Can stabilization analysis following a single leg drop jump be compared between young and middle-aged adults

Roee Hayek; Uri Gottlieb; Itai Gutman; Idsart Kingma; Shmuel Springer

doi:10.1016/j.jbiomech.2022.111269

Can stabilization analysis following a single leg drop jump be compared between young and middle-aged adults

Roee Hayek, Uri Gottlieb, Itai Gutman, Idsart Kingma, Shmuel Springer^*

^*Corresponding author for this work

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Abstract

We aimed to verify whether the computational approaches previously proposed to analyze stability after a single-leg drop-jump (SLDJ) could be applied to a population of middle-aged adults. Fifteen middle-aged (56.4 ± 4.6 years) and 15 young adults (26.7 ± 3.9 years) performed five SLDJs. Stabilization measurements included (1) time to stabilization (TTS) based on vertical ground reaction force (GRF) (TTSv) and a fixed stabilization threshold; (2) TTS based on medio-lateral GRF (TTSml) using five different methods to preprocess the signal and stabilization threshold; (3) early medio-lateral stabilization- the averaged absolute values of the GRF in 0.2–1.4 s post-landing; (4) late medio-lateral stabilization - the averaged absolute values of the GRF at 1 s–5 s after landing. TTSv showed longer TTS values in middle-aged participants. In addition, middle-aged adults showed greater sway in late stabilization. However, TTSml values varied considerably between calculation methods, and early stabilization showed no significant differences between groups except in the first 0.2 s after landing. The results of the current study suggest that TTS calculations are sensitive to signal and threshold selection, and to the processing method. Calculations based on a fixed threshold are more appropriate for studying dynamic postural stability in middle age. With appropriate method selection, a decreased stabilizing performance can be demonstrated in middle-aged adults compared to young adults.

Original language	English
Article number	111269
Pages (from-to)	1-8
Number of pages	8
Journal	Journal of Biomechanics
Volume	143
Early online date	25 Aug 2022
DOIs	https://doi.org/10.1016/j.jbiomech.2022.111269
Publication status	Published - Oct 2022

Bibliographical note

Funding Information:
The authors would like to thank all individuals who volunteered to participate in this study. The authors received no financial support for the research or authorship. Internal university publication support was provided.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

Dynamic
Ground reaction force
Middle-age
Outcome measures
Postural control

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10.1016/j.jbiomech.2022.111269

Can stabilization analysis following a single leg drop jump be compared between young and middle-aged adultsFinal published version, 5.06 MBLicence: Article 25fa Dutch Copyright Act

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abstract = "We aimed to verify whether the computational approaches previously proposed to analyze stability after a single-leg drop-jump (SLDJ) could be applied to a population of middle-aged adults. Fifteen middle-aged (56.4 ± 4.6 years) and 15 young adults (26.7 ± 3.9 years) performed five SLDJs. Stabilization measurements included (1) time to stabilization (TTS) based on vertical ground reaction force (GRF) (TTSv) and a fixed stabilization threshold; (2) TTS based on medio-lateral GRF (TTSml) using five different methods to preprocess the signal and stabilization threshold; (3) early medio-lateral stabilization- the averaged absolute values of the GRF in 0.2–1.4 s post-landing; (4) late medio-lateral stabilization - the averaged absolute values of the GRF at 1 s–5 s after landing. TTSv showed longer TTS values in middle-aged participants. In addition, middle-aged adults showed greater sway in late stabilization. However, TTSml values varied considerably between calculation methods, and early stabilization showed no significant differences between groups except in the first 0.2 s after landing. The results of the current study suggest that TTS calculations are sensitive to signal and threshold selection, and to the processing method. Calculations based on a fixed threshold are more appropriate for studying dynamic postural stability in middle age. With appropriate method selection, a decreased stabilizing performance can be demonstrated in middle-aged adults compared to young adults.",

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author = "Roee Hayek and Uri Gottlieb and Itai Gutman and Idsart Kingma and Shmuel Springer",

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AU - Kingma, Idsart

AU - Springer, Shmuel

N1 - Funding Information: The authors would like to thank all individuals who volunteered to participate in this study. The authors received no financial support for the research or authorship. Internal university publication support was provided. Publisher Copyright: © 2022 Elsevier Ltd

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N2 - We aimed to verify whether the computational approaches previously proposed to analyze stability after a single-leg drop-jump (SLDJ) could be applied to a population of middle-aged adults. Fifteen middle-aged (56.4 ± 4.6 years) and 15 young adults (26.7 ± 3.9 years) performed five SLDJs. Stabilization measurements included (1) time to stabilization (TTS) based on vertical ground reaction force (GRF) (TTSv) and a fixed stabilization threshold; (2) TTS based on medio-lateral GRF (TTSml) using five different methods to preprocess the signal and stabilization threshold; (3) early medio-lateral stabilization- the averaged absolute values of the GRF in 0.2–1.4 s post-landing; (4) late medio-lateral stabilization - the averaged absolute values of the GRF at 1 s–5 s after landing. TTSv showed longer TTS values in middle-aged participants. In addition, middle-aged adults showed greater sway in late stabilization. However, TTSml values varied considerably between calculation methods, and early stabilization showed no significant differences between groups except in the first 0.2 s after landing. The results of the current study suggest that TTS calculations are sensitive to signal and threshold selection, and to the processing method. Calculations based on a fixed threshold are more appropriate for studying dynamic postural stability in middle age. With appropriate method selection, a decreased stabilizing performance can be demonstrated in middle-aged adults compared to young adults.

AB - We aimed to verify whether the computational approaches previously proposed to analyze stability after a single-leg drop-jump (SLDJ) could be applied to a population of middle-aged adults. Fifteen middle-aged (56.4 ± 4.6 years) and 15 young adults (26.7 ± 3.9 years) performed five SLDJs. Stabilization measurements included (1) time to stabilization (TTS) based on vertical ground reaction force (GRF) (TTSv) and a fixed stabilization threshold; (2) TTS based on medio-lateral GRF (TTSml) using five different methods to preprocess the signal and stabilization threshold; (3) early medio-lateral stabilization- the averaged absolute values of the GRF in 0.2–1.4 s post-landing; (4) late medio-lateral stabilization - the averaged absolute values of the GRF at 1 s–5 s after landing. TTSv showed longer TTS values in middle-aged participants. In addition, middle-aged adults showed greater sway in late stabilization. However, TTSml values varied considerably between calculation methods, and early stabilization showed no significant differences between groups except in the first 0.2 s after landing. The results of the current study suggest that TTS calculations are sensitive to signal and threshold selection, and to the processing method. Calculations based on a fixed threshold are more appropriate for studying dynamic postural stability in middle age. With appropriate method selection, a decreased stabilizing performance can be demonstrated in middle-aged adults compared to young adults.

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Can stabilization analysis following a single leg drop jump be compared between young and middle-aged adults

Abstract

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