Lewis Hamilton: Mountaineering
During the offseason, the 2014 F1 season champion and 2015 points leader trades his residence in Monaco for his home in Vail, Colorado, where he hikes and rock climbs in the warmer months and cross-country skis and snowboards in the winter. The regime helps him stay fit — and light enough to meet the weight limit for Formula One cars. "Last year I had to lose six kilos," Hamilton told Men's Health UK in April (or over 13 pounds). "It was hardcore; I didn't have much to lose as it was. So I train a lot."