It can be washed with cold water, but the muscles are always in a state of tension and cannot be relaxed. It may be helpful for the next day's training, but doing so for a long time will reduce muscle excitement and stimulate training enthusiasm. I suggest that if you want to continue practicing the next day, you can take a cold bath and have a rest the next day. It's best to take a hot bath to relax your muscles, which is of great benefit to future training.