I grew up playing sports all through high school, college and professionally. I never really was much into long distance running just more shorter interval type workouts. I'm 26 now and pretty much took the last 2 years off of any type of cardio and just lifted due to a knee injury. About a month ago I started a local class that works out outside and mixes a lot of running and body weight exercise together in local parks. It involves a lot of longer distance running between push ups pull ups abs and what not. Anyways I have developed a pain on the outside of my left leg and I'm wondering if it is from running more and if anyone has experienced it when they started running or if there is something you can do to help it. I think part of the problem is I went from 195lbs to 220lbs. I'm by no means fat at 6'2 I just think carrying the extra weight could have caused it.