NDLI: The MARS for squat, countermovement, and standing long jump performance analyses: are measures reproducible?

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The MARS for squat, countermovement, and standing long jump performance analyses: are measures reproducible?

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The MARS for squat, countermovement, and standing long jump performance analyses: are measures reproducible?

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Hébert-Losier, Kim Beaven, C. Martyn
Description	Country affiliation: Sweden Author Affiliation: Hébert-Losier K ( Swedish Winter Sports Research Centre, Department of Health Sciences, Mid Sweden University, Östersund, Sweden.)
Abstract	Jump tests are often used to assess the effect of interventions because their outcomes are reported valid indicators of functional performance. In this study, we examined the reproducibility of performance parameters from 3 common jump tests obtained using the commercially available Kistler Measurement, Analysis and Reporting Software (MARS). On 2 separate days, 32 men performed 3 squat jumps (SJs), 3 countermovement jumps (CMJs), and 3 standing long jumps (LJs) on a Kistler force-plate. On both days, the performance measures from the best jump of each series were extracted using the MARS. Changes in the mean scores, intraclass correlation coefficients (ICCs), and coefficients of variations (CVs) were computed to quantify the between-day reproducibility of each parameter. Moreover, the reproducibility quantifiers specific to the 3 separate jumps were compared using nonparametric tests. Overall, an acceptable between-day reproducibility (mean ± SD, ICC, and CV) of SJ (0.88 ± 0.06 and 7.1 ± 3.8%), CMJ (0.84 ± 0.17 and 5.9 ± 4.1%), and LJ (0.80 ± 0.13 and 8.1 ± 4.1%) measures was found using the MARS, except for parameters directly relating to the rate of force development (i.e., time to maximal force) and change in momentum during countermovement (i.e., negative force impulse) where reproducibility was lower. A greater proportion of the performance measures from the standing LJs had low ICCs and/or high CVs values most likely owing to the complex nature of the LJ test. Practitioners and researchers can use most of the jump test parameters from the MARS with confidence to quantify changes in the functional ability of individuals over time, except for those relating to the rate of force development or change in momentum during countermovement phases of jumps.
File Format	HTM / HTML
ISSN	10648011
Issue Number	7
Volume Number	28
e-ISSN	15334287
Journal	Journal of Strength and Conditioning Research
Language	English
Publisher	Lippincott Williams & Wilkins
Publisher Date	2014-07-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discipline Sport Sciences Athletic Performance Physiology Exercise Test Movement Software Adult Biomechanical Phenomena Humans Male Middle Aged Muscle Strength Reproducibility Of Results Young Adult Journal Article
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Physical Therapy, Sports Therapy and Rehabilitation Sports Science

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