0 1 First, lie on the ground, put your hands straight at your sides, then lift your thighs until they are at 90 degrees with the upper body and 90 degrees with the lower body, and then start to ride a bike. Remember to keep your hips close to the ground and repeat 8 to 16 times.
First, lie flat on the mat. Secondly, push your hips up and move your heels inward until your calves are at 90 degrees to your knees. Repeat 8 to 16 times.
03 Lie flat first, then lift one foot straightly, making a 90-degree angle with the body, push the toes upward as far as possible, then slowly put it down, change the other foot, and repeat for 8 to 16 times. Finally, lift your legs at the same time, which is 8 to 16 times.
First lie flat on the ground, then raise your thighs to about 60 degrees with the ground, and your calves are parallel to the ground. Then the upper body and thighs are raised to about 30 degrees, and at the same time, the hands are in a posture parallel to the ground, and this is repeated for 8 to 16 times.