Differences in leg muscle activity and body sway between elderly adults able and unable to maintain one-leg stance for 1 min: the effect of hand support

Uchida, Yu; Demura, Shinichi

doi:10.1007/s40520-015-0461-x

Cited by 7 publications

(2 citation statements)

References 25 publications

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“…Moreover, while it seems that reliability is moderate to good for timing OLS studies,46 it is possible that in a clinical setting with older participants timing measurements tend to be less reproducible due to high intraparticipant and interobserver variation, potentially limiting the validity of the OLS results. Additionally, there are distinct ways in which OLS has been assessed, with variations in arm/hand positions, whether arm movements for stabilisation are allowed and position of the opposite leg and foot, with some of the studies allowing a swing leg that incorporates a muscle strength component 18 38 47–49…”

Section: Discussionmentioning

confidence: 99%

Successful 10-second one-legged stance performance predicts survival in middle-aged and older individuals

Araújo¹,

Silva²,

Laukkanen

et al. 2022

Br J Sports Med

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ObjectivesBalance quickly diminishes after the mid-50s increasing the risk for falls and other adverse health outcomes. Our aim was to assess whether the ability to complete a 10- s one-legged stance (10-second OLS) is associated with all-cause mortality and whether it adds relevant prognostic information beyond ordinary demographic, anthropometric and clinical data.MethodsAnthropometric, clinical and vital status and 10-s OLS data were assessed in 1702 individuals (68% men) aged 51–75 years between 2008 and 2020. Log-rank and Cox modelling were used to compare survival curves and risk of death according to ability (YES) or inability (NO) to complete the 10-s OLS test.ResultsOverall, 20.4% of the individuals were classified as NO. During a median follow-up of 7 years, 7.2% died, with 4.6% (YES) and 17.5% (NO) on the 10-s OLS. Survival curves were worse for NO 10-s OLS (log-rank test=85.6; p<0.001). In an adjusted model incorporating age, sex, body mass index and comorbidities, the HR of all-cause mortality was higher (1.84 (95% CI: 1.23 to 2.78) (p<0.001)) for NO individuals. Adding 10-s OLS to a model containing established risk factors was associated with significantly improved mortality risk prediction as measured by differences in −2 log likelihood and integrated discrimination improvement.ConclusionsWithin the limitations of uncontrolled variables such as recent history of falls and physical activity, the ability to successfully complete the 10-s OLS is independently associated with all-cause mortality and adds relevant prognostic information beyond age, sex and several other anthropometric and clinical variables. There is potential benefit to including the 10-s OLS as part of routine physical examination in middle-aged and older adults.

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Section: Discussionmentioning

confidence: 99%

Successful 10-second one-legged stance performance predicts survival in middle-aged and older individuals

Araújo¹,

Silva²,

Laukkanen

et al. 2022

Br J Sports Med

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“…Previous studies showed that sEMG was able to accurately measure muscle activity through bioelectrical changes [50, 51, 52]. TA played an important role in the stabilization of OLS [53], and the stability of the sEMG signal amplitude during the process of maintaining balance meant the improvement of balance efficiency. So, the mechanism was using less muscle activation to accomplish the same task [54].…”

Section: Discussionmentioning

confidence: 99%

Combined effects of 12-week yoga warm-up on athletic performance in male high school track and field athletes

Wei

2022

Preprint

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Background: Practicing yoga could improve balance and flexibility, but its positive significance as a long-term warm-up for formal training was uncertain. We hypothesized that practicing yoga during warm-up might positively affect balance, flexibility, and speed performance in male high school track and field athletes. Methods: Over a 12-week period, athletes in a yoga group (YG) (n=10) practiced yoga for 15 min 4 times a week during warm-up, while athletes in a dynamic stretching group (DSG) (n=10) practiced 15 min of dynamic stretching. Except for the warm-up activities, the training content of the two groups of students was the same. we tested performance indicators immediately before and after the intervention, including lower extremity flexibility test (right hip active flexion range), lower extremity balance test [using surface electromyography (sEMG) to measure right leg tibialis anterior (TA) activation during one-leg stance (OLS) with eyes closed], and speed performance test (100-meter and 800-meter tests). Results: We performed between-group and within-group comparisons for indicators of two groups by using SPSS (version 26.0). Within-group comparisons showed a significant improvement in flexibility (P=0.002) and balance (P=0.003) in YG, but no significant change in DSG, after the 12-week intervention. In addition, speed performance of both YG (100m, P=0.026; 800m, P=0.045) and DSG (100m, P=0.029; 800m, P=0.006) was significantly improved. Between-group comparison showed that YG had a significant advantage in 800m (P=0.045) and flexibility (P=0.031). Conclusions: These data suggested that practicing yoga as a long-term warm-up could help male high school track and field athletes improve lower body flexibility and 800m speed. In addition, yoga had a certain positive effect on balance, but it was not significant overall.

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Visually-guided saccades attenuate postural sway under non-fatigued, fatigued, and stretched states

et al. 2018

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Differences in leg muscle activity and body sway between elderly adults able and unable to maintain one-leg stance for 1 min: the effect of hand support

Abstract: These results highlight the need to differentiate between patients able and unable to perform OLS unaided for training because of differences in leg muscle activity.

Cited by 7 publications

References 25 publications

Successful 10-second one-legged stance performance predicts survival in middle-aged and older individuals

Successful 10-second one-legged stance performance predicts survival in middle-aged and older individuals

Combined effects of 12-week yoga warm-up on athletic performance in male high school track and field athletes

Visually-guided saccades attenuate postural sway under non-fatigued, fatigued, and stretched states

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