I actually have the same experience, for two reasons that I can feel. #1 is cooling. I feel MUCH hotter running with the wind at my back than with the greater air movement from running into the wind. #2 is what I call "ram air induction."It's just plain easier to breathe when the wind is pushing fresh air into my mouth and nose.
But my speed definitely suffers into the wind - it's super apparent when I'm running intervals or mile repeats back and forth over the same stretch.



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It's just plain easier to breathe when the wind is pushing fresh air into my mouth and nose.
. Maybe I'll work in some intervals a couple of times a week and see if it makes a difference in my "cruising" speed.
!) and pain free.