Approximate load on L3 Disc in a 70Kg individual:

·         Lying flat on back = 30kg

·         Standing = 70kg

·         Walking = 85kg

·         Upright sitting = 100kg

·         Coughing = 110kg

·         Jumping = 110kg

·         Straining = 120kg

·         Laughing = 120kg

·         Bending forward 20o = 120kg

·         Bent knee sit-ups = 180kg

·         Lifting 20kg with back straight and knees bent = 210kg

·         Lifting 20kg with back bent and knees straight = 340kg

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