I would like to start running again. Sprints and short fast distance. But the problem is when I run or skip rope, jump, etc. I get large bruises on my left leg at the shin. Is this "Shin Splits"? How can I prevent this from happening? I had an accident about 10 years ago when I fell on the front door steps and I have had this problem since. The bruise will start small and get large as the days go by. No pain just sore.