Caucasian runner in starting position on sports field

25 29 years authentic authenticity caucasian color image copy space determination exercise field fitness focus on foreground front view full length health looking up missouri night one person outdoors people photography physical fitness real people runner saint louis sports sportswear starting position stretching track & field united states vertical woman working out young adult young women millennial20 25 20 30 20's 20s 25 30 activity adult after dark america american americas apparel clothes clothing color colour dark dedication evening exercising exertion female fortitude full body full length gal garment hardy healthy human human being lady mid west mo negative space nightfall nighttime nite north america one outdoor outside persistence person resolution self improvement sport track and field track event twenties twenty us usa united states of america us usa vitality well being western european white space women work out workout