Skip trying to simply sweat off the pounds with saunas and sweat suits. For true, lasting weight loss, instead keep your focus on a consistent, balanced workout plan and a healthy diet with the right caloric deficit.
I'm thinking about training for a marathon. A marathon is 26.2 miles or 42 kilometers. Although some marathons differ in their terrain (some are very flat, some are extremely hilly) and degree of difficulty, the distance is always 26.2 miles. Races that are shorter or longer in distance have different names (such as 5K, 10K, half-marathon, or ultra-marathon).
A half-marathon is 13.1 miles, and a standard marathon is 26.2 miles. ANYTHING that is longer than 26.2 miles is considered to be an Ultra-Marathon. They have distances ranging from 50K (31.1 miles) on up to 100 MILES! My first marathon was the 1991 Marine Corps Marathon. 5k run is 5 kilometers (3.11 mi), and a 10k would be 10 Kilometers (6.21 mi). A marathon is 42.195 kilometres (26 miles 385 yards) and a half marathon is 21.0975 kilometers, or 13 7/64 miles, about 13.1 miles.