Woman working out on a treadmill; Wellington, New Zealand

female girl confidence confident focus achievement fitness exercise women challenge caucasian workout fit color colour strength motion activity active muscle movement running training gym conditioning exertion facility concentration discipline equipment serious accomplishment standing person ambition core muscles jogging athletics females exercising treadmill toning facilities exerting side view looking away young woman young women role model working out pony tail cardio cardiovascular healthy lifestyle one person workouts self assured beauty adults adult indoors vertical people woman health blonde blond run strengthening gyms inside healthiness health and wellness health & wellness blonde hair physical fitness color image role models young adult young adults blond hair caucasian ethnicity focus on foreground physical activity muscle building body building muscle tone positive attitude colour image waist up treadmills active wear workout clothing 20 24 years workout clothes personal development core strength half length strength exercise strength exercises