How to use this calculator
- Test the uninjured side first, then the injured side, the same way.
- Enter the results.
- See the symmetry percentage.
How it works
Limb symmetry index = injured side / uninjured side x 100. Return-to-sport criteria commonly require 90% or more on strength and hop tests, alongside good movement quality and confidence.
Reading your result
| 90% or more | Meets criteria |
|---|---|
| 80 to 89% | Close |
| Under 80% | Significant deficit |
Physiotherapy treatment
Strength comparison and rehabilitation monitoring is the core of physiotherapy for lower limb injury. After an assessment, your physiotherapist sets a plan built around unilateral strengthening and progressive functional drills, progressed as your results improve. Hands-on treatment, pain relief and education are added where they help.
Exercises this calculator may recommend
Your result decides which of these appear, and at what dose.
Medical note
Calculators give estimates for general guidance and do not diagnose any condition. Stop and seek medical help for chest pain, fainting, sudden weakness or numbness, loss of bladder or bowel control, or severe or rapidly worsening pain. Always follow your surgeon's or doctor's instructions over any calculator.