The adjustment method is as follows: 1. First unplug the power cord of the treadmill to ensure that the treadmill is in a power-off state, then adjust the left and right bolts of the treadmill with an Allen wrench, and grasp the adjustment range according to the tightness of the running belt. It's best to adjust it half a turn first. 2. Start the treadmill and check whether the tightness of the running belt is appropriate. If it is not suitable, follow the first step until the adjustment is appropriate. Through the above two treatment methods, the phenomenon of running belt slipping of treadmill can be basically solved. Is it simple? Some friends may not have a good grasp of the tightness of the normal running multi-groove belt. I love Jian's side Xiao to tell you an experience, that is, when the running belt is just tight, the multi-groove belt on both sides of the treadmill can be lifted by hand for about three or four centimeters. This is a small experience, you can try it.