I had a bit of soreness in my hamstrings and inner thighs from squats yesterday. I varied my foot placement and went wider than normal and also pointed my toes out slightly which stress the hamstrings much more. I ran my "flat" route this morning which has 1400ft of climbing and never goes below 8000ft altitude. 9 miles with an average HR of 144/ max 152. Average pace was 8:24 which I always like to compare to a flat MAF run like Sunday. About a minute and a half per mile slower up here at the same HR. I would estimate the difference is 20% altitude and 80% terrain.