My other non-biking sport is... biking, so I can't be of much help there. However, my wife plays soccer at a fairly high level 2-3 times/week, plays squash 2-3 times/week and is in the gym 4-6 days/week. On top of this she bike commutes unless it's colder than -20C. When she is tired from all her various activities but still has to ride home, she just rides slowly. Sometimes she comes stumbling into the kitchen and lays on the floor for a while, complaining about how tired she is. It's really quite entertaining.