Some of you may remember my daughter is a wrestler and a boxer who is hoping to be an MMA fighter. She is 12 years old now but big for her age and her body is undergoing puberty. Her physical maturity is closer to 13-14. She is 5'4 and 115 lbs. My daughter was doing crossfit over the summer and it ended up helping her a great deal with her explosiveness which has always been a serious problem for her particularly when shooting. Her coaches were very careful to help her with form and making sure she developed skill well before she lifted any significant weight. We stopped going regularly for a while and just maintained what she was already lifting in the gym at the school in preparation for the wrestling season. My daughter is hyper-mobile and she frequently runs into problems finding stretches that work for her, and what she notices is that a stretch will work for a while and then just no longer challenge her. Leading up to the wrestling season, she started to notice her glutes were sore from wrestling practices. She was not getting sore from any of her typical lifts. (Deadlifts, front squats, back squats, etc). After a one wrestling practice she came home and had a little discomfort while sitting. We do small crossfit style workouts at home with considerably less weight then she is capable of lifting. (We live in an apartment, so small weights are really all that is practical). So we started her Fran workout of pull ups and thrusters for time using a 30 LB composite barbell. (Her 1 RM for Front Squats and Push Presses the two individual motions of the Thruster is FAR more then 30LB). She began her workout and was doing excellent. At one point during the workout she said she felt a pop. I asked her if it hurt and she said it didn't, so she continued and actually shaved about 10 seconds off of her time from the previous week. About 10 minutes or so after the workout was when she developed pain in her tailbone that would manifest while sitting and while standing from sitting. Long story short I took her to the ER, and then to the sports doctor, after X-Rays and an MRI they determined that there was nothing wrong with her tailbone, and that she had no fractures anywhere else. They prescribed physical therapy. Physical therapy determined that her hamstrings, and glutes were very tight. And that she has weaknesses in her hips, hamstrings, and glutes. They had her doing an insane amount of primarily body weight exercises to build strength in those areas. And had her do stretches most of the time afterward. I found myself kind of puzzled how the solution to dealing with tight hamstrings and glutes was to do things that inevitably make those things tight. They said when I asked about it that is why they had her stretch. The problem was as I described earlier, stretches don't work very well on her and eventually become useless. Meanwhile, I took her to the chiropractor, and the massage therapist. The chiropractor said that her hip is out of alignment. The issue with this is that doctors point out that chiropractors apparently say that about everyone. They would give her adjustments and she did say she moved a little better afterward. The massage therapist eventually realized that her sacrotuberous ligament was seriously tender. So she started working on it and that seemed to have the most effect of anything that we have been doing. So now about 3 months later, almost $7,000 in physical therapy and a considerable amount of money spent on chiropractors and massage she is at this point going to miss the entire wrestling season. She has slowly improved but I am strongly starting to feel that the only thing that has actually been helping her is time. Working with physical therapy three times a week they are still reporting that she is very weak in her hips, glutes and hamstrings despite them having her work these things for almost 2 hours a session. The sports doctor at the end of this time period was kind of sheepish as she didn't understand why my daughter wasn't better. I had to take my daughter out of school because sitting down in class was complicating her injury. She was able to do 90% of her work at home anyway so it didn't impact her grades. Nothing we do seems to solve the tightness in the glutes and hamstrings. My daughter says every time we got to massage she feels a bit better. But it has been an absurdly slow process. Thoughts? Advice?