Rear view of three male cross trainers throwing exercise balls in gym

Two male cross trainers doing chin ups on exercise bar in gym

Side view of man in gym doing push ups

Young male runner doing push ups on bench in city square

Two male cross trainers training on exercise bar in gym

Two young male cross trainers doing handstands against gym wall

Young male cross trainer skipping outside gym

Young male cross trainer weightlifting kettlebell in gym

Young male cross trainer doing handstand in gym

Young male cross trainer weightlifting barbell in gym

Young male cross trainer weightlifting kettlebell in gym

Young male cross trainer weightlifting barbell outside gym

Portrait of three people in gym

Thermal image of young male athlete doing push ups. The image shows the heat produced by the muscles

Mature man doing push ups against park bench in forest

Man and woman doing pull ups in crossfit gym

Cropped shot of three male college students in bricklaying workshop

An exercise class

Low angle view of dedicated men doing chin-ups in crossfit gym

Man exercising at gym

Young people at a gym

Mid adult male boxer practicing in gym

Curvaceous young woman training, doing wall push ups

Mid adult male boxer training in gym

Three male cross trainers doing side push ups in gym