Lie on your back and raise your legs to exercise your lower abdominal muscles
Lie on your back on the training mat, with your hands squared on both sides of your body. Straighten your legs and raise them to a 45-degree angle with the ground. Pause briefly, then slowly lower your legs.
A group of 20-30 reps, do 3-4 groups. Rest between sets for 30-45 seconds. Those with poor basic skills can rest for 60 seconds.
When lowering, lift your legs as soon as they touch the ground. Do not wait until your legs are all on the ground before repeating the exercise, so that the lower abdomen is always in a state of tension.