Learning grappling is a cooperative endeavor. In order to acquire knowledge and techniques you need a partner. A good partner will allow you to move through the techniques easily, but also won’t just topple over at the slightest bump. Finding that balance can be hard, but it is critically important for the safety of both yourself and your partner. If you are constantly having to fight your partner while doing technique training that is not productive. Oftentimes, this can lead to injury for both parties. The Torii can be injured by having to strain unnecessarily when learning the technique, and the uke can be injured when the torii sets the technique in hard because of the resistance. Overall, drilling and technique training should only be taxing because of pace, if you are experiencing or perpetuating something different try to change it.