Shirtless muscular man jumping on top of the gym box while attempting a crossfit challenge

shirtless man fitness jump box jumping muscular male crossfit challenge muscular man fitness person beard open air working out fit jumping squats cross caucasian sportsman buttocks active people burning calories exercise gym workout training strong sport motivation body athlete strength sporty slow motion bodyweight wooden box warmup trainer sportswear professional occupation muscular build leisure activity legs determination no shirt muscles indoor inside