Altered countermovement jump force profile and muscle-tendon unit kinematics following combined ballistic training

Article


Hoffman, Ben W., Raiteri, Brent J., Connick, Mark J., Beckman, Emma M., Macaro, Angelo, Kelly, Vincent G. and James, Lachlan P.. 2022. "Altered countermovement jump force profile and muscle-tendon unit kinematics following combined ballistic training ." Scandinavian Journal of Medicine and Science in Sports. 32 (10), pp. 1464-1476. https://doi.org/10.1111/sms.14211
Article Title

Altered countermovement jump force profile and muscle-tendon unit kinematics following combined ballistic training

ERA Journal ID9803
Article CategoryArticle
AuthorsHoffman, Ben W. (Author), Raiteri, Brent J. (Author), Connick, Mark J. (Author), Beckman, Emma M. (Author), Macaro, Angelo (Author), Kelly, Vincent G. (Author) and James, Lachlan P. (Author)
Journal TitleScandinavian Journal of Medicine and Science in Sports
Journal Citation32 (10), pp. 1464-1476
Number of Pages13
Year2022
PublisherJohn Wiley & Sons
Place of PublicationUnited Kingdom
ISSN0905-7188
1600-0838
Digital Object Identifier (DOI)https://doi.org/10.1111/sms.14211
Web Address (URL)https://onlinelibrary.wiley.com/doi/full/10.1111/sms.14211
Abstract

Combined heavy- and light-load ballistic training is often employed in high-performance sport to improve athletic performance and is accompanied by adaptations in muscle architecture. However, little is known about how training affects muscle-tendon unit (MTU) kinematics during the execution of a sport-specific skill (e.g., jumping), which could improve our understanding of how training improves athletic performance. The aim of this study was to investigate vastus lateralis (VL) MTU kinematics during a countermovement jump (CMJ) following combined ballistic training. Eighteen young, healthy males completed a 10-week program consisting of weightlifting derivatives, plyometrics, and ballistic tasks under a range of loads. Ultrasonography of VL and force plate measurements during a CMJ were taken at baseline, mid-test, and post-test. The training program improved CMJ height by 11 ± 13%. During the CMJ, VL's MTU and series elastic element (SEE) length changes and velocities increased from baseline to post-test, but VL's fascicle length change and velocity did not significantly change. It is speculated that altered lower limb coordination and increased force output of the lower limb muscles during the CMJ allowed more energy to be stored within VL's SEE. This may have contributed to enhanced VL MTU work during the propulsion phase and an improved CMJ performance following combined ballistic training.

Keywordsmuscle mechanics, performance, resistance exercise, Ultrasonography, weightlifting
ANZSRC Field of Research 2020420701. Biomechanics
420799. Sports science and exercise not elsewhere classified
420702. Exercise physiology
Byline AffiliationsSchool of Health and Medical Sciences
Ruhr University Bochum, Germany
University of Queensland
La Trobe University
Institution of OriginUniversity of Southern Queensland
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