February is traditionally one of the coldest months of the year, so why not work off some of those pounds in the blistering heat?, Bikram yoga has participants posing and exercising in a room where the temperature is a constant 105 degrees. Bikram Choudhury brought this hot yoga over to america in the 1970s. The exercises are the same Bikram would do outdoors on a summer day in Calcutta. Besides the temperature, the room is elevated to 40 percent humidity. They say for your first time trying it out, your body will take about 30 or 40 minutes to get used to the heat.