Comparative study of anterior support ankle foot orthosis and posterior ankle foot orthosis in foot drop patients


  • Harleen Uppal Department of Physical Medicine and Rehabilitation, All India Institute of Medical Sciences, New Delhi, India
  • Gita Handa Department of Physical Medicine and Rehabilitation, All India Institute of Medical Sciences, New Delhi, India
  • U. Singh Department of Physical Medicine and Rehabilitation, All India Institute of Medical Sciences, New Delhi, India
  • Sanjay Wadhwa Department of Physical Medicine and Rehabilitation, All India Institute of Medical Sciences, New Delhi, India
  • S. L. Yadav Department of Physical Medicine and Rehabilitation, All India Institute of Medical Sciences, New Delhi, India



Ankle foot orthosis, Energy consumption, Foot drop, Gait analysis, Metabolic equivalent, Orthotic devices


Background: Anterior Support Ankle Foot Orthosis (A-AFO) is a fairly recent approach. There is dearth of studies relating to comparison of metabolic efficiency of A-AFO and P-AFO. Objective was to study the efficacy of A-AFO compared to P-AFO in foot drop patients, using gait and metabolic analysis.

Methods: It was a cross over study, included foot drop patients who could walk with/ without orthosis. Patients having spasticity more than grade 2 (Modified Ashworth Scale) were excluded. The metabolic parameters measured were volume of Oxygen consumed at Standard Temperature and Pressure in l/min (VO2), Dry in l/min, Rate of Oxygen consumption (MET), Volume of Carbon dioxide produced in litre/min (VCO2). Along with various gait parameters, questionnaire about patient’s preference after 4 weeks was also incorporated.

Results: A-AFO was significantly better than P-AFO in terms of VO2 and VCO2 (p value = 0.02 and 0.009 respectively) as well as in terms of subjective preference.

Conclusions: A-AFO is comparable to P-AFO in terms of energy efficiency, gait parameters and subjective preference, hence should also be prescribed.


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