Re: Pain in aikido?
The way I understand this is that pain is a necessary part of some techniques (for example, pressure points based techniques). In addition, while applying most pins, the relevant joints generate pain.
It is possible to practice pinning techniques without pain, but only if Uke will be sensitive enough to realize the lock is on him before the pain sets in. Tori should do the technique to the best of his ability, and continue the pin well in to the pain if Uke does not signal him to stop.