Pedal a bike in the air. First of all, there will be no pressure on the legs (because the friction force in contact with the air is not as good as the friction force in contact with the ground to bear the friction force that pushes the individual's weight). Due to more times, the stretching times of abdominal muscles and external oblique muscles will be more (due to more times and faster speed, there is less muscle movement here at ordinary times, which will cause lactic acid accumulation (anaerobic breathing), so the abdomen will be sour).
Self-management of muscle soreness? Rest can slow down the phenomenon of muscle soreness, slowly promote blood circulation, accelerate the elimination of metabolites, eliminate the supply and repair of nutrients in muscle soreness, and make it return to normal.
You can also warm up again after fitness, which will speed up blood flow and accelerate the decomposition of lactic acid.