2. Running only with socks, the vibration of the treadmill will cause unnecessary damage to the joints of the legs, so when choosing a treadmill, we should compare the shock absorption effect of the treadmill. For example, the patented spiral spring shock absorption+silicone shock absorption pad +pu caster of Lin Kang treadmill has a good shock absorption effect. Also, it is best to wear a pair of jogging shoes when exercising on the treadmill.