Sit-ups and sit-ups
Lift your legs and head at the same time. You must persist. This is how the army trains. If you persist without moving for an hour or two, , I believe it is more effective than doing thousands of sit-ups. Give it a try. It is quite effective, but it is more tiring than sit-ups. The most important thing is that it cannot be moved. Sit-ups are done one at a time. This is very strenuous, flat and continuous. Breathing also requires skills. It is best to exhale every few minutes, otherwise you will get tired easily. It is best to practice holding your breath first, otherwise you may get tired, but you must have endurance first!
Video tutorial on standard sit-ups:
Sit-ups can be done with or without pressing the feet, and the upper body can be raised or the lower body can be raised. It is easier to do sit-ups from both ends, and you can lie down in a straight line. shape, and then use your butt as the fulcrum to make a V upward. If the time is long enough, the abdominal muscles are good enough, and the flexibility is good enough, the angles of the V can almost coincide; when doing it, use the right strength and don't pursue the quantity. Pursue quality, otherwise the abdominal muscles trained with incorrect posture for a long time will be asymmetrical and unsightly!
Precautions for standing up from both ends when lying on your back
It is very simple to lie flat on your back and raise your arms in a straight line with your body. Relax your legs and arms appropriately without using too much force. The abdomen, back, and thighs are the main parts of the force. Keep the buttocks as the pivot point. The upper body and lower body are in a straight line. When standing up, they form a positive V shape, which is the best and less likely to be injured. Pay attention to opening and relaxing.