Quadriceps, Glutes, Lower Back, Upper Back
Abdominals, Biceps, Calves, Forearms, Hamstrings, Middle Back, Shoulders, Traps, Core
Stand over sandbag.
Squat, wrap arms around bag.
Lift bag using legs/back, pull into lap.
Readjust grip high on bag.
Explosively extend hips/knees.
Load bag onto platform.
Repeat.