with your spine (see left). Pull your right knee toward your right tricep. Hold the position for a beat and then kick your leg up and back like a donkey. Switch legs, and do 10 to 15 reps on each side.
The Side Plank Kick
Lay down on your side with straight legs, and place all of your weight on your forearm. Raise your hips away from the floor and kick your top leg as high as you can. Do 10 to 15 reps on each side.
The Leg Opener
Start by laying down on your back with your legs together and straight up in the air over your hips, making a 90-degree angle to the floor. Move your legs into a V-shape while crunching forward with your arms between your legs. Do 10 to 15 reps.