1. Bicycle Crunch
The bicycle crunch is one of the most effective exercises for strengthening and toning the abdominal muscles. As a bonus, it works your thighs and glutes too.
It's considered one of the top abdominal exercises for activating the rectus abdominis and the obliques.
The exercise is fairly simple and does not require any equipment to perform other than a yoga/exercise mat to lay down on.
To start, lay on your back flat and place your hands behind your head as you do for regular crunches.
Lift your both legs off the ground and bend them at the knees. Slowly bring your upper body off the ground and hold them there.
In one motion, twist your upper body to the right as you bring your right knee close to your right elbow.
Return to the starting position and repeat on the other side. Keep rotating sides to mimic the motions of paddling a bicycle. Complete 12-15 reps per side.
End the exercise when you begin to lose your form from tiredness.
2. Crunch Exercise
The crunch is undoubtedly the most popular "abdominal exercises" you can find it in almost every abs workout for both men and women. It primarily works the rectus abdominis and the obliques.
To start lie faceup flat on your back with your knees bent, feet on the floor. Keep your hands loosely placed behind your head.
Without pulling your head, crunch up by bringing your rib cage toward your pelvis.
Pause for 1-2 seconds then return to the starting position. Complete 15-20 repetitions
Again end the exercise when you begin to lose your form.