Velocity loss is a flawed method for monitoring and prescribing resistance training volume with a free-weight back squat exercise.

Jukic, I; Prnjak, K; King, A; McGuigan, MR; Helms, ER

Velocity loss is a flawed method for monitoring and prescribing resistance training volume with a free-weight back squat exercise.

Jukic, I Prnjak, K

King, A McGuigan, MR Helms, ER

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Publisher:: SPRINGER
Publication Type:: Journal Article
Citation:: Eur J Appl Physiol, 2023, 123, (6), pp. 1343-1357
Issue Date:: 2023-06

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Field	Value	Language
dc.contributor.author	Jukic, I
dc.contributor.author	Prnjak, K https://orcid.org/0000-0002-6152-5025
dc.contributor.author	King, A
dc.contributor.author	McGuigan, MR
dc.contributor.author	Helms, ER
dc.date.accessioned	2024-01-30T00:44:54Z
dc.date.available	2023-02-07
dc.date.available	2024-01-30T00:44:54Z
dc.date.issued	2023-06
dc.identifier.citation	Eur J Appl Physiol, 2023, 123, (6), pp. 1343-1357
dc.identifier.issn	1439-6319
dc.identifier.issn	1439-6327
dc.identifier.uri	http://hdl.handle.net/10453/175045
dc.description.abstract	PURPOSE: The aim of this study was to examine the goodness of fit, prediction accuracy, and stability of general and individual relationships between velocity loss and the percentage of completed repetitions out of maximum possible (VL-%repetitions) in the free-weight back squat exercise. The effects of sex, training status and history, as well as personality traits, on the goodness of fit and the accuracy of these relationships were also investigated. METHODS: Forty-six resistance-trained people (15 females and 31 males) performed a one-repetition maximum (1RM) test, and two repetitions to failure (RTF) tests, 72 h apart. RTF tests were performed with 70, 80, and 90% of 1RM with 10 min inter-set rest. RESULTS: The findings question the utility of using general and individual VL-%repetitions relationships to prescribe training volume with free-weight back squats as (1) the agreement in the %repetitions completed until reaching a given velocity loss threshold across two consecutive testing sessions was unacceptable, regardless of the load used; and (2) the ability of general and individual VL-%repetitions relationships to predict %repetitions in a subsequent testing session were poor (absolute errors > 10%). Sex, training status and history, and personality traits did not affect the goodness of fit of general and individual VL-%repetitions relationships or their prediction accuracy, suggesting potential generalisability of those findings among resistance-trained populations. CONCLUSIONS: VL-%repetitions relationships do not seem to provide any additional benefits compared to costless, traditional methods and hence should not be used for monitoring and prescribing resistance training with a free-weight back squat exercise.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	SPRINGER
dc.relation.ispartof	Eur J Appl Physiol
dc.relation.isbasedon	10.1007/s00421-023-05155-x
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	1106 Human Movement and Sports Sciences
dc.subject.classification	Sport Sciences
dc.subject.classification	3202 Clinical sciences
dc.subject.classification	3208 Medical physiology
dc.subject.classification	4207 Sports science and exercise
dc.subject.mesh	Male
dc.subject.mesh	Female
dc.subject.mesh	Humans
dc.subject.mesh	Resistance Training
dc.subject.mesh	Muscle, Skeletal
dc.subject.mesh	Muscle Strength
dc.subject.mesh	Weight Lifting
dc.subject.mesh	Muscle, Skeletal
dc.subject.mesh	Humans
dc.subject.mesh	Weight Lifting
dc.subject.mesh	Female
dc.subject.mesh	Male
dc.subject.mesh	Muscle Strength
dc.subject.mesh	Resistance Training
dc.subject.mesh	Male
dc.subject.mesh	Female
dc.subject.mesh	Humans
dc.subject.mesh	Resistance Training
dc.subject.mesh	Muscle, Skeletal
dc.subject.mesh	Muscle Strength
dc.subject.mesh	Weight Lifting
dc.title	Velocity loss is a flawed method for monitoring and prescribing resistance training volume with a free-weight back squat exercise.
dc.type	Journal Article
utslib.citation.volume	123
utslib.location.activity	Germany
utslib.for	1106 Human Movement and Sports Sciences
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Health
pubs.organisational-group	University of Technology Sydney/Faculty of Health/Graduate School of Health
pubs.organisational-group	University of Technology Sydney/Faculty of Health/Graduate School of Health/GSH.Clinical Psychology
utslib.copyright.status	open_access	*
dc.date.updated	2024-01-30T00:44:53Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	123
utslib.citation.issue	6

Abstract:

PURPOSE: The aim of this study was to examine the goodness of fit, prediction accuracy, and stability of general and individual relationships between velocity loss and the percentage of completed repetitions out of maximum possible (VL-%repetitions) in the free-weight back squat exercise. The effects of sex, training status and history, as well as personality traits, on the goodness of fit and the accuracy of these relationships were also investigated. METHODS: Forty-six resistance-trained people (15 females and 31 males) performed a one-repetition maximum (1RM) test, and two repetitions to failure (RTF) tests, 72 h apart. RTF tests were performed with 70, 80, and 90% of 1RM with 10 min inter-set rest. RESULTS: The findings question the utility of using general and individual VL-%repetitions relationships to prescribe training volume with free-weight back squats as (1) the agreement in the %repetitions completed until reaching a given velocity loss threshold across two consecutive testing sessions was unacceptable, regardless of the load used; and (2) the ability of general and individual VL-%repetitions relationships to predict %repetitions in a subsequent testing session were poor (absolute errors > 10%). Sex, training status and history, and personality traits did not affect the goodness of fit of general and individual VL-%repetitions relationships or their prediction accuracy, suggesting potential generalisability of those findings among resistance-trained populations. CONCLUSIONS: VL-%repetitions relationships do not seem to provide any additional benefits compared to costless, traditional methods and hence should not be used for monitoring and prescribing resistance training with a free-weight back squat exercise.

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http://hdl.handle.net/10453/175045