Dataset Information

Test Re-test Reliability of Single and Multijoint Strength Properties in Female Australian Footballers.

ABSTRACT:

Purpose

To examine the test re-test reliability of isometric maximal voluntary contractions (MVC) of hip adduction (ADD_ISO), hip abduction (ABD_ISO), and multijoint leg extension (SQUAT_ISO) in sub-elite female Australian footballers.

Methods

Data were collected from 24 sub-elite female Australian footballers (age 22.6 ± 4.5 years; height 169.4 ± 5.5 cm; body mass 66.6 ± 8.0 kg; 4.5 ± 4.4 years sport-specific training; 2.5 ± 2.0 years unstructured resistance training) from the same club on two non-consecutive days. Participants performed three isometric MVCs of ADD_ISO, ABD_ISO, and SQUAT_ISO. The SQUAT_ISO was performed at 140° knee flexion with a vertical trunk position and ADD_ISO and ABD_ISO measures were performed in a supine position at 60° of knee flexion and 60° hip flexion. Reliability was assessed using paired t tests and the intraclass correlation coefficient (ICC) with 95% confidence intervals (CI), typical error (TE), and coefficient of variation (CV%) with 95% CI.

Results

SQUAT_ISO peak force (ICC .95; CV% 4.1), ABD_ISO for left, right, and sum (ICC .90-.92; CV% 5.0-5.7), and ADD_ISO for left, right, and sum (ICC .86-.91; CV% 6.2-6.9) were deemed acceptably reliable based on predetermined criteria (ICC ? .8 and CV% ? 10).

Conclusion

SQUAT_ISO, ABD_ISO, and ADD_ISO tests demonstrated acceptable reliability for the assessment of peak force in sub-elite female Australian footballers, suggesting these assessments are suitable for muscle strength testing and monitoring adaptations to training.

SUBMITTER: Kadlec D

PROVIDER: S-EPMC7797013 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

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Publications

Test Re-test Reliability of Single and Multijoint Strength Properties in Female Australian Footballers.

Kadlec Daniel D Jordan Matthew J MJ Snyder Leanne L Alderson Jacqueline J Nimphius Sophia S

Sports medicine - open 20210109 1

<h4>Purpose</h4>To examine the test re-test reliability of isometric maximal voluntary contractions (MVC) of hip adduction (ADD<sub>ISO</sub>), hip abduction (ABD<sub>ISO</sub>), and multijoint leg extension (SQUAT<sub>ISO</sub>) in sub-elite female Australian footballers.<h4>Methods</h4>Data were collected from 24 sub-elite female Australian footballers (age 22.6 ± 4.5 years; height 169.4 ± 5.5 cm; body mass 66.6 ± 8.0 kg; 4.5 ± 4.4 years sport-specific training; 2.5 ± 2.0 years unstructured re ...[more]

PMID: 33420849

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Project description:BackgroundThe Fukuda-stepping-test (FST), i.e., repetitive walking on the spot while blindfolded, has been proposed as a means to assess the integrity of the vestibular pathways. While its sensitivity to detect abnormalities in patients is limited, it may be useful in studying the physiology of the subjective-straight-ahead (SSA). Considering reported systematic shifts in SSA in humans, we hypothesize that such asymmetries arise from individual differences in the orientation/configuration of the macular organs and in central processing of vestibular input. We hypothesize that such asymmetries are stable over time in individual subjects. Alternatively, such asymmetries may arise from random noise in the sensory/motor systems involved, demonstrating low reproducibility over time.Materials and methodsTwenty-four subjects walked on the spot over 60 s while blindfolded (n = 6 trials per subject). Using an inertial measurement unit (IMU) placed at the chest, angular deviations were recorded and compared to manually-measured final positions. Both static (direction, magnitude) and dynamic (time-to-onset of deviation, pattern of deviations) parameters were retrieved from the yaw slopes.ResultsSignificant deviations were found in 15/24 participants for the manual measurements (leftwards = 8; rightwards = 7), whereas when using the IMU-sensor 13/24 participants showed significant shifts (leftwards = 9; rightwards = 4). There was a high correlation (0.98) between manually measured rotation angles (average absolute deviations = 58.0 deg ± 48.6 deg; intra-individual variability = 39 deg ± 24 deg) and sensor-based yaw slopes (1.00 deg/s ± 0.88 deg/s; 0.67 deg/s ± 0.41 deg/s). Relevant yaw deviation was detected 22.1 s ± 12.3 s (range = 5.6 s-59.2 s) after the onset of marching (no relevant yaw-deviation in 15/139 measurements), showing a mostly linear behavior over time.ConclusionWe observed significant inter-individual variability in task performance in the FST, reproducing findings from previous studies. With test-re-test reliability being moderate only, but at the same time observing a preference in the side of shifts in most trials and subjects, we conclude that likely both individually varying estimates of straight-ahead and random noise contribute to the pattern of angular deviations observed. Using an IMU-sensory based approach, additional dynamic parameters could be retrieved, emphasizing the value of such a quantitative approach over manual measurements. Such an approach may provide useful additional information to distinguish patients from healthy controls.

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Dataset Information

Test Re-test Reliability of Single and Multijoint Strength Properties in Female Australian Footballers.

Purpose

Methods

Results

Conclusion

Publications

Test Re-test Reliability of Single and Multijoint Strength Properties in Female Australian Footballers.

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