scholarly journals The effect of support surface and footwear condition on postural sway and lower limb muscle action of the older women

PLoS ONE ◽  
2020 ◽  
Vol 15 (6) ◽  
pp. e0234140
Author(s):  
Meizhen Huang ◽  
Kit-lun Yick ◽  
Sun-pui Ng ◽  
Joanne Yip ◽  
Roy Tsz-hei Cheung
2019 ◽  
Author(s):  
Meizhen Huang ◽  
Kit-lun Yick ◽  
Sun-pui Ng ◽  
Joanne Yip ◽  
Roy Cheung

Abstract Background: Diminished somatosensory function and lower plantar cutaneous sensitivity have been identified as a critical age-related change, which is related to postural instability in the older population. Footwear is suggested that can modulate the postural stability by altering the interface between the foot sole and the ground. However, it is unclear whether this footwear effect could also influence lower limb muscle activation for the elderly. This study aimed to investigate the footwear insole texture and supporting surface condition on static postural stability and lower limb muscle activation for healthy older people. Methods: This is a single-session study with repeated measurements. Twenty-three healthy older female stood on the firm (i.e., concrete floor) and foam surfaces with their eyes open in the three footwear conditions, namely barefoot, plain shoes and nodulous insole shoes, for 30 seconds. Static postural sway and muscle activation of biceps femoris (BF), vastus lateralis (VL), tibialis anterior (TA), and lateral gastrocnemius (LG) of the dominant leg were measured during each testing condition. Results: compared to firm surface, standing on the foam could significantly increase the body sway and lower limb muscle activation (p<0.05); compared to barefoot, when standing on the foam, wearing footwear significantly decreased the VL and TA muscle activation and minimize the postural sway in ML and AP direction, while the influence is larger for the nodulous shoes compared to the plain shoes. A positive correlation was observed between the lower limb muscle activation and AP (r=0.327-0.389, p<0.001) and total sway path length (r=0.317-0.427, p<0.001). Conclusions: footwear could improve the postural stability and decease the fall risk comparing to barefoot when the somatosensory input is in disturbance, while the improvement is larger when wearing nodulous insole footwear for the elderly.


2021 ◽  
Vol 25 ◽  
pp. 133-139
Author(s):  
Jaqueline Mello Porto ◽  
Renato Campos Freire Júnior ◽  
Luciana Mendes Cangussu-Oliveira ◽  
Erika Leitner ◽  
Lara Gonçalves Freitas ◽  
...  

2021 ◽  
Vol 25 ◽  
pp. 151-156
Author(s):  
Albert Nunes Queiroz dos Santos ◽  
Thiago Lemos ◽  
Pedro Henrique Duarte Carvalho ◽  
Arthur Sá Ferreira ◽  
Julio Guilherme Silva

2020 ◽  
pp. 1-8
Author(s):  
Javad Sarvestan ◽  
Zuzana Kovacikova ◽  
Petr Linduska ◽  
Zuzana Gonosova ◽  
Zdenek Svoboda

2019 ◽  
Vol 71 (3) ◽  
pp. 250-260 ◽  
Author(s):  
Mélanie Le Berre ◽  
Mélanie Morin ◽  
Hélène Corriveau ◽  
Mathieu Hamel ◽  
Sylvie Nadeau ◽  
...  

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 230-230
Author(s):  
Daniela Abreu ◽  
Jaqueline Porto

Abstract The objective of the present study was to evaluate the ability of the five times sit to stand test (5TSST), grip strength (GS) and step test (ST) to detect older women with reduced lower-limb muscle strength (LLMS), and to investigate the clinical usefulness of the combination of such tests. One hundred and nineteen older women were submitted to the 5TSST, GS, ST and lower limb peak torque by an isokinetic dynamometer. The capacity of the clinical tests to detect older women with reduced LLMS was measured using the ROC curve, followed by calculation of posttest probability (PoTP). The results show that a ST score of 0.24 cm per cm of participant’s height shows the best PoTP for a positive test (72%). However, the combination of the ST and 5TSST enhances the accuracy from 48% (prevalence of weakness in the population) to 82.6% if both tests are positive, and decreases the PoTP from 48% to 11.4% if both tests are negative. The inclusion of GS provided additional benefits of small magnitude. In conclusion, the ST performed alone or in combination with 5TSST could be an alternative for clinical screening of LLMS reduction in older women. The early identification of impairment of lower-limb muscle strength in independent older adults may favor early intervention and prevention of negative outcomes such as falls and functional limitations.


2021 ◽  
Author(s):  
Hiroaki Omae ◽  
Takashi Ohsawa ◽  
Naohiro Hio ◽  
Kazuhiko Tsunoda ◽  
Takuya Omodaka ◽  
...  

Abstract Background: Hallux valgus deformity has been reported to be associated with increased postural sway. However, the direction and magnitude of postural sway associated with hallux valgus remain inconclusive. We assessed the association between hallux valgus deformity and postural sway using a force plate.Methods: The subjects were 169 healthy volunteers, >40 years old (63 males, 106 females, average age: 66.0 ± 12.4 years old), who took part in an annual medical examination. We investigated the photographic hallux valgus angle (°), total trajectory length of the gravity center fluctuation (mm), area of the center of pressure (mm2), mediolateral and anteroposterior postural sway (mm) in a standing position with 2-legged stance and eyes open, hallux pain (Numerical Rating Scale), trunk and lower limb muscle mass (kg). We classified the subjects into a hallux valgus group (n=44, photographic hallux valgus angle of 1 or both feet ≥20°) and a no hallux valgus group (n=125, photographic hallux valgus angle of both feet <20°) and analyzed the relationship between hallux valgus and postural sway. Results: The anteroposterior postural sway in the hallux valgus group (6.5 ± 2.8) was significantly greater than in the no hallux valgus group (5.4 ± 2.2, p=0.014), and the lower limb muscle mass in the hallux valgus group (12.4 ± 2.2) was significantly smaller than in the no hallux valgus group (13.5 ± 3.2, p=0.016). The total value of the photographic hallux valgus angle on both feet was positively correlated with the anteroposterior postural sway (p=0.021) and negatively correlated with the lower limb muscle mass (p=0.038). The presence of hallux valgus (p=0.024) and photographic hallux valgus angle were (p=0.008) independently related to the magnitude of anteroposterior postural sway. Conclusions: Hallux valgus deformity and its severity were positively associated with the magnitude of the anteroposterior postural sway. Trial registration: 2017-135. Registered 22 August 2017


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