A row of runners womens crouch in the starting position before beginning to race

start runner female sprint race line energy track and field starting line running track medium group of people sports race stadium track and field athlete women competition only women people group of people slow motion sprint competitions women athletes young sports motion mixed race track event sports track track starting block speed womens track young women healthy lifestyle challenge strength night professional occupation side view determination leisure activity beginnings rivalry passion in a row caucasian ethnicity back lit effort concentration leaning lens flare