opti · Spine Biomechanics
The Spine Lever Lab
Adjust posture and load — watch the spinal force update in real time
⚙ Controls
Forward lean
0°
Head forward
0 cm
Weight held
0 kg
Weight distance
10 cm
Presets
Upright
Slouched
Head fwd
Bag carry
Heavy lift
↺ Reset to Upright
0 kg
L5/S1
Gravity
✓ Upright
Muscle: low
Disc: normal
📊 Spinal Load
~80
kg equivalent
Normal standing load
vs. upright baseline
80 kg
1000 kg
Head: 5 kg × 0 cm
Trunk: 40 kg × 0 cm
Weight: 0 kg × 10 cm
≈ 80 kg total
Muscle tension
15%
Disc compression
Low pressure
⚠ High spinal load — avoid sustained posture
In upright posture the spine carries its natural load efficiently.