You'd think they might want to save their energy.
But it seems that Olympic athletes will be working up more of a sweat off the field than they will on it this Summer.
In a sign of what the world's fittest sportsmen and women get up to in the Olympic village, a record 150,000 free condoms - 15 for each competitor - have been made available to them.
It works out at nearly 15 each for the 10,500 competitors taking part in the Games, with Durex ready to deliver more if the sports stars exhaust their ration.
They will, of course, be able to take a trip to the nearest chemist if they run out.
If sexual appetites among are as voracious as former Olympians have suggested, they're going to need every last one of the condoms provided.
Women's football goalkeeper Hope Solo told the Daily Mirror: 'There's a lot of sex going on at the Olympics.