I'm primarily a cyclist, but like to do some running in the fall/winter. Even if I start off very slowly with a run/walk program, I get sharp pains on the sides of my shins. I'll also get pain and trigger points on the insides of my legs, where my leg makes the 90 degree bend. I run in newer running shoes and recently bought a pair of five fingers shoes, not for running, but just for walking/cross training. If I wear them for too long, I'll experience the same pain. I also have some pain in my upper calf when I run, just below the knee, something I get when I overexert myself on the bike.

Any ideas or exercises I can do to strengthen the area?