I don't think I should get into the PT that we did here at RMC during First Year Orientation...
One afternoon, we had 3 hours of Combat PT where we carried stretchers loaded with 4 full jerry cans of water up a local hill (about....10 times), ran around using every single object that we could find as an obstacle to climb over, under, through, etc...
And at the end of it all, we jumped into Lake Ontario with all of our uniform on. Boots and all. My Section Commander almost lost his position because of it, actually.