Lower back exercise is stretching exercise, which can exercise and stretch your waist and abdominal muscles, and has the effect of slimming waist; Split can fully stretch the leg muscles and ligaments, make the leg muscles more symmetrical, and is better for stovepipe and plastic leg. However, bending down to split, we should do what we can, we should not rush into it, we should do it step by step. Massage your waist and legs after exercise.