I wondered if any of you could help... I started running last June and have completed the MoRunning 10k in Greenwich in November (1:04) and the local Colchester Santa 5k (28mins). Both were new to me as I have not run any races before and both were quiet hilly runs (especially Greenwich). I run three times a week and average two 5k runs and a 10k run as part of my training and have followed coaching program's to get me running and to get me in shape for the runs - especially the 10k. I always start with a 5 minute warm up walk and end with a 5 minute cool down walk. I did attach before both runs and did the aerobic exercise in the Santa run to get warmed up. I am not sure what I am doing wrong though as after both runs I am left with pain in my lower back and groin - this isn't something I experience when running on my own. What could be the cause of this and what could I do to help it? I am training on hills but am not sure if I am simply trying to run too far too fast at the beginning of the races... My friend has convinced me to run a half marathon in October and although I am looking forward to the challenge I am worried that I may cause myself some damage if I keep getting this pain during and after races. Any help you could give would be gratefully received.