KRASNAYA POLYANA, Russia (AP) — U.S. bobsled driver Steven Holcomb ran a little harder on an injured calf and is confident he’ll be close to full speed for the four-man competition.

Holcomb is trying to win a second consecutive gold medal in four-man, which begins with two heats Saturday. Holcomb said his strained calf muscle is “about 75 percent” and he pushed harder at the start of two training runs with his three-man USA-1 crew.