Interesting possibilities ... only wouldn't the g-forces kill off the obese epoplel before they get to the pool? And wouldn't gravity provide better resistance for boxers?
I think I'd love this option when I'm pregnant, though!
Swings, they have swings which drop them in the pool.
I'm an equal opportunity exporter. If a fat guy wants to take his chances on "The South Polar Express" and pays his fare, who am I to argue? Remember "The Man Who Sold The Moon" and where he died?
People will die in space. Sometimes even healthy ones. If they had their heart, weak as it may have been, set on going to Mars, I say take them all the way! Easy enough to put them on ice if need be.
And for boxers -- somehow I think the "Sweet Sport" is not going to make it off the planet. It's just too stupid to imagine. However, once the Martian Colonists get settled in, I have little doubt that some form of "Wrassling" will enjoy a resurgence of popularity, especially in four-tenths gravity.
Initial launch forces would be contra-indicated for anyone too pregnant. But if you time it right, giving birth before, or just after arrival (Martian Citizenship!), then I think it would be more comfortable.