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Normative data for passive ankle plantarflexion--dorsiflexion flexibility.

A M Moseley¹, J Crosbie, R Adams

¹Rehabilitation Studies Unit, Department of Medicine, University of Sydney, Royal Rehabilitation Centre, Sydney, P.O. Box 6, Ryde, NSW 1680, Australia. amoseley@mail.usyd.edu.au

Clinical Biomechanics (Bristol, Avon)

|June 28, 2001

Summary

This study establishes normal ankle flexibility values for young adults, providing crucial data for clinical assessments of plantarflexion contracture. The findings confirm normal distribution for key flexibility measures.

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Area of Science:

Biomechanics
Kinesiology
Clinical Assessment

Background:

Plantarflexion-dorsiflexion flexibility is vital for clinical evaluation of plantarflexion contracture.
Limited normative data exists for this flexibility measure, hindering clinical decision-making.

Purpose of the Study:

To determine normal distribution parameters for passive ankle plantarflexion-dorsiflexion flexibility.
To establish a normative database for able-bodied young adults.

Main Methods:

Collected data from 300 healthy individuals aged 15-34 years.
Measured passive torque, stiffness, and range of motion using an instrumented footplate and clinical procedures.
Analyzed load-displacement curves to extract six variables and quantified passive dorsiflexion range of motion.

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Main Results:

Flexibility measures showed no significant differences between left/right ankles or dominant/non-dominant legs.
All assessed flexibility variables exhibited a normal distribution.
Mean and standard deviation adequately describe the distribution of these variables.

Conclusions:

This research significantly expands the normative database for ankle flexibility.
The findings provide a foundation for developing norm-referenced clinical tests.
The established parameters aid in objective clinical assessment and decision-making.