Originally Posted by tigat

Went for a trail run this morning with a couple of 40 somethings, one an ultra marathon trail runner and the other from a mountain town, who spends a lot of time on the trails. A little bit short of 9 miles, climbing 1850 ft. in the first 4. They indulged me we some walking sections on the way up, but still, it was truly an "I am old and can't keep up" experience. I had a similarly humbling day in the Spring skinning up a mountain with some young guys.

Funny thing is, biked with the same pair the day before and spent much time waiting at the top of climbs and leading the paceline in 20 mph headwinds. They burned out at 20 miles and I rode 40.

Lifetime runner, 10 year avid biker, but as I've migrated much more to cycling, I just assumed that the strength and aerobic capacity would translate to things I do less often. Apparently not so.