Load Type Compression load in kg
Supine position 30
Standing 70
Walking 85
Turning 90
Lateral Flexion 95
Sitting upright without an arm rest 100
Isometric Exercise of the abdominal muscles 110
Coughing or hopping 110
Prevented or on the side of turned sitting (occupation bearing) 120
Forwards bending of the back muscles over a book 120
Over stretching of the back muscles in prone position like a surfer 150
Sitting up from the supine position 175 - 180
Lifting of 20 kg with bent back and straight knees 340