The past few weeks I have had severe pain in the back of my knees and I have been taking Jintropin for about a month and a half at 1.5 I.U.s twice a day. I have also upped my running to 30 minutes a day five days a week and also play softball and volleyball four days a week. I,m not sure if I can attribute the growth for the pains in the back of my knees or the fact that I could be just overtraining. I have always had this training schedule in the summer and have never had these sort of "Growing pains" in my knees. Any advice would be greatly appreciated.

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