I've just started running again about 3 weeks ago after training hard on the bike the last 4 months with my college cycling team. right now i am in the base phase of my workout. The intensities i've been running having been slow ( zone 2 at the most). anyway the last few times i've ran i've had a sore groin near my right leg for about a day afterwards. anyone know what could be causing this problem? It's not like i've been running too hard.