Control strategies used by older adults during multiple obstacle avoidance

Lowrey, Catherine R.; Reed, Rebecca J.; Vallis, Lori Ann

doi:10.1016/j.gaitpost.2006.05.012

Cited by 21 publications

(14 citation statements)

References 16 publications

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“…These results should be viewed with caution because we expected that the older adults would reduce their gait velocity and step length or cadence under the low lighting condition when negotiating the obstacle. Our findings are not consistent with the findings of a previous study 24) in which older adults reduced step velocity and step length while maintaining a similar step width under a low lighting condition (<1 lx). A reduced step velocity may be necessary to adapt gait to an environment with reduced visual input in order to decrease the likelihood of obstacle contact 24) .…”

Section: Discussioncontrasting

confidence: 99%

“…Our findings are not consistent with the findings of a previous study 24) in which older adults reduced step velocity and step length while maintaining a similar step width under a low lighting condition (<1 lx). A reduced step velocity may be necessary to adapt gait to an environment with reduced visual input in order to decrease the likelihood of obstacle contact 24) . Reducing the step length when crossing an obstacle could result in stepping closer to the obstacle which may actually increase the likelihood of obstacle contact 24) .…”

Section: Discussioncontrasting

confidence: 99%

“…A reduced step velocity may be necessary to adapt gait to an environment with reduced visual input in order to decrease the likelihood of obstacle contact 24) . Reducing the step length when crossing an obstacle could result in stepping closer to the obstacle which may actually increase the likelihood of obstacle contact 24) .…”

Section: Discussionmentioning

confidence: 99%

“…Thus, after crossing the obstacle, the subjects performed unobstructed walking on an approximately 4-m pathway (80% of total distance walked). Unobstructed walking may not have been perceived as a challenging environment by the older 24) demonstrated that older adults showed decreased step velocity when crossing an obstacle, as compared to unobstructed walking. In addition, the imposition of a low lighting environment in the presence of an obstacle resulted in a significantly reduced step length in older adults 24) .…”

Section: Discussionmentioning

confidence: 99%

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Effects of Illumination on Toe Clearance and Gait Parameters of Older Adults when Stepping over an Obstacle: a Pilot Study

Cho

Ryu

et al. 2013

J Phys Ther Sci

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Abstract.[Purpose] The purpose of this study was to investigate how older adults adjust gait patterns when stepping over a ground-based obstacle under two different lighting conditions. [Subjects] A total of 10 communitydwelling healthy older adults (mean age, 67.9 ± 2.12 years; age range, 65-72 years) were enrolled in this study.[Methods] All participants stood quietly in a self-selected foot position on the floor. Each participant was then instructed to step over a 10 cm high wooden obstacle under two illumination conditions (1 and 200 lx) at a selfselected pace with the right leg in response to the verbal cue "GO", and continued walking with the left leg on a 5 m pathway. Toe clearances and step parameters were measured using an eight-camera motion analysis system.[Results] Under the low lighting condition, toe clearance of the trailing leg was significantly lower than under the normal lighting condition. However, no significant differences were observed in toe clearance of the lead leg, step velocity, stride length, step length, cadence, or swing/stance duration between the normal and low lighting conditions.[Conclusion] Older adults reduce toe clearance of the trailing leg under low lighting conditions while stepping over an obstacle, which places them at greater risk of falling.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussioncontrasting

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effects of Illumination on Toe Clearance and Gait Parameters of Older Adults when Stepping over an Obstacle: a Pilot Study

Cho

Ryu

et al. 2013

J Phys Ther Sci

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“…There is a necessity for older adults to adapt their movements that would, in turn, facilitate them to accomplish the obstacles and not to reach their limits of stability and balance. Thus, they will have a lower risk of falling when obstacles and changing surfaces occur [18]. The respective authors concluded that the integration of different environmental conditions in tests is essential [20,33] to combat these obstacles.…”

Section: Introductionmentioning

confidence: 99%

The Multisurface Obstacle Test for Older Adults (MSOT): development and reliability of a novel test for older adults

Morat

Kroeger²,

Mechling

2013

Eur Rev Aging Phys Act

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Locomotion is an essential component of independence and well-being at old age. Performance deficits in the gait of older adults most often become evident on multisurface and varying terrains. Research results substantiate that falls occur in everyday movement situations that are characterized by instability. A test track, the Multisurface Obstacle Test for Older Adults (MSOT), was developed to diagnose individual performance. The 10-m track consists of different obstacles and varying surfaces, which represent everyday movement situations in a compact way. Twentynine untrained, healthy older adults (11 men, 18 women) were tested on three different days at 1-week intervals in a test-retest design by the same conductor. Mean age of the participants was 68.8±5.3 years with a mean body mass index of 24.4±2.5 kg/m 2 . The measured outcome variable was the required time (seconds) on the MSOT. The feasibility for the tested sample of untrained older adults was very good. The MSOT was undertaken safely by the participants, and no falls occurred. The range of the mean for time was between 8.12±1.53 s and 9.00±1.62 s. Regarding intertrial reliability, mean differences (MD) of −3.39 to −5.52 % and coefficients of variation (CV) of 2.72 to 4.19 % between the first and second trials and MD of −0.69 to −0.85 % and CV of 2.57 to 4.54 % over the three test sessions were observed. The correlation coefficients between the sessions were .92-.98. There were significant differences (p<.05) between the first and second trials of each session and between the first and second sessions. The smallest detectable differences (SDD) revealed that a small improvement is enough to detect changes in performance in the MSOT. Selecting tasks from real-life situations of older adults contributes to substantiate practical usability of the MSOT. The measured time on the MSOT showed high relative and absolute reliability in the target group of older adults between 60 and 80 years.

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Influence of chromatic and lighting on the visual environment of the elderly: A critical literature review

Guerry

Caumon

Bécheras

et al. 2020

Color Research & Application

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The use of color and lighting as factors for adapting the housing of the elderly is tending to develop, in response to demographic data on the aging of the population and its impact on lifestyles. Adapting the environment for those over 60 years has become a national issue for public policy. So this article takes stock of the studies carried out on this issue. We have to review all the literature devoted to this subject, focusing on research products dealing with the color and light interaction in the indoor environment of seniors.

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Control strategies used by older adults during multiple obstacle avoidance

Cited by 21 publications

References 16 publications

Effects of Illumination on Toe Clearance and Gait Parameters of Older Adults when Stepping over an Obstacle: a Pilot Study

Effects of Illumination on Toe Clearance and Gait Parameters of Older Adults when Stepping over an Obstacle: a Pilot Study

The Multisurface Obstacle Test for Older Adults (MSOT): development and reliability of a novel test for older adults

Influence of chromatic and lighting on the visual environment of the elderly: A critical literature review

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