However, extreme summer temperatures are among the top concerns for Olympic athletes and their trainers, who have had to find some creative ways to prepare. Members of Canada's women's eight rowing team lose about three to four litres of sweat during a 90-minute heat training session. (Dan Batchelor)Since individuals deal slightly differently with heat, Pethick and her colleagues move around the room, checking in with each athlete to gauge their condition. The athletes are asked to swallow it a few hours in advance of their training session, and it transmits data about their internal body temperature. It's a lesson summer athletes will likely need to heed into the future, as rising temperatures mean Summer Games could be increasingly hot in many parts of the world.

Source: CBC News July 13, 2021 14:00 UTC