Model development to study strategies of younger and older adults getting up from the floor

Abstract

Background

Long lies after a fall remain a public health challenge. Many successful fall prevention programmes have been developed but only few of them include recovery strategies after a fall. Once better understood, such movement strategies could be implemented into training interventions.

Aims

A model of motion sequences describing successful movement strategies for rising from the floor in different age groups was developed. Possible risk factors for poor rising performance such as flexibility and muscle power were evaluated.

Methods

Fourteen younger subjects between 20 and 50 years of age and 10 healthy older subjects (60+ years) were included. Movement strategies and key components of different rising sequences were determined from video analyses. The temporal parameters of transfers and number of components within the motion sequences were calculated. Possible explanatory variables for differences in rising performance were assessed (leg extension power, flexibility of the knee- and hip joints).

Results

Seven different components were identified for the lie-to-stand-walk transfer, labelled as lying, initiation, positioning, supporting, elevation, or stabilisation component followed by standing and/or walking. Median time to rise was significantly longer in older subjects (older 5.7s vs. younger 3.7s; p < 0.001), and leg extension power (left p = 0.002, right p = 0.013) and knee flexibility (left p = 0.019, right p = 0.025) were significantly lower. The number of components for rising was correlated with hip flexibility (r = 0.514) and maximal power (r = 0.582). The time to rise was correlated with minimal goniometric knee angle of the less flexible leg (r = 0.527) and maximal leg extension power (r = 0.725).

Conclusions

A motion sequence model containing seven different components identified by individual key-frames could be established. Age-related differences in rising strategies and performance were identified.

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Conflict of interest

The authors certify that there is no actual or potential conflict of interest in relation to this article.

Human and Animal Rights

All procedures were in accordance with the ethical standards of the responsible committee of the University of Tübingen, Germany and with the Helsinki Declaration of 1975, as revised in 2008.

Informed consent

Informed consent was obtained from all individual participants included in the study.

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Correspondence to L. Schwickert.

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Schwickert, L., Oberle, C., Becker, C. et al. Model development to study strategies of younger and older adults getting up from the floor. Aging Clin Exp Res 28, 277–287 (2016). https://doi.org/10.1007/s40520-015-0397-1

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Keywords

  • Recovery strategy
  • Rising
  • Motion sequence
  • Fall detection
  • Prevention