Bicycle crunches target your upper and lower abs as well as your obliques (side muscles), making them very effective for trimming belly fat.

How to do it:

Lie on your back, lift your legs, and bend your knees at a 90-degree angle.

Place your hands behind your head.

Bring your right elbow toward your left knee while straightening your right leg.

Switch sides by bringing your left elbow to your right knee.

Continue alternating in a cycling motion for 30 seconds to 1 minute.

This exercise helps tone your core and burn calories.