"if you don't use it, you loose it"

The past month has been difficult for me. I'm out the front of the physios again about to get some more treatment on my hamstring. After re injuring it around a month ago, I was confident it was not nearly as bad and I'd be back at training by now. Sadly that hasn't been the case and I'm having trouble trying to stay positive.
I've stepped through my rehab exercises and just expect it to have healed by now but every time I try to stretch it out I still feel that uncomfortable sensation that the muscle has no flexibility in it and it just wants to tear again. This is the last week of training so I'm resigned to hopefully making it back by January next year.
I have kept myself partly involved with our new club in airport west were my sister, Nicole has started training. The place has a fresh new feel to it and it is conveniently located just off the freeway making it easy for me to get to after work. The classes there, run by Kat, have a different feel to the usual stuff we do in the athlete program. Of course it's a technical class and therefore we've been doing all the good stuff that as sport sparring athletes gets neglected.
This has made me conscious about what I have forgotten in the two years since I got my black belt. As the old saying goes "if you don't use it, you loose it". This applies to everything in life. Now I'm not to fussed about my patterns as I'm in no hurry to continue grading at this stage but it does emphasize the need to continually work on the basics in sparring.
I've noticed previously that when I've been forced into extended time off that it generally takes twice the amount of time to get back what I had. The basic technique will always be there but its the speed and power which tends to take time to return.
In any case I know once I'm allowed to train again I will be spending many hours in front of the bag just focusing on the basics.