Completed week4 (one day late but as i mentioned, alot going on atm.) Mixed feelings about this run. Frustrated at my fitness improving but muscle strength not so fast... i can jog along quite happily now for quite a while breathing wise i am not too out of breath any more. My issue is my legs. They ache and become so fatigued that it is stopping me... i find i have to take a minute to stretch and shake them out after the third run. What can i do to help. I wear structured shoes for my overproned feet which should help combat fatigue from bad posture but my calves are sore most of the run. Aches and pains are normal i guess amd maybe i just have to wait for my muscle strength...any ideas how long that might be?!