Lately it's gotten to the point that I'm almost concerned. I am coming back from a little nagging injury and picking up the mileage (over the last 6 or so weeks). But it's nothing I've not done in the past. I haven't run more than 6 miles. And everything is at a very easy pace. I expect the sweat when it's 90+ outside. But lately my indoor runs with AC in my face still have me in squishy wet shoes at about the 5 mile mark. It was never that bad before. Heart rate is in the same place it was before the injury. Just more sweat. I actually felt really good today. Didn't feel like I exerted myself all that much. But it looked like I ran in the sauna. I walked straight into the shower in my clothes.
I realize sweating isn't a bad thing, but it's to the point where it's going to be hard to get long 10+ mile runs in when your socks are completely soaked for more than half of it.