13 Apr 2026

Force Diagrams

Lever mechanics for each major muscle group, generated from analysis of 1,619 exercises. Each diagram shows the joint as a fulcrum, the muscle insertion as the effort arm, and the load position as the resistance arm.

Biceps curl force diagram
Biceps Curl5:1 lever ratio · elbow joint
Chest bench press force diagram
Chest — Bench Press6:1 lever ratio · shoulder joint
Back lats cable row force diagram
Back — Cable Row9:1 lever ratio · shoulder joint
Shoulders lateral raise force diagram
Shoulders — Lateral Raise20:1 lever ratio · shoulder joint
Quads barbell squat force diagram
Quadriceps — Barbell Squat5:1 lever ratio · knee joint
Hamstrings leg curl force diagram
Hamstrings — Leg Curl10:1 lever ratio · knee & hip joints
Lower back deadlift force diagram
Lower Back — Deadlift10:1 lever ratio · lumbar spine
Triceps overhead extension force diagram
Triceps — Overhead Extension10:1 lever ratio · elbow joint
Calves calf raise force diagram
Calves — Calf Raise2:1 lever ratio · ankle joint
Forearms wrist curl force diagram
Forearms — Wrist Curl7:1 lever ratio · wrist joint
Abdominals crunch force diagram
Abdominals — Crunch7–8:1 lever ratio · lumbar spine

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