Common abdominal and back muscle strength training methods;
1, sit-ups with hands or weight.
2. Sit-ups with bare hands or load on stools.
3. Static abdominal muscles and back muscles.
4, freehand or weight-bearing prone body flexion.
5. Bend back on the stool with bare hands or weight on your stomach.
6. Fold on your back (from both ends)
7. Sit on the bench and lean sideways.
8. Rotate by hand or with load.