I play football/soccer on a weekly basis for a couple of hours and over the past 6/7 months I have developed a thing where after about 30 minutes into the game my thighs and groin get sore. It always feels like I ve pulled something.and then after the game over the next few days my thighs And groin will be agony. I m only 15 and the soccer I play is not for a team it is just a friendly kick about with my friends. But I feel as though im not enjoying myself because halfway through the game I have to slow down and I feel very fatigued due to this. I have tried many things to resolve the problem in the last couple of months, I consulted a doctor who gave me imflammatory tablets. I also took 6 weeks off of physical activities as well but the pain eventually came back. What could the problem be?