Caucasian man doing sit-ups on fitness ball in field near tree

25 29 years authentic authenticity ball beauty in nature branch brunette california candid caucasian color image copy space countryside day environment exercise exercise mat fence field fitness fitness ball grass healthy living horizontal landscape lifestyle los angeles man millennial millennials nature one person outdoors people photography physical fitness real life real people remote rolling landscape rural scene scenic view sit up sitting sportswear sunny travel travel destinations tree united states workout yoga mat young adult young men 20 25 20 30 20's 20s 25 30 activity adult america american americas apparel barrier beauty bough brown hair ca clothes clothing color colour daylight daytime exercising exertion fellow garment gentleman guy health human human being la la limb male natural negative space north america one outdoor outside person plant rural scenics seated self improvement sunlight sunshine twenties twenty us usa united states of america us usa vegetation wall west coast western european white space