A simple method for quantifying jump loads in volleyball athletes

Charlton, Paula C.; Kenneally-Dabrowski, Claire; Sheppard, Jeremy M.; Spratford, Wayne

doi:10.1016/j.jsams.2016.07.007

Cited by 72 publications

(128 citation statements)

References 13 publications

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“…MacDonald et al, placing the device in the lumbar region, found that the device underestimated jump height by 2.5 cm (maximal jumps) to 4.1 cm (submaximal jumps). In contrast, placing the device in front, our study and that by Charlton et al found the device to overestimate jump height across all volleyball jumps, by 5.5 cm and 3.6‐4.3 cm, respectively.…”

Section: Discussioncontrasting

confidence: 99%

“…The Vert device showed excellent interdevice reliability for two devices placed at the waist, consistent with previous research in junior‐level athletes . However, the large MDC during countermovement and volleyball jumps limits the use of the device for jump height testing.…”

Section: Discussionsupporting

confidence: 85%

“…Examiner one, blinded from the Vert results, was the primary reviewer of the video, while examiner two simultaneously coded each jump and consulted the video for clarification on individual jumps. A jump was defined using the same definition as Charlton et al of: “any occasion where both feet of the athlete were visually inspected to leave the ground at approximately the same time.” The Vert device, however, uses a minimum threshold of 15 cm before recording a jump. To account for this, all jumps that were observed on video and not recorded by the device were reassessed by both examiners and jumps estimated to be <15 cm were categorized as “small” and not included for analysis.…”

Section: Methodsmentioning

confidence: 99%

“…With improved technology, we may be able to examine jump load for individual players by monitoring not only jump count, but also jump height through the use of an inertial measurement unit (IMU). Two small studies have reported acceptable validity of a commercially available IMU with adolescent volleyball players . Use of the IMU has grown significantly as university programs, professional clubs, and national teams have started to monitor jump load.…”

Section: Introductionmentioning

confidence: 99%

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A valid and reliable method to measure jump‐specific training and competition load in elite volleyball players

Skazalski

Whiteley

Hansen

et al. 2018

Scandinavian Med Sci Sports

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Use of a commercially available wearable device to monitor jump load with elite volleyball players has become common practice. The purpose of this study was to evaluate the validity and reliability of this device, the Vert, to count jumps and measure jump height with professional volleyball players. Jump count accuracy was determined by comparing jumps recorded by the device to jumps observed through systematic video analysis of three practice sessions and two league matches performed by a men's professional volleyball team. Jumps performed by 14 players were each coded for time and jump type and individually matched to device recorded jumps. Jump height validity of the device was examined against reference standards as participants performed countermovement jumps on a force plate and volleyball-specific jumps with a Vertec. The Vert device accurately counted 99.3% of the 3637 jumps performed during practice and match play. The device showed excellent jump height interdevice reliability for two devices placed in the same pouch during volleyball jumps (r = .99, 95% CI 0.98-0.99). The device had a minimum detectable change (MDC) of 9.7 cm and overestimated jump height by an average of 5.5 cm (95% CI 4.5-6.5) across all volleyball jumps. The Vert device demonstrates excellent accuracy counting volleyball-specific jumps during training and competition. While the device is not recommended to measure maximal jumping ability when precision is needed, it provides an acceptable measure of on-court jump height that can be used to monitor athlete jump load.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionsupporting

confidence: 85%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A valid and reliable method to measure jump‐specific training and competition load in elite volleyball players

Skazalski

Whiteley

Hansen

et al. 2018

Scandinavian Med Sci Sports

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“…Vert device has proven to be valid for measuring vertical displacement and jump count in volleyball players during training and match play, thus improving current practices (Charlton et al, 2017). Through the Vert device, it was possible to directly demonstrate the evolution of vertical jump within the plyometric program for athletes.…”

Section: Resultsmentioning

confidence: 99%

Ways to Improve Vertical Jumps Using Vert Device

Cosma¹

2018

The European Proceedings of Social and Behavioural Sciences

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The volleyball game involves multiple vertical jumps needed for performing technical procedures -the attack, block or serve. All of these require explosive strength in the lower limbs. The aim of the study was to identify the influence of plyometric exercises included in the technical structures specific to the volleyball game. Thus, a group of 12 volleyball players (male, aged 17 ± 1.5 years) participated for 6 months in a training program that included plyometric exercises performed 3 times per week during the precompetitive period. In order to determine the progress of the jump, two specific tests (the attack and block jumps) and the Vert device were used. The Vert device is an accelerometer found at the Human Motricity Research Centre of the Faculty of Physical Education and Sport in Craiova, and designed in the USA. The subjects were tested before and after applying the work program. Following the application of the work program, significant progress has been identified in terms of attack and block jumps, but also in the vertical jump measured by Vert device, the mean difference being statistically significant at a threshold of p <0.05. The Vert instrument has become extremely important in the sports training economy and is also a motivational factor, the individual progress being monitored in real time.

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Assessing acute:chronic workload ratio methodologies for the prediction of knee pain in men's elite volleyball

Damji

MacDonald

Hunt

et al. 2021

Translational Sports Med

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Predicting sports injuries is a complex phenomenon given the multitude of risk factors involved and the need for an inciting event. Recent evidence suggests that the acute:chronic workload ratio (ACWR) is a potentially useful tool for quantifying athlete workloads, with athletes at increased risk of injury when the ACWR is higher relative to a lower ACWR. While several team sports have been studied in the ACWR literature, there is a paucity of studies that focus on volleyball athletes, and no studies that use knee pain as an outcome. Furthermore, controversy exists as inconsistent results among studies may be attributed to differences in calculating the ACWR. Our objective was to assess different definitions of the ACWR for predicting knee pain in elite volleyball athletes. We expected to see agreement with the literature in that ACWR would be positively associated with knee pain. We conducted a retrospective, exploratory analysis on a data set from a University varsity volleyball team. Our mixed effect modeling indicated that the coefficient estimates for the ACWR variants were small and statistically insignificant. The variant used did not have a major influence on the relationship with knee pain score, and the strength of the relationship was weak.

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A simple method for quantifying jump loads in volleyball athletes

Cited by 72 publications

References 13 publications

A valid and reliable method to measure jump‐specific training and competition load in elite volleyball players

A valid and reliable method to measure jump‐specific training and competition load in elite volleyball players

Ways to Improve Vertical Jumps Using Vert Device

Assessing acute:chronic workload ratio methodologies for the prediction of knee pain in men's elite volleyball

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