Time-of-Day Effects on Dynamic Postural Control

Matsuura, Akihiro; Tomimura, Kota; Karita, Tetsuya; Kondo, Yoshihiro; Yoshino, Kai; Ishikawa, Mamoru; Mori, Futoshi

doi:10.1589/rika.34.79

Cited by 2 publications

(1 citation statement)

References 10 publications

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“…Several studies have reported that high CV during gait is associated with poor postural con-trol 18,19 ) . Moreover, many studies of diurnal patterns have shown that postural control ability fluctuates with time and declines in the morning [20][21][22] . However, another study evaluated postural control and reported no difference in the ability in the morning and daytime 23,24) .…”

Section: Discussionmentioning

confidence: 99%

Initiation gait variability is higher in the morning in elderly inpatients

et al. 2020

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Although elderly inpatients are known to experience decreased physical activity in the morning, falls occur frequently during this time. Gait variability is an evaluation of gait instability and a risk factor for falls. Gait initiation requires complex processes, and it is important to evaluate gait variability not only during steady-state gait but also during gait initiation. However, the effect of the diurnal pattern on variability in gait characteristics is still unknown. The aim of this study was to investigate the effect of the diurnal pattern on initiation and steady-state gait variability in elderly inpatients. Method: Thirty-seven elderly inpatients (28 women; mean age, 79.7 ± 9.5 years) who could walk without support were sampled in this study. The quantitative measure of gait variability was evaluated using the coefficient of variation (CV) based on four consecutive stride durations determined using triaxial accelerometers. Gait characteristics were evaluated during initiation and steady-state gait and defined as initiation CV and steady-state CV, respectively. This measurement was performed at two time points, morning and daytime. Results: There was no significant difference between initiation and steady-state gait characteristics in the daytime condition. However, in the morning condition, the initiation CV was higher than the steady-state CV. Furthermore, the initiation CV was higher in the morning than during daytime (p < 0.01). Conclusion: Our study revealed that the variability of initiation gait is higher in the morning. It may be important to assess the risk of falls, including initiation gait, in the morning.

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Section: Discussionmentioning

confidence: 99%

Initiation gait variability is higher in the morning in elderly inpatients

et al. 2020

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Change in balance ability in day time and the factors in healthy young people using a stabilometer

2023

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Maintaining posture and movement stabilities, that is, balance, is particularly important for safety in daily life along with performing exercises. The purpose of this study was to clarify the changes in static and dynamic balance abilities from 8:00 to 18:00 and investigate the factors of change in balance ability among healthy young people. The subjects were nine relatively active healthy university students. The static and dynamic balance abilities were measured by a body sway test while static standing and the Cross Test, in which the center of gravity was voluntarily moved to the maximum in the front, back, left, and right directions, respectively. No change with time was observed in the static balance index. However, the maximum amplitude in the anteroposterior direction, an index of dynamic balance, significantly increased with time (8:00 vs 18:00, p<0.05). Sleepiness score significantly decreased with time (8:00 vs 18:00, p<0.05). As a result of simple correlation analysis, there were significant relationships between static balance indices (environmental area and rectangle area) and autonomic activity index (heart rate variability) at many times (p<0.05). Thus, it was concluded that the static balance ability was not affected by time. Furthermore, the ability to move the center of gravity in the anteroposterior direction of dynamic balance was low during morning and increased with time in relatively active healthy young people. Additionally, it was suggested that autonomic nervous activity was associated with static balance and the sleepiness was associated with dynamic balance.

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Time-of-Day Effects on Dynamic Postural Control

Cited by 2 publications

References 10 publications

Initiation gait variability is higher in the morning in elderly inpatients

Initiation gait variability is higher in the morning in elderly inpatients

Change in balance ability in day time and the factors in healthy young people using a stabilometer

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