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).
If this is something you did before you were a runner, then now's a good time to stop that habit. A marathon, by definition, is a 26.2 mile race. So only races that are 26.2 miles should be called marathons. A half marathon race is 13.1 miles. Other races are also named by their distances, such as a 5K race (3.1 miles) and a 10K race (6.2 miles).