FAST ACTING AB EXERCISES

The fastest way to see your abdominals is to overhaul your eating habits, start doing a lot of cardio and work your abdominals with hardcore ab exercises. If you are just focusing on the ab exercises, you want to do fast-acting ab exercises to get the best results possible in the least amount of time. The exercises themselves won't get you there in one go. Do these exercises every day you can as long as your ab workouts aren't back-to-back.

Knee Lifts

The knee lift trains your abdominals and your shoulders. The intermediate version of the exercise has you holding a water bottle between your hands. Make it harder by holding a heavy medicine ball and wearing ankle weights. To begin, stand with your feet hip-width apart. Pull your abdominals in tight to brace your lower back. Raise your arms straight to the ceiling. Then, lift your right knee and lower your arms to almost touch the bottle to your knee. Feel your abs crunch as you do this. Bring your arms above your head again and return your foot to the floor. Repeat with the left knee. Continue alternating knees until you fatigue or perform up to 10 repetitions per leg.

All-Fours

The all-fours exercise trains the abs, legs and arms. This exercise is an intermediate-level core exercise but you can make it harder by holding dumbbells in your hands and wearing ankle weights. To begin, lie on your back. Bring both your arms and legs perpendicular to the floor with the palms facing each other and your feet hip-width apart so all four limbs are in the air. Before you do anything else, squeeze your abs as hard as you can while still being able to breathe. Hold them tight no matter what. Then, lower your right arm overhead until it is about an inch from the floor. Drop your left leg so that your heel is also an inch from the floor. The arm and leg move in opposite directions. Reverse the movement. Switch limbs and lower your left arm and right leg. Continue until you reach fatigue or have done 10 repetitions per side.

Bicycle with Medicine Ball

The bicycle with medicine ball exercise takes the popular ab-killing bicycle exercise and makes it even harder. You may do the exercise without a ball and work up to the ball if you need to. To begin, lie on your back and hold a medicine ball to your chest with your elbows bent. Bring your knees above your hips with your legs bent. Curl your head and shoulders off the floor to bring the ball toward your thighs. Extend your left leg and bring the ball to face your left hip. Pull the left leg back to the bent position and extend the right leg as you twist to point the ball toward your right hip. Continue to alternate until you cannot bicycle anymore.