Leg raiseš¤ Itās a simple but effective exercise for your lower abs, it also improves the strength and flexibility of your hips and lower back. Tip: keep your legs as straight as possible, and lift them as much as you can, then lower them but donāt let them touch the ground and hold them there for a few seconds, thatās when you feel your ab muscles working.šŖš»š¦ Repete the same proceds and do 25 Reps- 3 sets.