Vitality, Action, Strength, Concentration, Determination, Routine, People, 20-29 Years, 20's, 30's, 30-39 Years, Adults, Beauty, Beautiful People, Attractive, Bijin, Caucasian Ethnicity, Caucasian Appearance, Females, One Woman Only, One Young Woman Only, Only Women, Long black hair, Long Hair, Long haired, Long Brown hair, Long brunette hair, One person, Solitary person, Single person, Healthy Lifestyle, Newhealth, Health2010, Leisure Activity, Recreational Pursuit, Hands Behind Head, Hands clasped together, Sit-ups, Crunches, Sports Training, Exercising, Exercise, Sports Clothing, Sport, Blurred Motion, Movement, Blur, Serious, Horizontal, Color Image, Photography, Studio Shot, Gray background, Profile view, Side view, Exposed midriff, Body Conscious, Looking Away, Aerobics, Three Quarter Length, 3/4 Length