When I run, I have a pain on my upper back part of right leg (hamstring). I am 55, male, and try to run regularly. From recently i got this problem. I avoided running for 2 weeks but problem is still there. No pain when I walk or ride a bike. Could you help me explaining me cause of my problem and what I should to mitigate it? Thank you...Alex
Hello, I have studied your case and I think you need to see a neurologist or a spine surgeon. Such numbness is suggestive of nerve compression in the back or vitamin B 12 deficiencies. In such cases you need to take blood serum level of B 12 and MRI of the spine. It will tell use if there is disc herniating or not. If yes then it should be taken care of. I hope this answer will be useful for you. Let me know if there is any other followup questions. Thanks