Sit-to-Stand Movement in Elderly Adults.

Kojima, Satoru; Takeda, Hirofumi

doi:10.1589/rika.13.85

Cited by 14 publications

(11 citation statements)

References 7 publications

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“…In the first phase, the body centroid is moved forward by leaning, and buttock lifting is achieved through horizontal momentum. 20 With the rotational mechanism used in this study, the buttocks and the thigh can be supported with a wide seat in the standing-up segment 2 ○ when the seat rotates. 18,19 In the first phase, the important thing is the trunk's tilt angle and velocity; in the second phase, the important thing is postural control by moving the body centroid from a wide supporting base of the buttocks and the thigh to a narrow plantar supporting base.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, the distance between body centroid and floor contact area (feet) is reduced to improve stability in standing-up motion, but a strong muscle force may be required. 20 With the rotational mechanism used in this study, the buttocks and the thigh can be supported with a wide seat in the standing-up segment 2 ○ when the seat rotates. As a result, horizontal momentum produced the trunk forward movement required in the first phase is reduced, while the abrupt change of supporting base from the buttocks and the thigh to the feet is avoided; thus, one can expect for reduction of joint torques.…”

Section: Resultsmentioning

confidence: 99%

“…As can be seen from Table 2, in case of round back posture, Δ T tends to increase, whilėtends to decrease as compared to health persons, regardless of the use of the system; this agrees with previous research results. [20][21][22] One can assume that with Senior Pose, hip joint extension is restricted, and the effect of trunk extension-flexion is inhibited; thus, T R due to static body centroid motion is utilized. Now consider the two subjects that did not show significant difference.…”

Section: Body Trunk Angle and Angular Velocitymentioning

confidence: 99%

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Evaluation of Standing-Sitting Support System with Passive Rotational Seat Mechanism in Standing Motion

et al. 2018

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Since a decrease in muscle mass of elderly people, the physical burden of them in standing-sitting motion of a seat are increasing than young people. For this problem, several standing-sitting support systems have been developed, and evaluations of these systems focusing on a reduction of physical load have been discussed. However, these evaluations are of support systems with an active actuators or of support systems when they use a handrail and a standing aid. Thus, an evaluation of a support system with only passive actuators has not been reported. In this paper, in standing motion with using a standing-sitting support system with passive rotational seat mechanism which our group proposes, we objectively evaluate an effectiveness of the passive rotational seat mechanism by statistical analysis. K E Y W O R D Sjoint torque, passive rotational seat mechanism, standing-sitting support system, trunk forward motion 16

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Body Trunk Angle and Angular Velocitymentioning

confidence: 99%

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Evaluation of Standing-Sitting Support System with Passive Rotational Seat Mechanism in Standing Motion

et al. 2018

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“…Kojima et al 18) reported that elderly subjects could not perform STS motion from a chair with a 20 cm seat height; an increase in total STS motion time, trunk anteversion angle at buttocks off, and a decrement of the maximum horizontal velocity of the COG were seen. In this study, STS motion from 0 mm (no cushion) in the difficult group showed prolongation of the total STS motion time, decrease of the maximum horizontal velocity of the COG, and increase of the hip flexion angle.…”

Section: Discussionmentioning

confidence: 99%

“…Kojima et al 18) reported that subjects of a difficult older group did STS motion in a less energy-required and stability-regarded pattern compared to healthy younger subjects. Generally, from the aspect of energy, the energy required for STS motion from any chair with the same seat height is the same value even though the rising pattern is different, and the higher the stress on the larger joints the lesser the stress the subject feels 24) .…”

Section: Discussionmentioning

confidence: 99%

Effects of Variation in Cushion Thickness on the Sit-to-Stand Motion of Elderly People

Anan¹,

Okumura

Kito

et al. 2008

J Phys Ther Sci

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Abstract. This study was done to investigate whether cushion thickness affected elderly people during the sit-to-stand motion (STS motion). Fourteen elderly subjects aged 79 or over were recruited from the outpatients at a rehabilitation clinic. Their STS motions were evaluated and analyzed using a digital video camera and analyzing software. As the thickness of the cushion increased, it was difficult to identify the pelvic movement during STS motion, although the trunk was inclined more anteriorily and the load to the knee extensors was greater. Furthermore, three of the fourteen subjects had difficulties performing STS motion when the pelvis was contoured by a thick cushion. These results suggests that if an older person has a knee extensor strength below an appropriate level and/or the cushion thickness is enough large to contour the subject's pelvis, the risk of falling during STS motion is higher.

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A comprehensive analysis of sit‐to‐stand movement in a living space involving principal component analysis

HARAGUCHI

Ogawa

Mita

2022

Japan Architectural Review

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Sit‐to‐stand (STS) movement is a frequently performed activity of daily living. The analysis of STS movement can lead to the early detection of a decline in physical functioning. There is thus interest in home‐based STS monitoring systems. The present study (1) extracted universal differences by age group in common STS movements of daily life and (2) clarified where the differences between age groups lie in the sequence of movements. We experimented to measure the three patterns of STS movement assumed to be performed in living spaces. Ten young adults and seventeen elderly people participated. Data were acquired by an Azure Kinect DK, an RGB‐D camera, and converted into angles and angular velocities of the major body segments. Principal component analysis was applied to the overall time series data. From the synthesized principal component space, principal components with significant differences between the elderly and young‐adult groups were extracted, and the movements of the elderly participants were evaluated. We found parameters and movement strategies that show the characteristics of each age group for each movement pattern. The results of this study can contribute to the design of home‐based STS monitoring systems.

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Sit-to-Stand Movement in Elderly Adults.

Cited by 14 publications

References 7 publications

Evaluation of Standing-Sitting Support System with Passive Rotational Seat Mechanism in Standing Motion

Evaluation of Standing-Sitting Support System with Passive Rotational Seat Mechanism in Standing Motion

Effects of Variation in Cushion Thickness on the Sit-to-Stand Motion of Elderly People

A comprehensive analysis of sit‐to‐stand movement in a living space involving principal component analysis

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