Climate and Sport: The Invisible Rival Always on the Field When we watch an exciting match or a finishing sprint on the Olympic distance, we see athletes, coaches, stadiums, and fans. But there is another participant in any competition that is often forgotten. It is the climate. It is always there. It determines where you can run and where you can play football, it affects the result of the match, the health of the athletes, and which sport will become popular in a particular country. In the 21st century, as climate change becomes more noticeable, the connection between weather and sport comes to the forefront. It's not just about "hot or cold." It's about the survival of a sport, about adaptation, about new records and new risks. How Climate Affects the Physiology of an Athlete The human body is a complex thermoregulation system. At rest, it maintains a temperature of about 36.6 degrees, but during intense exercise, the internal temperature can rise to 39–40 degrees. In hot and humid climates, cooling mechanisms work at their limit. Sweat evaporates poorly, and the body cannot release excess heat. This leads to a decrease in work capacity, dizziness, cramps, and in severe cases, heatstroke. Studies show that at temperatures above 25 degrees and high humidity, the productivity of long-distance runners decreases by 5–10 percent. At 30 degrees and humidity of 80%, even a well-prepared athlete feels like their speed has dropped by 15–20 percent. This is not psychology — it's physics. Muscles work worse, the heart has a harder time pumping blood, the brain receives less oxygen. In cold climates, there are other challenges. Muscles become stiffer in the cold, increasing the risk of injuries. Breathing cold air can cause bronchospasm. But at the same time, the body releases heat more easily in cold weather, and endurance can be higher than in the heat. That's why many world records in athletics are set in moderately cool weather — around 15 degrees, when there is ne ... Read more