Of course not. Barbell is a scientific fitness equipment after deep processing, and the weight distribution on both sides is the same proportion. Can it be so accurate? Can you guarantee that your legs bear the same proportion? Can you ensure that the forces on both sides of the spine are equal? I suggest that you don't practice when you sink gently. This is the most systematic and effective way to exercise or go to the gym. As for whether the squat is fast or slow, of course it should be slow. You should adjust your breathing as much as possible, exhale when challenging heavy weights, and occasionally need to hold your breath. Only when the movements are steady and standard can the muscles be strengthened and the stress on the joints be minimized. Of course, if you don't want joints, you can do it quickly.