The May 2002 issue of Gentleman's Quarterly featured this guy who is listed by Guinness as the World's Fittest Man. He is age 32, 5' 9" tall, weighs 185 lbs. Here is what he did:

Cycled 100 miles

Ran 10 miles

Hiked 10 miles

Power-walked 5 miles

Kayaked 6 miles

Nordic Tracked 10 miles

Rowed 10 miles

Swam 2 miles

3000 crunches

1100 pushups

1100 jumping jacks

1000 leg lifts

Lifted over 278,000 lbs.

All in 24 hours!