Drove to the riverfront to i could run on flat,soft surface and not get too far from the car in case i needed to bail on the run. Didn't need to. Slow run. just one little spaz of the calf but no issues...no tightness after. I tried to give 4x4's a go today. I wasn't 100% from the start. I was breathing hard on short spurts. KInda bummed.. Long ride tomorrow.