Runners from around the world are getting ready to take part in the 33rd annual London Marathon Sunday, and many of them are keeping an eye on the forecast.
Weather plays a large role in outdoor sporting events. Hot, muggy conditions can slow down even the most elite athlete, while research suggests that cold weather accelerates fatigue.
Participants say that cloudy and dry conditions are best, and research has (somewhat) confirmed this.
According to Al Jazeera News Network, research demonstrates that male athletes are at the top of their game when the temperature is between 10 and 13°C.
Females do well when the temperature is between 11 and 14°C.
London Marathon runners may be in luck. Sunday's high is expected to be 15°C, with a low of 7°C. So far, the forecast isn't calling for rain.
More than 36,000 people are expected to take place in this weekend's marathon.
To date, runners have raised more than $775 million (CAD) for charity.