2. Sit-ups: Lie on your back on the ground or on the gymnastics mat, with your knees slightly apart, your legs at right angles, your hands crossed behind your head, and the other person holds down your feet. Elbows are required to touch knees when sitting up, and shoulders must touch pads when lying on your back. When doing sit-ups, our movements are often not in place. Usually our backs and shoulders are full of strength, but our abdomen has not been really exercised. The fitness instructor thinks that in order to make the sit-ups more effective, you can try to make the following changes-only do 10 sit-ups per minute and keep them for 5 seconds when the upper body is at a 45-degree angle with the ground. This effect is much better than 1 minute 60 times!
3, push-ups: If used properly, push-ups can bring a variety of exercises. For example, strengthen chest muscles, back muscles, triceps and abdominal muscles. Push-ups suit different people. For those who have just taken part in physical exercise, they can start with something simple. For example, you can start with your hands on the table, and then reduce the height to increase the difficulty. Put your hands on the chair, then put your body on the ground and lift it up. Let's talk about how to do push-ups effectively and correctly: face the ground, jump down, and land with your hands. The distance between your hands is slightly larger than the width of your shoulders. Pay attention to keep your body straight, balance from shoulders to toes, back and hips. Bend your hands slowly, lower your body, then hold up your body and keep your legs straight. There are ways to increase the difficulty. If you practice the above exercises skillfully, you can test the so-called "stable" push-ups: keep the push-up posture, then put away one hand, let only one hand support the body, and put the body's center of gravity on the other hand and leg.