Objective: The purpose of this study was to develop and investigate the feasibility of a sit-to-stand assistive chair using a pneumatic cylinder. Design: Cross-sectional study. Methods: The sit-to-stand assistive chair was developed to assist the sit-to-stand movement by rising up of the chair by a ...
Objective: The purpose of this study was to develop and investigate the feasibility of a sit-to-stand assistive chair using a pneumatic cylinder. Design: Cross-sectional study. Methods: The sit-to-stand assistive chair was developed to assist the sit-to-stand movement by rising up of the chair by a pneumatic cylinder. After the user is seated on the chair, if the pneumatic cylinder pulls the seat plate when standing up, the spring of the pneumatic cylinder, which has been stretched, assists in rising the rear end of the seat plate so that the user can stand conveniently and comfortably. A feasibility test was performed in 10 heathy adults. The electromyographic muscle activation of the trunk and lower extremity muscles was analyzed, which included the erector spinae, rectus abdominis, quadriceps, tibialis anterior, gastrocnemius when standing up from sitting using the developed chair and standing up without using the developed chair. Results: As a result, the sit-to-stand assistive chair using a pneumatic cylinder was developed. In the feasibility test, the use of the developed chair had a decrease in rectus abdominis, quadriceps, tibialis anterior activation compared to those who did not use the device in the healthy adults. Conclusions: The sit-to-stand assistive chair using a pneumatic cylinder may be helpful to reduce the activation of the rectus abdominis, quadriceps, tibialis anterior muscles when performing a sit-to-stand movement. Through the results, the efficacy of the sit-to-stand assistive chair can be confirmed. In the future, further studies are warranted to investigate for the safety and efficacy of its use in the elderly population or those who are disabled.
Objective: The purpose of this study was to develop and investigate the feasibility of a sit-to-stand assistive chair using a pneumatic cylinder. Design: Cross-sectional study. Methods: The sit-to-stand assistive chair was developed to assist the sit-to-stand movement by rising up of the chair by a pneumatic cylinder. After the user is seated on the chair, if the pneumatic cylinder pulls the seat plate when standing up, the spring of the pneumatic cylinder, which has been stretched, assists in rising the rear end of the seat plate so that the user can stand conveniently and comfortably. A feasibility test was performed in 10 heathy adults. The electromyographic muscle activation of the trunk and lower extremity muscles was analyzed, which included the erector spinae, rectus abdominis, quadriceps, tibialis anterior, gastrocnemius when standing up from sitting using the developed chair and standing up without using the developed chair. Results: As a result, the sit-to-stand assistive chair using a pneumatic cylinder was developed. In the feasibility test, the use of the developed chair had a decrease in rectus abdominis, quadriceps, tibialis anterior activation compared to those who did not use the device in the healthy adults. Conclusions: The sit-to-stand assistive chair using a pneumatic cylinder may be helpful to reduce the activation of the rectus abdominis, quadriceps, tibialis anterior muscles when performing a sit-to-stand movement. Through the results, the efficacy of the sit-to-stand assistive chair can be confirmed. In the future, further studies are warranted to investigate for the safety and efficacy of its use in the elderly population or those who are disabled.
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제안 방법
In order to supplement the limitations of existing devices, this study attempted to develop a standing assist device using a pneumatic cylinder, and also investigated the validity of the developed device.
In this study, a standing assistance device was developed using a pneumatic cylinder that can assist with standing, which is a movement that includes sitting and standing, and the activity of the trunk and lower extremity muscles that appear when standing up was analyzed using the device for 10 healthy adults. The validity of the device was investigated.
The pneumatic cylinder used in this device is a device operated by compressed air and has a disadvantage in that it exhibits a limitation in mechanically high pressure [9], but it has the advantage of being able to control the force and speed without limitations, and it is economical and reliable and so it is widely used in the industry [10]. In this study, in order to compensate for the limitations of the existing device, a sit-to-stand assistive chair device was developed using an economical and easy-to-use pneumatic cylinder, and the feasibility of the device was investigated.
대상 데이터
In this study, the activity of the trunk and lower extremity muscles when standing without using the developed device and when standing with the developed device was analyzed using surface electromyography (EMG) in 10 healthy adults, and the general characteristics of the participants in this study are shown in Table 1.
The device consists of the leg components, a seat plate, seat plate moving slide, back frame, handle for fixing and releasing, and a pneumatic cylinder (Figure 1).
성능/효과
As a result, it was found that the activity of the right rectus abdominis, the right and left quadriceps femoris, and right anterior tibialis muscles decreased when standing with the device compared to standing without the device. The decrease in muscle mass that occurs as aging progresses decreases by about 10%-15% every 10 years until the person reaches their 70s, and decreases more rapidly to 25%-40% every 10 years after the 70s age range [11].
In this study, a standing assist device using a pneumatic cylinder was developed, and as a result of the validity evaluation of the developed device, it was found that the activity of muscles used when standing was decreased. These results show the potential that the device can be used for standing assistance.
후속연구
However, since this device cannot provide assistance according to the user’s weight or physical disability, it will have to be continuously improved and developed, and the improved and developed device will be compared with other similar devices for differentiation and verification for excellence.
In addition, since the evaluation for the validity of this device was conducted on healthy adults only, it is necessary to continue to investigate for the validity of its use within the elderly population or those who are disabled who have difficulties with standing.
참고문헌 (13)
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Chou SW, Wong AM, Leong CP, Hong WS, Tang FT, Lin TH. Postural control during sit-to stand and gait in stroke patients. Am J Phys Med Rehabil 2003;82:42-7.
Hughes VA, Frontera WR, Wood M, Evans WJ, Dallal GE, Roubenoff R, et al. Longitudinal muscle strength changes in older adults: influence of muscle mass, physical activity, and health. J Gerontol A Biol Sci Med Sci 2001;56:B209-17.
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Camargos AC, Rodrigues-de-Paula-Goulart F, Teixeira-Salmela LF. The effects of foot position on the performance of the sit-tostand movement with chronic stroke subjects. Arch Phys Med Rehabil 2009;90:314-9.
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