Marker location and knee joint constraint affect the reporting of overhead squat kinematics in elite youth football players

Coyne, Lara M; Newell, Micheál; Hoozemans, M.J.M.; Morrison, Andrew P.; Brown, Susan

doi:10.1080/14763141.2021.1890197

Cited by 3 publications

(1 citation statement)

References 63 publications

(107 reference statements)

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“…All participants were instructed to use the same verbal and visual demonstration of the overhead squat. Participants were asked to stand with feet shoulder-width apart and complete the squat to maximum depth with good trunk control [45]. Participants squatted down as low as they could and return to starting position for five repetitions.…”

Section: Verbal Instructionsmentioning

confidence: 99%

Scapular Kinematics in Overhead Squat with and without Elastic Resistance: Insights from Kinetic Chain Approach and Therapeutic Implications for Shoulder Rehabilitation

Salles,

Pascoal

2023

Preprint

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The overhead squat movement engages various bodily structures, and its interaction with three-dimensional elastic resistance along the kinetic chain approach remains insufficiently comprehended. This study aimed to describe the scapular kinematics during an overhead squat with the forearm in a supination exercise against an ER and clarify the therapeutic potential of this exercise on scapular rehabilitation. Using an electromagnetic tracking system, we recorded the three-dimensional shoulder kinematics of 19 male participants across seven humeral elevation positions. These positions were captured at 15-degree intervals, spanning from 30 to 120 degrees. The results indicated notable distinctions in scapular upward rotation [F(1,17)=6.09, p=0.024] and scapular posterior tilt [F(1,17)=6.04, p=0.025] between the phases. Furthermore, the interactions revealed significant differences in resistance and phases during humeral elevation for scapular upward/downward rotation [F(3.77,62.48)=7.99, p&lt;0.001], scapular internal/external rotation [F(2.98, 50.64, p&lt;0.001)], and scapular tilt [F(2.58, 43.81)=4.76, p=0.008]. The findings demonstrated that increasing resistance through elastic resistance played a pivotal role in enhancing scapular stability throughout the humerus elevation motion. This underscores the potential of the overhead squat movement as a valuable tool for both shoulder assessment and treatment.

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Section: Verbal Instructionsmentioning

confidence: 99%

Scapular Kinematics in Overhead Squat with and without Elastic Resistance: Insights from Kinetic Chain Approach and Therapeutic Implications for Shoulder Rehabilitation

Salles,

Pascoal

2023

Preprint

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Comparison of markerless and marker-based motion capture systems using 95% functional limits of agreement in a linear mixed-effects modelling framework

Das,

de Paula Oliveira,

Newell

2023

Sci Rep

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Biomechanics analysis of human movement has been proven useful for maintenance of health, injury prevention, and rehabilitation in both sports and clinical populations. A marker-based motion capture system is considered the gold standard method of measurement for three dimensional kinematics measurements. However, the application of markers to anatomical bony points is a time consuming process and constrained by inter-, intra-tester and session reliability issues. The emergence of novel markerless motion capture systems without the use of reflective markers is a rapidly growing field in motion analysis. However an assessment of the level of agreement of a markerless system with an established gold standard marker-based system is needed to ensure the applicability of a markerless system. An extra layer of complexity is involved as the kinematics measurements are functional responses. In this paper a new approach is proposed to generate 95% functional limits of agreement (fLoA) using the linear mixed-effects modelling framework for hierarchical study designs. This approach is attractive as it will allow practitioners to extend their use of linear mixed models to assess agreement in method comparison studies in all domains where functional responses are recorded.

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Concurrent validity and test reliability of the deep learning markerless motion capture system during the overhead squat

Bae,

Lee,

Bak

et al. 2024

Sci Rep

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Marker-based optical motion capture systems have been used as a cardinal vehicle to probe and understand the underpinning mechanism of human posture and movement, but it is time-consuming for complex and delicate data acquisition and analysis, labor-intensive with highly trained operators. To mitigate such inherent issues, we developed an accurate and usable (5-min data collection and processing) deep-learning-based 3-Dimensional markerless motion capture system called “Ergo”, designed for use in ecological digital healthcare environments. We investigated the concurrent validity and the test–retest reliability of the Ergo system measurement’s whole body joint kinematics (time series joint angles and peak joint angles) data by comparing it with a standard marker-based motion capture system recorded during an overhead squat movement. The Ergo system demonstrated excellent agreement for time series joint angles ( = 0.88–0.99) and for peak joint angles ( = 0.75–1.0) when compared with the gold standard marker-based motion capture system. Additionally, we observed high test-retest reliability ( = 0.92–0.99). In conclusion, the deep learning-based markerless Ergo motion capture system considerably shows comparable performance with the Gold Standard marker-based motion capture system measurements in the concurrent accuracy, reliability, thereby making it a highly accessible choice for diverse universal users and ecological industries or environments.

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Marker location and knee joint constraint affect the reporting of overhead squat kinematics in elite youth football players

Cited by 3 publications

References 63 publications

Scapular Kinematics in Overhead Squat with and without Elastic Resistance: Insights from Kinetic Chain Approach and Therapeutic Implications for Shoulder Rehabilitation

Scapular Kinematics in Overhead Squat with and without Elastic Resistance: Insights from Kinetic Chain Approach and Therapeutic Implications for Shoulder Rehabilitation

Comparison of markerless and marker-based motion capture systems using 95% functional limits of agreement in a linear mixed-effects modelling framework

Concurrent validity and test reliability of the deep learning markerless motion capture system during the overhead squat

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