The effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle

Abstract Stretch-induced residual force enhancement (rFE) is associated with increased performance in a stretch–shortening cycle (SSC). Although the influence of different range of motions and muscle–tendon unit lengths has been investigated in pure stretch-hold experiments in vivo, the contribution...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Martin Groeber, Savvas Stafilidis, Arnold Baca
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/63769f5e458245408a1a9469e0df5aef
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:63769f5e458245408a1a9469e0df5aef
record_format	dspace
spelling	oai:doaj.org-article:63769f5e458245408a1a9469e0df5aef2021-12-02T18:30:45ZThe effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle10.1038/s41598-021-94046-22045-2322https://doaj.org/article/63769f5e458245408a1a9469e0df5aef2021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-94046-2https://doaj.org/toc/2045-2322Abstract Stretch-induced residual force enhancement (rFE) is associated with increased performance in a stretch–shortening cycle (SSC). Although the influence of different range of motions and muscle–tendon unit lengths has been investigated in pure stretch-hold experiments in vivo, the contribution to a SSC movement in human muscles remains unclear. In two sessions, 25 healthy participants performed isometric reference (ISO), shortening hold (SHO) and SSC contractions on an isokinetic dynamometer. We measured the net knee-joint torque, rotational mechanical work, knee kinematics and fascicle behavior (m. vastus lateralis) of the upper right leg. In session 1 the SHO- and SSC-magnitude was changed respectively (SHO: 50°–20°, 80°–20° and 110°–20°; SSC: 20°–50°–20°, 20°–80°–20° and 20°–110°–20°) and in session 2 the muscle–tendon unit length (SHO: 50°–20°, 80°–50° and 110°–80°; SSC: 20°–50°–20°, 50°–80°–50° and 80°–110°–80°; straight leg = 0°). In both sessions, rotational work was significantly (p < 0.05) increased in the SSC compared to the SHO contractions (in the range of 8.1–17.9%). No significant difference of joint torque was found in the steady-state for all SSC-magnitudes compared to the corresponding SHO contractions in session 1. In session 2, we found only significantly (p < 0.05) less depressed joint torque in the SSC at the longest muscle–tendon unit length compared to the corresponding SHO condition, without any differences in knee kinematics and fascicle behavior. Therefore, the physiological relevance of rFE might be particularly important for movements at greater muscle–tendon unit lengths.Martin GroeberSavvas StafilidisArnold BacaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Martin Groeber Savvas Stafilidis Arnold Baca The effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle
description	Abstract Stretch-induced residual force enhancement (rFE) is associated with increased performance in a stretch–shortening cycle (SSC). Although the influence of different range of motions and muscle–tendon unit lengths has been investigated in pure stretch-hold experiments in vivo, the contribution to a SSC movement in human muscles remains unclear. In two sessions, 25 healthy participants performed isometric reference (ISO), shortening hold (SHO) and SSC contractions on an isokinetic dynamometer. We measured the net knee-joint torque, rotational mechanical work, knee kinematics and fascicle behavior (m. vastus lateralis) of the upper right leg. In session 1 the SHO- and SSC-magnitude was changed respectively (SHO: 50°–20°, 80°–20° and 110°–20°; SSC: 20°–50°–20°, 20°–80°–20° and 20°–110°–20°) and in session 2 the muscle–tendon unit length (SHO: 50°–20°, 80°–50° and 110°–80°; SSC: 20°–50°–20°, 50°–80°–50° and 80°–110°–80°; straight leg = 0°). In both sessions, rotational work was significantly (p < 0.05) increased in the SSC compared to the SHO contractions (in the range of 8.1–17.9%). No significant difference of joint torque was found in the steady-state for all SSC-magnitudes compared to the corresponding SHO contractions in session 1. In session 2, we found only significantly (p < 0.05) less depressed joint torque in the SSC at the longest muscle–tendon unit length compared to the corresponding SHO condition, without any differences in knee kinematics and fascicle behavior. Therefore, the physiological relevance of rFE might be particularly important for movements at greater muscle–tendon unit lengths.
format	article
author	Martin Groeber Savvas Stafilidis Arnold Baca
author_facet	Martin Groeber Savvas Stafilidis Arnold Baca
author_sort	Martin Groeber
title	The effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle
title_short	The effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle
title_full	The effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle
title_fullStr	The effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle
title_full_unstemmed	The effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle
title_sort	effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/63769f5e458245408a1a9469e0df5aef
work_keys_str_mv	AT martingroeber theeffectofstretchshorteningmagnitudeandmuscletendonunitlengthonperformanceenhancementinastretchshorteningcycle AT savvasstafilidis theeffectofstretchshorteningmagnitudeandmuscletendonunitlengthonperformanceenhancementinastretchshorteningcycle AT arnoldbaca theeffectofstretchshorteningmagnitudeandmuscletendonunitlengthonperformanceenhancementinastretchshorteningcycle AT martingroeber effectofstretchshorteningmagnitudeandmuscletendonunitlengthonperformanceenhancementinastretchshorteningcycle AT savvasstafilidis effectofstretchshorteningmagnitudeandmuscletendonunitlengthonperformanceenhancementinastretchshorteningcycle AT arnoldbaca effectofstretchshorteningmagnitudeandmuscletendonunitlengthonperformanceenhancementinastretchshorteningcycle
_version_	1718377980262088704

The effect of stretch–shortening magnitude and muscle–tendon unit length on performance enhancement in a stretch–shortening cycle

Ejemplares similares