Sandbag All-Fours Drag

Get down on all fours (hands and feet) with sandbag in front of you. Grab sandbag with right hand, drag it toward you as far as possilbe. Move back on all fours, grab bag with left hand and drag it towards you as far as possible. Move back on all fours. Repeat for 30 ft. 40# for women, 60# for men.