Get used to running in weather in the 30s, then do sprints on a sunny 70 degree day. It's a big difference.
"Get used to running in weather in the 30's, the do sprints on a sunny 70 degree day. It's a big difference."
I'll agree with you there. But how do you resolve something like this? Weather is just a factor in football, but 19-22 year old bodies can't be impacted that much by a change in temperature, one way or the other. Older guys, maybe!