Hi Colleen, I no longer have my splits (I had them when i was young…about 15 – i’m 38 now) and then i got into pole and started working towards them again…I almost had my front splits back and used to be about 6 inches from the ground on middle splits for the first time both about 4 years ago before getting pregnant and so just starting my splits training today.
While i haven’t experienced what you are going through exactly(with my glutes etc), I have experienced damaging muscles and healing but it was in the right side of my lower back(but I’m not a pro or fitness instructor or anything) but for me when I had problems I did exercises I could easily do without causing pain to keep mobile and those that actually aided my healing so I didn’t loose too much ground while I healed.
I also used ice to help take down inflammation which my physio told me to do first thing in the morning(there was a reason for that and I can’t remember what it was…something to do with being stiffer in the morning and something to do with the chemicals related to healing)as well as a few times a day but a minimum of four and for no longer than 10 minutes. I used a bag of petis pois peas so htey always stay in my freezer now specifically for the purpose of aiding muscle healing if i ever get the same again and I can honestly say it changed my life. (Who’d have thought something so simple and cheap could make such a massive difference!)I then did gentle mobility exercises.
There’s soooo many muscles in your bum, some of them really small and some really big and they lay in layers connecting to the pelvis from varying angles. I just had a hunt for a diagram so you could perhaps work out which specific muscle/s it is and then can adapt your training to provide relief to that area while still maintaining. Just be careful though as doing too much while trying to heal can cause more damage and keep you off for longer. My physio did tell me though to not just lounge around and do nothing but to keep progressively moving through gentle exercises. I hope that helps you a tiny bit though I’m afraid I can’t give you a full answer to your problem xxx