Rowing Machine 2:00:00 [2] 26.15 km (4:35 / km)
Two hours of anything can wear at you. After 90 minutes my neck and left glute were hurting (as were the hands, but not terribly.)
Stuck it out for 26,150.
(Had wanted to go to the gym, but got there and had no shoes. That is what a paucity of sleep will get for you.)