1, fast counting method: according to a certain rhythm, such as counting every two seconds, let the children complete sit-ups according to your password. Take 10 as an example, each group practices 10 times, with a break of 30 seconds, and practice for about 3-4 groups.

2, timing method: let the children carry out timing training according to certain requirements, 10 seconds, 20 seconds, 30 seconds, etc., so that the children can do as much as possible within the specified time. Take 10 second as an example. Parents tell their children to complete as many times as possible in 10 second. For example, the minimum requirement is 10 second.

3. Whether you are lying on the bed or sofa, you should lift your feet so that your knees are bent at 90 degrees and your hips are bent at 120 degrees to form a step shape. This is the correct starting posture. You should roll up your upper body when you do it, not lift it.