happy teenage girl poses in sports top with starting number in studio with white background

abdomen adult arm athlete athletic athletics background belly black blond briefs clothing competition fitness fun girl gym hair hairstyle happy isolated jogger jogging joy limb longhair marathon muscle neck number pink ponytail poses posing pretty runner schoolgirl slim smiling sport sports sportsbra sportstop sportswear sporty starting startingnumber studio teen teenage teenager thigh top training undefined wear white youth