Great article. My child had been injured for about a year, and at the end of an enforced (by the sports specialist doctor) period out of the gym, she came to us and said, "I don't want to do gymnastics anymore." Her enthusiasm had been waning before the enforced rest, as she really hadn't been able to train properly and be integrated with her friends for about a year. Not surprisingly, it wasn't fun anymore for her. She was quite burnt out, and consequently she loved her time away from gym during the rest period. (We enjoyed it too!)
However, we were really concerned when she told us she didn't want to do it anymore. We just weren't sure that she was really ready to quit. I don't feel that giving up when you're injured is a good time to do it. I was really concerned that in 6months/a year's time she'd say, "I wish I had never given it up." So because of that, and in consultation with the coach, physio and a sports psychologist (whom we'd never met before, so was completely impartial), we decided that we would honour our financial commitment to the gym, and tell her that she was going until the end of the period we'd already paid for.
She accepted this readily, and went back to gym with renewed enthusiasm. Physically and mentally, that time off did wonders for her. She's been regaining skills and learning new ones that because of the period of complete rest and relaxation, her body was ready for. She's still not at the point where she'll say, "I love gym", but she is willing to admit that she's enjoying parts of it.
When we get to the end of the financial commitment period, we're not sure what will happen. But for now, she's regaining confidence, regaining skills, and slowly regaining her love for the sport.