The validity and reliability of the GymAware linear position transducer for measuring counter-movement jump performance in female athletes

O’Donnell, Shannon; Tavares, Francisco; McMaster, Daniel Travis; Chambers, Samuel A.; Driller, Matthew W.

doi:10.1080/1091367x.2017.1399892

Cited by 34 publications

(32 citation statements)

References 26 publications

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“…The reliability of the CMJ protocol in this same population has been reported previously, with coefficient of variations of 6.2% for jump height, 4.7% for peak velocity and 6.7% for mean velocity. 20 "The Influence of Match-Day Napping in Elite Female Netball Athletes" by O'Donnell S, Beaven CM, Driller M International Journal of Sports Physiology and Performance © 2018 Human Kinetics, Inc.…”

Section: Performance Measuresmentioning

confidence: 99%

The Influence of Match-Day Napping in Elite Female Netball Athletes

O’Donnell¹,

Beaven²,

Driller³

2018

International Journal of Sports Physiology and Performance

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Section: Performance Measuresmentioning

confidence: 99%

The Influence of Match-Day Napping in Elite Female Netball Athletes

O’Donnell¹,

Beaven²,

Driller³

2018

International Journal of Sports Physiology and Performance

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“…The highest recorded value (in cm) was used for analysis. The test-retest reliability of the countermovement jump test has been previously reported [29] with a CV of 6.2% and an ICC of 0.70.…”

Section: Countermovement Jumpmentioning

confidence: 74%

Body Mass Changes and Markers of Fitness, Health, and Well-Being over the First Semester of University in New Zealand Students

Driller

Rogers

Hébert‐Losier

et al. 2020

J. of SCI. IN SPORT AND EXERCISE

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Purpose The current study aimed to assess the changes in physical and perceptual markers of health, fitness, and well-being over the first semester of university study in a New Zealand context. Methods In a pre-post longitudinal design, 90 first-year university students (39 females, 51 males, mean ± SD age: 18 ± 2 years) studying in the field of health, sport and human performance underwent tests of body mass, height, body mass index (BMI), blood pressure, predicted VO 2max , flexibility, countermovement jump height, handgrip strength, isometric mid-thigh pull strength, and well-being pre and post the first semester of university study (12 weeks). Results When evaluating the entire group, there was a significant increase in body mass (0.66 kg, P = 0.004) and BMI (0.2 kg/m 2 , P = 0.005) and decrease in the "engagement" construct of the well-being questionnaire (− 0.2, P = 0.03) over the first semester of university. In total, 73% of students living on-campus reported a decline in sleep and nutrition habits since starting university, in comparison to ~ 35%-40% of students living off-campus (P ≤ 0.03). Conclusion Similar to results seen in other countries, and despite the field of study, the first semester of university in New Zealand is likely to be associated with increases in body mass and BMI; however, changes in physical fitness and overall well-being measures were less obvious in the current study.

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“…Recently, many commercial devices are have been developed to measure jump height from flight time, such as an iPhone app [33] and inertial measurement unit [24]. Other methods have also been in development, such as linear position transducers, but these showed overestimation by 7.0 cm compared to the jump height from flight time [34]. In this study, we confirmed that the flight time method has high intra-participant reliability and no proportional bias, though there is a fixed bias.…”

Section: Discussionmentioning

confidence: 99%

Effect of Landing Posture on Jump Height Calculated from Flight Time

2020

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Flight time is widely used to calculate jump height because of its simple and inexpensive application. However, this method is known to give different results than the calculation from vertical velocity at takeoff. The purpose of this study is to quantify the effect of postural changes between takeoff and landing on the jump height from flight time. Twenty-seven participants performed three vertical jumps with arm swing. Three-dimensional coordinates of anatomical landmarks and the ground reaction force were analyzed. Two methods of calculating jump height were used: (1) the vertical velocity of the whole-body center of mass (COMwb) at takeoff and (2) flight time. The jump height from flight time was overestimated by 0.025 m compared to the jump height from the takeoff velocity (p < 0.05) due to the lower COMwb height at landing by −0.053 m (p < 0.05). The postural changes in foot, shank, and arm segments mainly contributed to decreasing the COMwb height (−0.025, −0.014, and −0.017 m, respectively). The flight time method is reliable and had low intra-participant variability, but it cannot be recommended for a vertical jump when comparing with others (such as at tryouts) because of the potential “cheating” effect of differences in landing posture.

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The validity and reliability of the GymAware linear position transducer for measuring counter-movement jump performance in female athletes

Cited by 34 publications

References 26 publications

The Influence of Match-Day Napping in Elite Female Netball Athletes

The Influence of Match-Day Napping in Elite Female Netball Athletes

Body Mass Changes and Markers of Fitness, Health, and Well-Being over the First Semester of University in New Zealand Students

Effect of Landing Posture on Jump Height Calculated from Flight Time

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