Locking structure and fitness equipment

The utility model relates to the technical field of fitness equipment, in particular to a locking structure and fitness equipment, the locking structure comprises a sleeve body, a stand column and a locking knob, the sleeve body is sleeved on the stand column, the locking knob is in threaded connection with the side wall of the sleeve body, the locking knob can be screwed inwards to abut against the stand column, and the stand column is sleeved with the sleeve body. A plane bearing is further arranged between the inner end of the locking knob and the stand column. According to the locking structure and the fitness equipment provided by the utility model, tightness adjustment between the sleeve body and the stand column is realized by jacking and releasing the stand column through the locking knob, so that the vertical height adjustment of the sleeve body is facilitated, and meanwhile, the stability of the sleeve body after adjustment can be ensured; and a plane bearing is arranged between the stand column and