Ruth and I went for a 50 mile bike ride today. Just did it aerobic as we took advantage of the opportunity to ride in sunny weather. Felt strong and good throughout and at one point, we hit a bit of a headwind for about 5 miles between Saguaro National Park and another park I cannot remember the name of. At that point, I just embraced it, put my head down and enjoyed the fact that I could ride strongly into a headwind two days after a century ride :)