went riding with my next door neighbors, whom I just assisted in buying their first 'new-old' road bikes. Couple of weeks ago, they ran the Marine Core Marathon. Stephen ran it in 3'20". They seemed to have no problem riding 30 miles at a pretty good clip. I am hoping their asses are at least sore today :-)

They have really well developed calf muscels and superb aerobic fitness. That amazing heart capacity sure helped them on the climbs we did. That, and the fact that I am 205 and Stephen is 170.