His achievements in bouldering and sport climbing have been pushing the standards of the sport for the last ten years at least .
Chris Sharma , the 31 year old American sport climber , is perhaps the most famous rock climber in the world .
Chris Sharma 's achievements in bouldering and sport climbing have been pushing the standards of the sport for the last ten years at least .
Chris Sharma , the 31 year old American sport climber , is perhaps the most famous rock climber in the world .