Having a pulling sensation in my lower left abdominal area; not painful. comes when it sit for long periods of time & when i sprint during exercise.

Muscular?: Interestingly, this could very well be a muscular pain. We don't think of muscles in that area, but pain in the psoas muscle can refer there. Granted, you haven't described any digestive-type symptoms so I'm assuming you're not having any. And inflammation of an organ or part of the intestine sitting atop the psoas muscle can cause a similar issue.