The Effects of Lower Limb Muscle Activity on Postural Stability and Ground Type During Gait in Elderly Women

Woo, Byunghoon; Park, Yang-Sun

doi:10.5103/kjsb.2015.25.1.077

Cited by 4 publications

(3 citation statements)

References 16 publications

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“…The increased muscle activity in the OT and UT measured when using the RBH is thought to ensure gait stability in environments with obstacles or uneven ground. Our findings are commonly in line with a previous study which found that BF plays an important role in maintaining dynamic postural stability in older adults during walking [30]. It is suggested that the significant decrease in BF activity during the use of the RHH was influenced by the structural characteristics of the walker, which has a lift pedal and relatively large wheels.…”

Section: Discussionsupporting

confidence: 93%

The Effects of Structural Characteristics of the Rollator on the Elderly’s Gait Strategies in Various Walking Environments

Jung,

Kim

2023

Applied Sciences

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A rollator, one of the most widely used among walking assistance devices, can assist the elderly with stable walking in their daily lives. In this study, we investigated how the structural characteristics of two types of rollators affect the upper and lower extremity muscle activity and plantar pressure of the elderly in various walking environments. We quantified muscle activity (upper and lower limbs) and plantar pressure (mean force, peak pressure, and contact area) of 11 older adults walking in various environments (flat, obstacle, uneven, and sloped terrain) using two types of rollators. Upper extremity muscle activity was highest in the obstacle terrain and the uneven terrain, and a significant difference was found due to the structural differences of the rollator. Additionally, it was observed that lower extremity muscle activity and plantar pressure patterns appeared in accordance with the gait strategy to maintain stability in an unstable or inclined walking environment. In other words, it was confirmed that the weight of the rollator, the size of the wheel, grip type, and the auxiliary tools had a great effect on the upper and lower extremity muscle activity and plantar pressure of the elderly during walking. From the results of this study, it can be suggested that it is absolutely necessary to consider the biomechanical characteristics of the elderly and the structure of the rollator, which appear differently depending on the walking environment, in the development of walking aids. In the future, more clinical data will be collected, and based on this a rollator that can safely assist the elderly in various walking environments will be developed.

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Section: Discussionsupporting

confidence: 93%

The Effects of Structural Characteristics of the Rollator on the Elderly’s Gait Strategies in Various Walking Environments

Jung,

Kim

2023

Applied Sciences

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“…These vibratory stimuli artificially creates gravitational conditions for aviators in gravity-free space; thus, its original purpose was to prevent functional and morphological degradations of the skeletal system. Studies have shown that vibratory stimulations might have a positive effect on the respiratory, circulatory, nervous, and endocrine systems as well as on the muscle and skeletal systems (Cardinale & Bosco, 2003;Oh, Kang, Min, & Kwon, 2015;Woo & Park, 2015); since then, such stimulations have been expanded to include fields, such as physical therapy and rehabilitation (Remaud, Cornu, & Guével, 2009). …”

Section: Introductionmentioning

confidence: 99%

The Effect of Short-term Muscle Vibration on Knee Joint Torque and Muscle Firing Patterns during a Maximal Voluntary Isometric Contraction

Lee¹,

Song²,

Ahn³

et al. 2017

Korean Journal of Sport Biomechanics

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Objective: To investigate the effect of short-term vibration frequencies on muscle force generation capabilities.Method: Six healthy participants were recruited for this study and only their dominant leg was tested. The subjects were tested under five conditions of vibration frequencies with constant amplitude: 0 Hz (no vibration), 30 Hz, 60 Hz, and 90 Hz, and the vibration amplitude was 10 mm for all frequency conditions. The vibration was applied to the rectus femoris (RF). The subjects were then instructed to maintain a steadystate isometric knee joint torque (100 Nm) for the first 6 s. After the steady-state torque production, the subjects were required to produce isometric knee joint torque by leg extension as hard as possible with a start signal within the next 3 s. The vibration was applied for ~4 s starting from 1 s before initiation of the change in the steady-state knee joint torque. Results:The results showed that the maximum voluntary torque (MVT) of the knee joint increased with the vibration frequencies. On average, the MVTs were 756.47 Nm for 0 Hz (no vibration) and 809.61 Nm for 90 Hz. There was a significant positive correlation (r = 0.71) between the MVTs and integrated electromyograms (iEMGs). Further, the co-contraction indices (CCIs) were computed, which represent the ratio of the iEMGs of the antagonist muscle to the iEMGs of all involved muscles. There was a significant negative correlation (r = 0.62) between the CCIs and MVTs, which was accompanied by a significant positive correlation (r = 0.69) between the iEMGs of the vibrated muscle (RF). There was no significant correlation between the MVTs and iEMGs of the antagonist muscle. Conclusion:The results of this study suggest that the short-term vibration on the muscle increases the level of muscle activation possibly owing to the increased Ia afferent activities, which enhances the muscle force generation capability.

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“…보행각도에 따른 충격의 크기에 대한 연구들은 이루어 져 있지만 (Kwon, 2001;Jung, 2004) 65세 이상 노인들의 33%가 매년 낙상하고 그중 50% 는 다시 낙상한다고 보고되고 있다 (Moreland et al, 2003). 주로 보행 시 발생하는 낙상 문제는 노인의 균 형 감각과도 밀접한 관련을 있을 뿐 아니라, 노화에 따른 고유수용감각기능의 결여와도 관련이 높다 (Woo & Park, 2015). 노인들의 보행 박자는 크게 변화가 없 지만 (Kerrigan et al, 1998;Cromwell et al, 2001), 노 인들이 같은 수의 걸음걸이로 보다 짧은 거리를 이동 하게 되면서 자연 보장이 짧아지고 보다 안정된 보행 을 위하여 두 발이 지면에 있는 시간은 길어지게 된다 (Cromwell et al, 2001 (Abellan et al, 2009;Abellan et al, 2010;Pamoukdjian et al, 2015).…”

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An analysis on the Comparison of the Center of Pressure, Gait Angle, and Gait Time between Female College Students and Elderly Women

Kim¹,

Kang²

2017

Asian J Kinesiol

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Dae-gun Kim•Hyun-Joo Kang. An analysis on the Comparison of the Center of Pressure, Gait Angle, and Gait Time between Female College Students and Elderly Women. KINESIOLOGY, 2017, 19(2): 61-67. [PURPOSE] Gait pattern has been reported one of major predictors of adverse outcomes in the elderly. The purpose of this study was to investigate the effects of aging on center of pressure, gait angle and gait time. [METHODS] 29 healthy female college students(FCS) and 28 elderly women(EW) were recruited for this study. A gait analysis system(Gaitview, Korea) was used to collect the center of pressure in static state and gait angle with gait time in dynamic state. [RESULTS] Results of the center of pressure did not show significant differences between two groups. In the gait angle test, the FCS showed 1.56±5.2°on their left while the EW showed 9.76±6.54°o n their left. In their right, the FCS showed 2.85±6.47°and the EW showed 10.27±6.97°. In the gait angle test, there was significant difference. A significant difference was evident in the gait time. the FCS on the left was 0.87±0.1sec while the EW's was 1.28±0.44sec. The FCS on the right was 0.86±0.09sec and the EW was 1.1±0.21sec. The results revealed that the decrease in the musculoskeletal system and changes in posture through aging make the gait angle. Elderly may need to leave their feet on the ground longer for stability slowing their movement. [CONCLUSIONS] In conclusion, it is advisable to develop an exercise program for the elderly focusing on stability the prevention of falls.

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The Effects of Lower Limb Muscle Activity on Postural Stability and Ground Type During Gait in Elderly Women

Cited by 4 publications

References 16 publications

The Effects of Structural Characteristics of the Rollator on the Elderly’s Gait Strategies in Various Walking Environments

The Effects of Structural Characteristics of the Rollator on the Elderly’s Gait Strategies in Various Walking Environments

The Effect of Short-term Muscle Vibration on Knee Joint Torque and Muscle Firing Patterns during a Maximal Voluntary Isometric Contraction

An analysis on the Comparison of the Center of Pressure, Gait Angle, and Gait Time between Female College Students and Elderly Women

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