a photo taken on a muscle hand gripper strengthener white backdrop

backdrop background black bodies body bodybuilding build building close closed compress compressing crush crushing equipment exercise exercising fit fitted foam grip gripper grippers hand handle handled handles hands hard isolated muscle muscles open opened pad pads pair pairs palm palms photo position positions press pressing product self sinew sinewy soft sport sports spring springs strength strengthener strong strongman strongmen tone toning torque torsion torsional train trainer trainers training trainings twin two white