At first you might think that this is just a funny way of doing sport, but no, if you know anything about physical education, doing 100 push-ups a day is bollocks to begin with, but here's what's most relevant:
I imagine it's a fake, but if Satoshi really said that, in this case he said some nonsense. You can be very intelligent and say some nonsense from time to time, it's not incompatible.
I don't know whether it's fake. But i couldn't find it on
, which is website where Martti Malmi (Sirius) himself share his email communicating with Satoshi as part of court trial COPA vs faketoshi.