Minnman: As I was reading your post I kept thinking that it could have been me authoring it. I pulled my left hamstring 15 miles from home in 95 degree heat and had no other choice but to HTFU home. This was back in early August. It wasn't bad enough to quit riding but would announce itself a couple times a week. I backed way off of my mileage, avoided high temperature situations and increased warm-up duration. It wasn't until Oct that it went away. Did I do the best thing for it? Maybe not but it was a livable compromise.