Publications
Myotonometric assessment of peroneus longus muscle mechanical properties during contraction in athletes with and without chronic ankle instability
Authors: Wojciech Stefaniak 1, Jaroslaw Marusiak 1, 2, Dawid Baczkowicz 1
Affiliations:
- Faculty of Physical Education and Physiotherapy, Opole University of Technology, ul. Proszkowska 76, 45-758 Opole, Poland
- Department of Kinesiology, Faculty of Physiotherapy, Wroclaw University of Health and Sport Science, al. I.J. Paderewskiego 35 (building P4), 51-612 Wroclaw, Poland
Journal: Journal of Biomechanics - November 2024, Volume 176, Article no. 112308 (DOI: 10.1016/j.jbiomech.2024.112308)
-
Field & Applications:
- Sport
- Medical
- Musculoskeletal disorder
- Recovery from injury
Our recent findings in athletes with chronic ankle instability (CAI) revealed increased tone and stiffness alongside reduced elasticity in the peroneus longus (PL) during myotonometric (MYO) measurements at rest, suggesting diagnostic relevance. MYO recordings during muscle contraction in healthy subjects showed an active muscle stiffness influence on MYO parameters, suggesting its potential impact on CAI-related MYO findings. However, it remains unknown whether PL stiffening observed recently in CAI athletes at rest can also be detected while PL muscle contraction.
This study, using myotonometry, examines the PL mechanical properties during a motor task mimicking PL’s biomechanical function, i.e., simultaneous isometric foot pronation and plantar flexion (IFPPF) at 30 % and 100 % of maximal voluntary contraction (MVC) in athletes with CAI.
Nineteen adult male athletes with CAI (per International Ankle Consortium criteria) and 19 control (CO) athletes without lateral ankle sprain incidents comprised the study groups. Both groups had similar anthropometric parameters and training volume. Simultaneous force and MYO measurements were performed at 30 % and 100 % of MVC-IFPPF, using a MyotonPRO® device. Five MYO parameters were recorded in the PL: frequency, stiffness, decrement, relaxation time, and creep.
No significant inter-group differences were observed in MYO parameters and force values measured during the 30 % and 100 % of MVC-IFPPF.
This study, employing myotonometry, is the first to demonstrate the lack of significant differences between CAI and CO athletes in the MYO parameters measured in the PL muscle at submaximal and maximal contraction during simultaneous IFPPF, contrasting with our previous MYO results in CAI at rest.
Keywords: chronic ankle instability, athletes, peroneus longus, myotonometry, muscle mechanical properties
Myotonometry revealed no significant differences between the CAI and CO athletes in any of the MYO parameters measured on the PL muscle, either at 30 % or 100 % of maximal voluntary contraction in a task involving simultaneous isometric foot pronation and plantar flexion.