I can tell I am well into middle age, as I seem to frequently overestimate what would be sensible given my, erm, physical abilities.
Today's instance was going on a seven-mile hike and completing it in spot on two hours. For the first couple of miles, it seemed fun. For the next couple it was beginning to be less fun and a bit of a chore. For the last mile and a half it was "Oh, I can tell my feet are going to hurt tomorrow, but I have to get back to the car, so let's just whistle marching tunes."
Still, it was fun.
Today's instance was going on a seven-mile hike and completing it in spot on two hours. For the first couple of miles, it seemed fun. For the next couple it was beginning to be less fun and a bit of a chore. For the last mile and a half it was "Oh, I can tell my feet are going to hurt tomorrow, but I have to get back to the car, so let's just whistle marching tunes."
Still, it was fun.