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Journal ArticleDOI

Fundamental Locomotive Activity Time Efficiency with Differently Positioning Drive-Axis Wheelchairs Among Elderly: 2388

TL;DR: Using arms and legs simultaneously propelling wheelchairs was more time efficient than using the arms or legs only in the selected locomotive activities.
Abstract: This study examined time efficiency in wheelchair locomotive activities among four different wheelchairs propelled by elders with arms and/or legs. Sixteen elder manual wheelchair users propelled her/his own wheelchair and three wheelchairs (the main drive-axis wheels positioning in front, middle, and rear, respectively) in the test of seven wheelchair locomotive activities of daily living. A Mixed-Model ANOVA and Bonferroni post hoc test (p < .05) were employed to determine the time efficiency among four wheelchairs and three groups. The results demonstrated better time efficiency resulted from propelling the mid drive-axis and/or rear drive-axis wheelchairs; using arms and legs simultaneously propelling wheelchairs was more time efficient than using the arms or legs only in the selected locomotive activities.
Citations
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Journal ArticleDOI
01 Mar 2014
TL;DR: Partitioning KE offers a useful means of investigating the dynamics of a moving wheelchair and can be used to study the effort required to maneuver different types and configurations of wheelchairs.
Abstract: This paper describes a systematic method to partition the kinetic energy (KE) of a free-wheeling wheelchair. An ultralightweight rigid frame wheelchair was instrumented with two axle-mounted encoders and data acquisition equipment to accurately measure the velocity of the drive wheels. A mathematical model was created combining physical specifications and geometry of the wheelchair and its components. Two able-bodied subjects propelled the wheelchair over four courses that involved straight and turning maneuvers at differing speeds. The KE of the wheelchair was divided into three components: translational, rotational, and turning energy. This technique was sensitive to the changing contributions of the three energy components across maneuvers. Translational energy represented the major component of total KE in all maneuvers except a zero radius turn in which turning energy was dominant. Both translational and rotational energies are directly related to wheelchair speed. Partitioning KE offers a useful means of investigating the dynamics of a moving wheelchair. The described technique permits analysis of KE imparted to the wheelchair during maneuvers involving changes in speed and direction, which are most representative of mobility in everyday life. This technique can be used to study the effort required to maneuver different types and configurations of wheelchairs.

25 citations


Cites methods from "Fundamental Locomotive Activity Tim..."

  • ...2289378 activities [2], effective handrim forces [3], [4], and metabolic cost have been used to determine efficiency of manual propulsion [5], [6]....

    [...]

Journal ArticleDOI
TL;DR: The findings suggest an overall positive influence of PA on various ICF domains/subdomains, but initial findings should be interpreted with caution.
Abstract: Manual wheelchair (MWC) users face a variety of obstacles limiting their participation. Different MWC models and new add-on components intended to improve propulsion may impact users’ function and ...

12 citations

Dissertation
01 Feb 2016
TL;DR: Results are promising on identifying relevant dose and protocol endpoints implementing dose-finding and repetitive assessments approaches in stroke rehabilitation, and a lack of reliable approaches to dose optimization in exercise-based training.
Abstract: Background: the dose and the length of rehabilitative interventions for optimal motor recovery after stroke are unknown. Dose optimization studies are required as precursors to efficacy trials, but are rarely conducted in stroke rehabilitation research. Objective: to overcome the knowledge gap on appropriate dose and length of rehabilitative interventions guiding the implementation of novel effective approaches to dose optimization in stroke rehabilitation research. Method: two systematic reviews on dose optimization in exercise-based training and pharmaceutical clinical research guided the development of a new approach to dose-finding suitable for physical interventions. The feasibility of a novel phase I 3+3 rule-based, outcome-adaptive dose-finding design was assessed with stroke survivors with moderate upper limb paresis. Moreover, the feasibility of a repetitive assessment procedure to identify the appropriate length of motor interventions was explored in stroke rehabilitation research. Results: the first literature review showed a lack of reliable approaches to dose optimization in exercise-based training. The review of pharmaceutical research highlighted dose optimization “gold” standard approaches, and helped in devising the dose-finding study for physical intervention. The dose-finding study was feasible using the applied model-task intervention. Preliminary explorations on the dose-response relationship were possible indicating a maximum tolerable dose and a potential recommended dose of 209 and 162 repetitions respectively of the applied intervention-task. The repetitive assessment procedure was found feasible in a clinical efficacy stroke rehabilitative trial. The repetitive assessment procedure provided relevant data on the therapy effect over-time showing that more than six weeks of the applied upper limb intervention may be necessary to reach maximal therapy effects. Whereas, five weeks of intervention appeared enough to exploit therapy effects for the lower limb. Conclusions: results are promising on identifying relevant dose and protocol endpoints implementing dose-finding and repetitive assessments approaches in stroke rehabilitation. Further confirmative data are needed to validate these findings.

6 citations

Proceedings ArticleDOI
01 Apr 2015
TL;DR: Experimental results and analyses show that a smart wheelchair with embedded sensor system for vital signs and smart biosensors can provide the aged and disabled people with better U-healthcare.
Abstract: Aiming to offer better ubiquitous healthcare (Uhealthcare) to the aged and the disabled, this paper introduce a smart wheelchair with embedded sensor system for vital signs which can be controlled by simple gestures. In motion control module, firstly the gesture is distinguished from background using depth images from Kinect. Then three detailed formulas are added to Hu Invariant Moments for hand gesture recognition. Finally, recognition results are transmitted to a host computer via USB 2.0 interface for implementing motion control. In sensor sub-system module, a microcontroller-based platform is designed to process the signals required from biomedical sensors embedded in the wheelchair and output signals are transmitted wirelessly using IEEE802.15.4 WPAN protocol to a server application implemented in a host computer. Physiological parameters are measured by photoplethysmography (PPG), ballistocardiography (BCG) and skin conductivity sensor. Experimental results and analyses show that such a smart wheelchair can provide the aged and disabled people with better U-healthcare. Keywords-U-healthcare; smart biosensors; IEEE1451 standard; Hu Invariant Moment; intelligent wheelchair.

1 citations

References
More filters
Journal ArticleDOI
01 Mar 2014
TL;DR: Partitioning KE offers a useful means of investigating the dynamics of a moving wheelchair and can be used to study the effort required to maneuver different types and configurations of wheelchairs.
Abstract: This paper describes a systematic method to partition the kinetic energy (KE) of a free-wheeling wheelchair. An ultralightweight rigid frame wheelchair was instrumented with two axle-mounted encoders and data acquisition equipment to accurately measure the velocity of the drive wheels. A mathematical model was created combining physical specifications and geometry of the wheelchair and its components. Two able-bodied subjects propelled the wheelchair over four courses that involved straight and turning maneuvers at differing speeds. The KE of the wheelchair was divided into three components: translational, rotational, and turning energy. This technique was sensitive to the changing contributions of the three energy components across maneuvers. Translational energy represented the major component of total KE in all maneuvers except a zero radius turn in which turning energy was dominant. Both translational and rotational energies are directly related to wheelchair speed. Partitioning KE offers a useful means of investigating the dynamics of a moving wheelchair. The described technique permits analysis of KE imparted to the wheelchair during maneuvers involving changes in speed and direction, which are most representative of mobility in everyday life. This technique can be used to study the effort required to maneuver different types and configurations of wheelchairs.

25 citations

Journal ArticleDOI
TL;DR: The findings suggest an overall positive influence of PA on various ICF domains/subdomains, but initial findings should be interpreted with caution.
Abstract: Manual wheelchair (MWC) users face a variety of obstacles limiting their participation. Different MWC models and new add-on components intended to improve propulsion may impact users’ function and ...

12 citations

Dissertation
01 Feb 2016
TL;DR: Results are promising on identifying relevant dose and protocol endpoints implementing dose-finding and repetitive assessments approaches in stroke rehabilitation, and a lack of reliable approaches to dose optimization in exercise-based training.
Abstract: Background: the dose and the length of rehabilitative interventions for optimal motor recovery after stroke are unknown. Dose optimization studies are required as precursors to efficacy trials, but are rarely conducted in stroke rehabilitation research. Objective: to overcome the knowledge gap on appropriate dose and length of rehabilitative interventions guiding the implementation of novel effective approaches to dose optimization in stroke rehabilitation research. Method: two systematic reviews on dose optimization in exercise-based training and pharmaceutical clinical research guided the development of a new approach to dose-finding suitable for physical interventions. The feasibility of a novel phase I 3+3 rule-based, outcome-adaptive dose-finding design was assessed with stroke survivors with moderate upper limb paresis. Moreover, the feasibility of a repetitive assessment procedure to identify the appropriate length of motor interventions was explored in stroke rehabilitation research. Results: the first literature review showed a lack of reliable approaches to dose optimization in exercise-based training. The review of pharmaceutical research highlighted dose optimization “gold” standard approaches, and helped in devising the dose-finding study for physical intervention. The dose-finding study was feasible using the applied model-task intervention. Preliminary explorations on the dose-response relationship were possible indicating a maximum tolerable dose and a potential recommended dose of 209 and 162 repetitions respectively of the applied intervention-task. The repetitive assessment procedure was found feasible in a clinical efficacy stroke rehabilitative trial. The repetitive assessment procedure provided relevant data on the therapy effect over-time showing that more than six weeks of the applied upper limb intervention may be necessary to reach maximal therapy effects. Whereas, five weeks of intervention appeared enough to exploit therapy effects for the lower limb. Conclusions: results are promising on identifying relevant dose and protocol endpoints implementing dose-finding and repetitive assessments approaches in stroke rehabilitation. Further confirmative data are needed to validate these findings.

6 citations