Variations of ankle-foot orthosis-constrained movements increase ankle range of movement while maintaining power output of recumbent cycling

Hamdan, Puteri N.F. and Hamzaid, Nur Azah and Usman, Juliana and Islam, Md Anamul and Kean, Victor Shern Phng and Wahab, Ahmad Khairi Abdul and Hasnan, Nazirah and Davis, Glen Macartney (2018) Variations of ankle-foot orthosis-constrained movements increase ankle range of movement while maintaining power output of recumbent cycling. Biomedical Engineering / Biomedizinische Technik, 63 (6). pp. 691-697. ISSN 0013-5585

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Official URL: https://doi.org/10.1515/bmt-2017-0004

Abstract

Previous research investigated recumbent cycle power output (PO) from the perspective of knee and hip joint biomechanics. However, ankle-foot biomechanics and, in particular, the effect of ankle-foot orthosis (AFO)-constrained movements on cycle PO has not been widely explored. Therefore, the purpose of this study was to determine whether AFOs of a fixed position (FP) and in dorsi-plantarflexion (DPF)-, dorsiflexion (DF)- and plantarflexion (PF)-constrained movements might influence PO during voluntary recumbent cycling exercises. Twenty-five healthy individuals participated in this study. All underwent 1-min cycling at a fixed cadence for each of the AFOs. The peak and average PO of each condition were analyzed. The peak and average PO were 27.2±12.0 W (range 6-60) and 17.2±9.0 W (range 2-36), respectively, during voluntary cycling. There were no significant differences in the peak PO generated by the AFOs (p=0.083). There were also no significant differences in the average PO generated using different AFOs (p=0.063). There were no significant differences in the changes of the hip and knee joint angles with different AFOs (p=0.974 and p=1.00, respectively). However, there was a significant difference in the changes of the ankle joint angle (p<0.00). The present study observed that AFO-constrained movements did not have an influence in altering PO during voluntary recumbent cycling in healthy individuals. This finding might serve as a reference for future rehabilitative cycling protocols.

Item Type: Article
Uncontrolled Keywords: ankle-foot orthosis; ankle movement; pedal power output; rehabilitation exercise; voluntary recumbent cycling
Subjects: R Medicine
Divisions: Faculty of Engineering
Faculty of Medicine
Depositing User: Ms. Juhaida Abd Rahim
Date Deposited: 20 Aug 2019 03:48
Last Modified: 20 Aug 2019 03:48
URI: http://eprints.um.edu.my/id/eprint/21968

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