Cybex Isokinetic Testing

Cybex testing is a specialised strength and movement assessment used to measure muscle performance with exceptional precision. It allows us to objectively evaluate muscular strength, power, endurance, and imbalances to guide rehabilitation and return-to-sport decisions.

The system uses an isokinetic dynamometer — an advanced machine that maintains a constant movement speed regardless of how much force the patient produces. This ensures controlled, safe, and maximal muscle loading throughout the entire range of motion.

Unlike traditional gym equipment, Cybex testing provides measurable, scientific data rather than subjective estimation.

01.

Isokinetic Measurement
The Cybex machine adjusts resistance in real time to match the patient’s effort, while maintaining a preset movement speed.

How the Cybex Works

This allows:

  • Maximum muscle activation at every point of the range of motion
  • Safe and controlled loading
  • Reduced joint stress
  • Accurate performance measurement

Testing can be performed at different angular velocities depending on the rehabilitation stage or performance goal.

Identifying Muscle Imbalances

One of the most valuable features of Cybex testing is its ability to detect asymmetries and deficits.

We analyse:

  • Injured vs. uninjured limb strength
  • Quadriceps-to-hamstring ratios
  • Agonist vs. antagonist muscle balance
  • Side-to-side differences (Limb Symmetry Index – LSI)

This allows precise identification of weaknesses that may contribute to injury risk or delayed recovery.

Objective, Scientific Reporting

The Cybex software generates detailed reports including:

  • Peak torque
  • Average power
  • Total work
  • Fatigue index
  • Strength curves across range of motion

These objective measurements remove guesswork from rehabilitation and provide measurable progress tracking.

Key Benefits of Cybex Testing

Injury Prevention

By identifying specific muscular imbalances — such as poor hamstring-to-quadriceps ratios — we can design targeted programmes to reduce the risk of:

  • ACL injuries
  • Hamstring strains
  • Overuse syndromes
  • Recurrent joint instability

Safe Rehabilitation

The Cybex offers multiple safe testing and training modes:

  • Isokinetic
  • Isometric
  • Eccentric
  • Passive range-of-motion

This makes it ideal for:

  • Early post-operative rehabilitation
  • Controlled strengthening
  • Joint protection during recovery
  • Progressive load management

Return-to-Sport Decision Making

Cybex testing is widely considered a gold standard for return-to-play criteria.

Athletes are often required to demonstrate:

  • ≥ 90% strength symmetry
  • Balanced muscle ratios
  • Adequate endurance capacity

Objective data supports informed decisions by:

  • Surgeons
  • Biokineticists
  • Physiotherapists
  • Coaches
  • Strength & conditioning professionals
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By identifying specific muscular imbalances — such as poor hamstring-to-quadriceps ratios — we can design targeted programmes to reduce the risk of:

02.

More Info on Cybex

Why Objective Testing Matters
Without measurable data, rehabilitation may rely on subjective feel rather than evidence. Cybex testing allows us to:

Who Should Consider Cybex Testing?

What to Expect During a Session

 

  • Clinical screening and warm-up
  • Explanation of testing protocol
  • Supervised strength testing at set speeds
  • Immediate data analysis
  • Comprehensive feedback session

Testing is safe, controlled, and tailored to your rehabilitation stage.

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