Spacewalkers, avoid swinging too much. Many people like the spacewalker because it is not only simple and interesting to use, but also effortless. However, if the spacewalker swings too much during use, it is easy to strain the lumbar muscles. It is suggested that the swing range should not exceed 45 degrees during use, so as not to strain the lumbar muscles.
The rotation range of the waist twister cannot exceed 180. When the elderly practice waist twisting, they should pay attention to the control of waist twisting amplitude, slow speed and gentle movements, otherwise there is a danger of pulling the waist muscles. It is suggested that the torsion amplitude should not exceed 180, and the frequency control should be completed once every 3 ~ 4 seconds.
The parallel bars are composed of two horizontal bars and a cross bar in the middle, which are mostly used for strength training. The two ends of the cross bar are fixed on the column respectively. The horizontal bar can cultivate brave and tenacious will, which plays a very good role in improving people's ability to judge orientation in different spaces and improving the flexibility and coordination of the body.