So I recently just bought a pair of ON runners, specifically the cloud x model. This shoe is less cushioned than my previous shoe which is the Brooks Ravenna 10. Aside from the cushioning/support, the heel to toe drop is also different from 10mm to 6mm. The part that hurts is mostly below the calf when it gets stretched (I think that's the plantaris tendon). I've only used yesterday for a short 5.3km run which took 30 minutes. Today is the only time I felt the pain. Based on the ON website, the shoes will make your muscles activate so that my pronation or over pronation will become part of my running. Anyways, is any of this normal for new shoes?