1. Push-ups: Push-ups are classic exercises to exercise arm muscles and chest muscles. You can do it on the dormitory floor, with your hands shoulder-width, your toes on the ground and your body in a straight line. Keep your elbows close to your body, bend your elbows downward, keep your chest as close to the ground as possible, and then push up. Repeat this action.
2. Sit-ups: Sit-ups mainly exercise abdominal muscles. Lie flat on the dormitory floor, feet fixed, knees bent, hands behind your head or chest. Lift your upper body with abdominal strength, try to let your elbow touch your knee, and then slowly put it down. Repeat this action.
3. Inverted support: Inverted support can exercise arms, shoulders and core muscles. Stand against the wall in the dormitory, with your hands on the ground and your feet stretched upward. Keep your body straight and push your body up with arm strength until your arm is straight. Then slowly return to the starting position. Repeat this action.
4. Wall push-ups: Wall push-ups are an exercise method based on push-ups and supported by walls. Stand about an arm away from the wall, put your hands on the wall, and then do standard push-ups. This posture can better exercise the arm muscles.
5. Stretching: Before exercise, some stretching exercises can help prevent injuries. For example, you can stretch your arms, legs and back.
6. Aerobic exercise: Although these exercises mainly enhance muscle strength, aerobic exercise also helps to improve cardiopulmonary function. You can choose simple aerobic exercise such as skipping rope and kicking in the air.
Please keep the correct posture during exercise to avoid injury. According to your physical condition and ability, gradually increase the intensity and frequency of exercise. At the same time, keep enough rest and a reasonable diet to help muscles recover and grow.