Mixed Race woman doing sit-up on floor at gymnasium

20 24 years abs accomplishment aerobics african american ethnicity authentic authenticity brunette challenge color image concentrating copy space core exercise fitness floor focusing goal gymnasium hands behind head health health club healthy living horizontal indoors jersey city lifestyle looking up millennial millennials mixed race person muscle new jersey one person people photography physical fitness power profile real people routine serious short hair side view sit up sportswear strength three quarter length tone trainer united states weights woman working out workout young young adult young women minority minorities grit20 25 20 30 20's 20s 25 30 activity adult african african american african ethnicity african american afro american afro american america american americas apparel behind black brown hair challenging clothes clothing color colour concentration demanding east coast energy exercising exertion female fitness center focussing gal garment gym hair hand hardy healthy human human being indoor inside lady mixed race muscular negative space nj north north america northeast of african descent one person powerful self improvement seriousness short side view solemn somber three quarter length twenties twenty us usa united states of america us usa vitality well being white space women work out youth youthful