Cargando…
Reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex
The reliability of mechanical measures can be impacted by the protocol used, including factors such as joint angle and the sex of participants. This study aimed to determine the inter-day reliability of plantar flexor mechanical measures across ankle joint angles and contraction types and consider p...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2023
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10289375/ https://www.ncbi.nlm.nih.gov/pubmed/37352329 http://dx.doi.org/10.1371/journal.pone.0287431 |
_version_ | 1785062263490609152 |
---|---|
author | Crotty, Evan D. Furlong, Laura-Anne M. Harrison, Andrew J. |
author_facet | Crotty, Evan D. Furlong, Laura-Anne M. Harrison, Andrew J. |
author_sort | Crotty, Evan D. |
collection | PubMed |
description | The reliability of mechanical measures can be impacted by the protocol used, including factors such as joint angle and the sex of participants. This study aimed to determine the inter-day reliability of plantar flexor mechanical measures across ankle joint angles and contraction types and consider potential sex-specific effects. 14 physically-active individuals participated in two identical measurement sessions involving involuntary and voluntary plantar flexor contractions, at three ankle angles (10° plantarflexion (PF), 0° (anatomical zero (AZ)), and 10° dorsiflexion (DF)), while torque and surface EMG were recorded. The reliability of mechanical parameters of maximal voluntary torque (MVT), rate of torque development (RTD), electromechanical delay, and tendon stiffness were assessed using absolute and relative reliability measures. MVT measures were reliable across ankle angles. RTD measures showed good group level reliability and moderate reliability for an individual during the early phase of contraction across ankle angles. Explosive voluntary torque measures tended to be less reliable from 50 ms onward, with varied reliability across angles for late-phase RTD. Tendon stiffness demonstrated the best reliability at the DF angle. Sex-based differences in the reliability of tendon measures found that females had significantly different initial tendon length between testing sessions. Despite this, tendon excursion, force, and stiffness measures demonstrated similar reliability compared to males. Ankle angle changes influence the reliability of plantar flexor mechanical measurements across contraction types, particularly for voluntary contractions. These results highlight the importance of establishing potential protocol effects on measurement reliability prior to quantifying plantar flexor mechanical measures. |
format | Online Article Text |
id | pubmed-10289375 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-102893752023-06-24 Reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex Crotty, Evan D. Furlong, Laura-Anne M. Harrison, Andrew J. PLoS One Research Article The reliability of mechanical measures can be impacted by the protocol used, including factors such as joint angle and the sex of participants. This study aimed to determine the inter-day reliability of plantar flexor mechanical measures across ankle joint angles and contraction types and consider potential sex-specific effects. 14 physically-active individuals participated in two identical measurement sessions involving involuntary and voluntary plantar flexor contractions, at three ankle angles (10° plantarflexion (PF), 0° (anatomical zero (AZ)), and 10° dorsiflexion (DF)), while torque and surface EMG were recorded. The reliability of mechanical parameters of maximal voluntary torque (MVT), rate of torque development (RTD), electromechanical delay, and tendon stiffness were assessed using absolute and relative reliability measures. MVT measures were reliable across ankle angles. RTD measures showed good group level reliability and moderate reliability for an individual during the early phase of contraction across ankle angles. Explosive voluntary torque measures tended to be less reliable from 50 ms onward, with varied reliability across angles for late-phase RTD. Tendon stiffness demonstrated the best reliability at the DF angle. Sex-based differences in the reliability of tendon measures found that females had significantly different initial tendon length between testing sessions. Despite this, tendon excursion, force, and stiffness measures demonstrated similar reliability compared to males. Ankle angle changes influence the reliability of plantar flexor mechanical measurements across contraction types, particularly for voluntary contractions. These results highlight the importance of establishing potential protocol effects on measurement reliability prior to quantifying plantar flexor mechanical measures. Public Library of Science 2023-06-23 /pmc/articles/PMC10289375/ /pubmed/37352329 http://dx.doi.org/10.1371/journal.pone.0287431 Text en © 2023 Crotty et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Crotty, Evan D. Furlong, Laura-Anne M. Harrison, Andrew J. Reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex |
title | Reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex |
title_full | Reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex |
title_fullStr | Reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex |
title_full_unstemmed | Reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex |
title_short | Reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex |
title_sort | reliability of mechanical properties of the plantar flexor muscle tendon unit with consideration to joint angle and sex |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10289375/ https://www.ncbi.nlm.nih.gov/pubmed/37352329 http://dx.doi.org/10.1371/journal.pone.0287431 |
work_keys_str_mv | AT crottyevand reliabilityofmechanicalpropertiesoftheplantarflexormuscletendonunitwithconsiderationtojointangleandsex AT furlonglauraannem reliabilityofmechanicalpropertiesoftheplantarflexormuscletendonunitwithconsiderationtojointangleandsex AT harrisonandrewj reliabilityofmechanicalpropertiesoftheplantarflexormuscletendonunitwithconsiderationtojointangleandsex |