Answer
Bend at the knees, keep his back straight and lift with his legs
Step-by-step explanation
Proper lifting procedures helps one to be safe and prevents back injuries when lifting something especially a heavy one. Safe lifting techniques are simple but effective.One needs to Stand close to the object, with your feet shoulder-width apart and your toes naturally pointed outward. Squat down next to the object by bending at your knees and hips It is advisable not to lift from a standing position with your waist bent or your knees locked.