I'm trying to bring my 3mile runtime down from about 24 minutes to as close to 18 minutes as possible. I know it'll take time, and I've got plenty of it. What I'm worried about are my feet.
I run about 3-4 times a week as it is. My feet ache BIG time, and that usually causes me to want to stop. I can keep my breath, and anything from my knees up is fine. Basically my calves and feet are screaming by the time I hit about 800 - 1200 meters. I've tried motion control shoes, neutral shoes, cushioned shoes and nothing has really changed.
I'm thinking my feet and calves are just a bit weak, BUT I'm worried that if I increase how often I run per week I'll run into problems with stress fractures, etc. I've tried to ask a few Marines what they do, but I don't get a clear cut answer other than they just do it.
Any suggestions? Am I doing something wrong? I'm currently running in a pair of New Balance 498 shoes, but I also have a pair of Nike Air Max, a pair of Reebok pump 2.0's and some Asic motion control shoes.