One more thing, every time you practice, the weight is so heavy that it almost reaches your limit. If you don't practice for a while, you will be tired. If you don't protect yourself, you will get hurt.
Reduce the weight a little, and then do it several times, and the number of groups can be increased. In this way, the strength will gradually come up. Also, in order to fully stimulate muscles, the rest time between each group should not exceed 1 minute.