Kinematic and Neuromuscular Measures of Intensity During Drop Jumps in Female Volleyball Players
The aim of this study was to assess drop jump (DJ) performance variables (jump height, contact time, and reactive strength index) concomitant to surface electromyography (sEMG) of lower limb muscles during DJs from different drop heights (intensities). The eccentric and concentric phase sEMG from th...
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doaj-4dee56ad42504b61952f7254380bb49e2021-09-20T05:26:28ZengFrontiers Media S.A.Frontiers in Psychology1664-10782021-09-011210.3389/fpsyg.2021.724070724070Kinematic and Neuromuscular Measures of Intensity During Drop Jumps in Female Volleyball PlayersMaximiliano Torres-Banduc0Maximiliano Torres-Banduc1Rodrigo Ramirez-Campillo2David Cristobal Andrade3Julio Calleja-González4Pantelis Theo Nikolaidis5John J. McMahon6Paul Comfort7Paul Comfort8Paul Comfort9Escuela de Kinesiología, Facultad de Ciencias de la Salud, Universidad de Las Américas, Viña del Mar, ChileEscuela de Ciencias de la Salud, Universidad de Viña del Mar, Viña del Mar, ChileDepartment of Physical Activity Sciences, Universidad de Los Lagos, Osorno, ChileCentro de Investigación en Fisiología y Medicina de Altura, Faculty of Health Science, Universidad de Antofagasta, Antofagasta, ChileDepartment of Physical Education and Sport, Faculty of Education and Sport, University of the Basque Country, Vitoria-Gasteiz, SpainExercise Physiology Laboratory, Nikaia, GreeceDirectorate of Psychology and Sport, School of Health and Society, University of Salford, Salford, United KingdomDirectorate of Psychology and Sport, School of Health and Society, University of Salford, Salford, United KingdomInstitute for Sport, Physical Activity and Leisure, Carnegie School of Sport, Leeds Beckett University, Leeds, United KingdomCentre for Exercise and Sports Science Research, Edith Cowan University, Joondalup, WA, AustraliaThe aim of this study was to assess drop jump (DJ) performance variables (jump height, contact time, and reactive strength index) concomitant to surface electromyography (sEMG) of lower limb muscles during DJs from different drop heights (intensities). The eccentric and concentric phase sEMG from the gastrocnemius medialis, biceps femoris, and vastus medialis muscles were assessed during all tests, with sEMG activity normalized to maximal voluntary isometric contraction (MVIC). In a cross-sectional, study, 10 amateur female volleyball players (age 22.1 ± 1.8 years; body mass 72.9 ± 15.2 kg; height 1.70 ± 0.08 m) completed DJs from six heights [15–90 cm (DJ15 to DJ90)]. During DJs there was no jump-target box to rebound on to. Results of one-way analysis of variance (ANOVA) showed that the jump height, contact time, and reactive strength index were not significantly (p > 0.05) different between drop heights. Mean biceps femoris eccentric and concentric sEMG ranged from 27 to 50%, although without significant differences between drop heights. Mean gastrocnemius medialis eccentric and concentric sEMG remained relatively constant (∼60–80% MVIC) across DJs heights, although eccentric values reached 90–120% MVIC from DJ75 to DJ90. Mean variations of ∼50–100% MVIC for eccentric and ∼50–70% MVIC for concentric sEMG activations were observed in the vastus medialis across DJs heights. The biceps femoris eccentric/concentric sEMG ratio during DJ45 (i.e., 1.0) was lower (p = 0.03) compared to the ratio observed after DJ90 (i.e., 3.2). The gastrocnemius medialis and vastus medialis eccentric/concentric sEMG ratio were not significantly different between drop heights. In conclusion, jumping performance and most neuromuscular markers were not sensitive to DJ height (intensity) in amateur female volleyball athletes.https://www.frontiersin.org/articles/10.3389/fpsyg.2021.724070/fullvolleyballteam sportsportshuman physical conditioningresistance trainingplyometric exercise |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Maximiliano Torres-Banduc Maximiliano Torres-Banduc Rodrigo Ramirez-Campillo David Cristobal Andrade Julio Calleja-González Pantelis Theo Nikolaidis John J. McMahon Paul Comfort Paul Comfort Paul Comfort |
spellingShingle |
Maximiliano Torres-Banduc Maximiliano Torres-Banduc Rodrigo Ramirez-Campillo David Cristobal Andrade Julio Calleja-González Pantelis Theo Nikolaidis John J. McMahon Paul Comfort Paul Comfort Paul Comfort Kinematic and Neuromuscular Measures of Intensity During Drop Jumps in Female Volleyball Players Frontiers in Psychology volleyball team sport sports human physical conditioning resistance training plyometric exercise |
author_facet |
Maximiliano Torres-Banduc Maximiliano Torres-Banduc Rodrigo Ramirez-Campillo David Cristobal Andrade Julio Calleja-González Pantelis Theo Nikolaidis John J. McMahon Paul Comfort Paul Comfort Paul Comfort |
author_sort |
Maximiliano Torres-Banduc |
title |
Kinematic and Neuromuscular Measures of Intensity During Drop Jumps in Female Volleyball Players |
title_short |
Kinematic and Neuromuscular Measures of Intensity During Drop Jumps in Female Volleyball Players |
title_full |
Kinematic and Neuromuscular Measures of Intensity During Drop Jumps in Female Volleyball Players |
title_fullStr |
Kinematic and Neuromuscular Measures of Intensity During Drop Jumps in Female Volleyball Players |
title_full_unstemmed |
Kinematic and Neuromuscular Measures of Intensity During Drop Jumps in Female Volleyball Players |
title_sort |
kinematic and neuromuscular measures of intensity during drop jumps in female volleyball players |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Psychology |
issn |
1664-1078 |
publishDate |
2021-09-01 |
description |
The aim of this study was to assess drop jump (DJ) performance variables (jump height, contact time, and reactive strength index) concomitant to surface electromyography (sEMG) of lower limb muscles during DJs from different drop heights (intensities). The eccentric and concentric phase sEMG from the gastrocnemius medialis, biceps femoris, and vastus medialis muscles were assessed during all tests, with sEMG activity normalized to maximal voluntary isometric contraction (MVIC). In a cross-sectional, study, 10 amateur female volleyball players (age 22.1 ± 1.8 years; body mass 72.9 ± 15.2 kg; height 1.70 ± 0.08 m) completed DJs from six heights [15–90 cm (DJ15 to DJ90)]. During DJs there was no jump-target box to rebound on to. Results of one-way analysis of variance (ANOVA) showed that the jump height, contact time, and reactive strength index were not significantly (p > 0.05) different between drop heights. Mean biceps femoris eccentric and concentric sEMG ranged from 27 to 50%, although without significant differences between drop heights. Mean gastrocnemius medialis eccentric and concentric sEMG remained relatively constant (∼60–80% MVIC) across DJs heights, although eccentric values reached 90–120% MVIC from DJ75 to DJ90. Mean variations of ∼50–100% MVIC for eccentric and ∼50–70% MVIC for concentric sEMG activations were observed in the vastus medialis across DJs heights. The biceps femoris eccentric/concentric sEMG ratio during DJ45 (i.e., 1.0) was lower (p = 0.03) compared to the ratio observed after DJ90 (i.e., 3.2). The gastrocnemius medialis and vastus medialis eccentric/concentric sEMG ratio were not significantly different between drop heights. In conclusion, jumping performance and most neuromuscular markers were not sensitive to DJ height (intensity) in amateur female volleyball athletes. |
topic |
volleyball team sport sports human physical conditioning resistance training plyometric exercise |
url |
https://www.frontiersin.org/articles/10.3389/fpsyg.2021.724070/full |
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