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The human movement laboratory

Isokinetic dynamometer

The isokinetic dynamometer (Biodex System 3 PRO) provides a useful method for performance testing and rehabilitation methods for the ankle, knee, hip, wrist, elbow and shoulder. The modes of operation for exercise and testing include isokinetic, passive, isometric, isotonic and reactive eccentric. Biofeedback is provided during each assessment.

The isokinetic dynamometer can measure net muscle torque for the following movements:

  • Ankle (plantar flexion/dorsiflexion; inversion/eversion)
  • Knee (flexion/extension)
  • Hip (flexion/extension)
  • Wrist (flexion/extension; pronation/supination)
  • Elbow (flexion/extension)
  • Shoulder (flexion/extension; abduction/adduction; internal/external rotation)


Biodex System 3 PRO isokinetic dynamometer (Biodex Medical Inc., Shirley, NY, USA)

Multi-Mode operation: Isokinetic, Isometric, Isotonic, Reactive Eccentric and Passive
Concentric speed up to 500 deg/sec
Eccentric speed up to 300 deg/sec
Concentric torque up to 680 Nm
Eccentric torque up to 444 Nm
Passive speed as low as 0.25 deg/sec
- Passive torque as low as 0.7 Nm
- Isotonic torque as low as 0.7 Nm

Clinical Data Station:
Windows 98 or XP Operating System
Biodex Advantage Software

Attachments for Ankle, Knee, Shoulder, Elbow, Wrist and Hip

Dynamometer Performance Specifications
Torque accuracy is +/- 1% of full scale
Position range is 330 degrees
Position accuracy is +/- 1 degree of rotation

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Isokinetic dynamometer