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Barnett, CT, De Asha, AR, Skervin, TK, Buckley, JG and Foster, RJ (2022) Spring-mass behavioural adaptations to acute changes in prosthetic blade stiffness during submaximal running in unilateral transtibial prosthesis users. Gait and Posture, 98. pp. 153-159. ISSN 0966-6362
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Barnett et al (2022) Spring-mass behavioural adaptations to acute changes in prosthetic blade stiffness during submaximal running in UTAs.pdf - Published Version Available under License Creative Commons Attribution Non-commercial No Derivatives. Download (1MB) | Preview |
Abstract
Background: Individuals with lower-limb amputation can use running specific prostheses (RSP) that store and then return elastic energy during stance. However, it is unclear whether varying the stiffness category of the same RSP affects spring-mass behaviour during self-selected, submaximal speed running in individuals with unilateral transtibial amputation. Research question: The current study investigates how varying RSP stiffness affects limb stiffness, running performance, and associated joint kinetics in individuals with a unilateral transtibial amputation. Methods: Kinematic and ground reaction force data were collected from eight males with unilateral transtibial amputation who ran at self-selected submaximal speeds along a 15 m runway in three RSP stiffness conditions; recommended habitual stiffness (HAB) and, following 10-minutes of familiarisation, stiffness categories above (+1) and below (-1) the HAB. Stance-phase centre of mass velocity, contact time, limb stiffness’ and joint/RSP work were computed for each limb across RSP stiffness conditions. Results: With increased RSP stiffness, prosthetic limb stiffness increased, whilst intact limb stiffness decreased slightly (p<0.03). Centre of mass forward velocity during stance-phase (p<0.02) and contact time (p<0.04) were higher in the intact limb and lower in the prosthetic limb but were unaffected by RSP stiffness. Intact limb hip joint positive work increased for both the +1 and -1 conditions but remained unchanged across conditions in the prosthetic limb (p<0.02). Significance: In response to changes in RSP stiffness, there were acute increased mechanical demands on the intact limb, reflecting a reliance on the intact limb during running. However, overall running speed was unaffected, suggesting participants acutely adapted to an RSP of a non-prescribed stiffness.
| Item Type: | Article |
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| Uncontrolled Keywords: | Limb stiffness; Running; Spring-mass model; Unilateral transtibial prosthesis; 0913 Mechanical Engineering; 1103 Clinical Sciences; 1106 Human Movement and Sports Sciences; Orthopedics |
| Subjects: | Q Science > QM Human anatomy R Medicine > R Medicine (General) R Medicine > RC Internal medicine > RC1200 Sports Medicine |
| Divisions: | Sport & Exercise Sciences |
| Publisher: | Elsevier BV |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 10 Nov 2022 11:30 |
| Last Modified: | 10 Nov 2022 11:30 |
| DOI or ID number: | 10.1016/j.gaitpost.2022.09.008 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/18092 |
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