Unlike other sliding sports of bobsleigh and luge, the race always involves single riders. Like bobsleigh, but unlike luge, the race begins with a running start from the opening gate at the top of the course. The skeleton sled is thinner and heavier than the luge sled, and skeleton affords the rider more precise control of the sled. Skeleton is the slowest of the three sliding sports, as skeleton's face-down, head-first riding position is less aerodynamic than luge's face-up, feet-first ride.