Using a body sensor network to measure the effect of fatigue on stair climbing performance
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Abstract:
In terms of self-rated health, the most important activities of daily living are those involving mobility. Of these activities stair climbing is regarded as the most strenuous. A loss of stair climbing ability with age is normally associated with a loss of muscle strength and power, while other factors that influence muscle function, such as fatigue, are often not taken into account. So far no research has been published on how long-lasting fatigue affects activities of daily living, despite the fact that it has been repeatedly proven, in laboratory settings, to influence muscle force production over long periods of time. Technological advances in body sensor networks (BSNs) now provide a method to measure performance during complex real-life situations. In this study the use of a BSN was explored to investigate the effects of long-lasting fatigue on stair climbing performance in 20 healthy adults. Stair climbing performance was measured before and after a fatiguing protocol using a BSN. Performance was defined by temporal and spatial parameters. Long-lasting fatigue was successfully induced in all participants using an exercise protocol. The BSN showed that post-exercise fatigue did not influence stair climbing times (p > 0.2) and no meaningful changes in joint angles were found. No effect on overall stair climbing performance was found, despite a clear presence of long-lasting fatigue. This study shows that physiological paradigms can be further explored using BSNs. Ecological validity of lab-based measurements can be increased by combining them with BSNs.Keywords:
Stair climbing
Climbing
Muscle Fatigue
To assist stair climbing movement for ALS patients and patients with spinal cord injury, we are developing a stair climbing machine. Although most stair climbing machine adopt crawler mechanism, crawler system has some problems such as damaging floor and slip dropping. Therefore, we adopt linkage mechanism for stair climbing. This device has advantage that users can keep their posture horizontally．
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Stair climbing is one of the most challenging tasks for vehicles, especially when transporting people and heavy loads. Although many solutions have been proposed and demonstrated in practice, it is necessary to further improve their climbing ability and safety. This paper presents a systematic review of the scientific and engineering stair climbing literature, providing brief descriptions of the mechanism and method of operation and highlighting the advantages and disadvantages of different types of climbing platform. To quantitatively evaluate the system performance, various metrics are presented that consider allowable payload, maximum climbing speed, maximum crossable slope, transport ability and their combinations. Using these metrics, it is possible to compare vehicles with different locomotion modes and properties, allowing researchers and practitioners to gain in-depth knowledge of stair-climbing vehicles and choose the best category for transporting people and heavy loads up a flight of stairs.
Climbing
Stair climbing
Stairs
Payload (computing)
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effects of manipulation of indoor climbing route ratings on the climbing self-efficacy of 90 indoor rock climbers. Controversy surrounding the accuracy of the assigned ratings of indoor climbing routes is commonplace at indoor climbing facilities. For indoor rock climbers to accurately assess their abilities, set appropriate goals, and monitor their progress, they must be able to choose climbs that accurately represent their desired level of challenge. Statistical analysis of the data did not support a relationship between manipulation of climbing route ratings and any changes in participant climbing self-efficacy. Additionally, participant perceptions of the accuracy of the stated climbing route ratings for the under and over-rated experimental groups were not found to be significantly different (p < .05) than that of the control group.
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The purpose of this study was to compare the joint angles and muscle activations between simulated stair-climbing machine and general ladder. Twelve male healthy undergraduate students (aged 23.7±0.4 yrs, height 172.17±2.45 cm, weight 68.92±3.35 kg) were randomly assigned into the stair-climbing simulation machine and general ladder at two ladder angles (75 and 90 degrees) using a repeated measures design. A 300 Hz high-speed camera was used to record the climbing movements for the analysis of joint angles, and surface electromyography was used to collect the major muscle activations. After a paired t test, the results of kinematics showed that there were no significant differences in all joint angles of the upper and lower limbs between simulated stair-climbing machine and general ladder at the 75 degree ladder angle. Furthermore, no significant differences in most of the joint angles of the upper and lower limbs were recorded between both at the 90 degree ladder angle. The results of muscle activations showed that there were significant differences in some of the muscles between the simulated stair-climbing machine and general ladder at the 75 and 90 degrees ladder angles. Moreover, muscle activations during climbing the stair-climbing machine were generally smaller than those during climbing the general ladder. In conclusion, although the muscle activations had some differences between climbing the stair-climbing simulation machine and general ladder groups, climbing movements of upper and lower extremities were almost the same.
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Stair climbing
Hill climbing
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The apparent slope of a hill, termed geographical slant perception, is overestimated in explicit awareness. Proffitt (2006) argued that overestimation allows individuals to manage their locomotor resources. Increasing age, fatigue, and wearing a heavy back pack will reduce the available resources and result in steeper reports for a particular hill. In contrast, Durgin and colleagues have proposed an alternative explanation for these effects based on experimental design-particularly, the potential effects of experimental demand. Proffitt's resource-based model would predict that pedestrians with reduced resources should avoid climbing a hill that would further deplete their resources if the opportunity arose. Within the built environment, stairs are the man-made equivalent of relatively steep hills (20°-30°). In many public access settings, pedestrians can avoid climbing the stairs by opting for an adjacent escalator. Observations of pedestrian behavior in shopping malls reveal that 94.5 % do so. This article summarizes the effects of demographic grouping on avoidance of stairs in public health research. Observations in shopping malls (n = 355,069) and travel contexts (n = 711,867) provide data consistent with Proffitt's resource model. Women, the old, and those carrying excess body weight or large bags avoid the stairs more than do their comparison groups. Discussion focuses on differences in physiology that may underlie avoidance of stair climbing in order to highlight the pedestrian behavior that psychology needs to explain.
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Stair climbing
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The purpose of this study was to describe the relationships between perceived limitations in stair climbing and self-reported stair climbing activity, muscle strength, and adiposity. The study involved the cross-sectional examination of community-dwelling men (n = 32) and women (n = 107) aged at least 65 years. Perceived limitations in climbing one and several flights of stairs were identified by responses to items of the Short-Form 36. Lower limb strength was indicated by the 5 repetition sit-to-stand test. Adiposity was characterized by body mass index. Stair climbing activity was reflected by self-report of flights climbed daily. Stair climbing limitations were common among the participants. Correlational analysis showed low but significant correlations between stair climbing limitations and stair climbing activity, adiposity, and lower limb strength. Regression analysis demonstrated that the 3 independent variables combined together predicted 36.8% of the variance in limitations in climbing a single flight of stairs, and that the stair flights climbed and lower limb strength explained 22.1% of the variance in climbing several flights of stairs. While the design of the study precludes attributing cause, it appears that stair climbing limitations might be assuaged through reduction of adiposity and augmentation of lower limb strength. Stair climbing activity itself may have a direct or indirect effect on stair climbing limitations.
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Stairs
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In order to assist stair climbing movement for ALS patients and patients with spinal cord injury, we are developing a stair climbing machine. Although most stair climbing machine adopt crawler mechanism, crawler system has some problems such as damaging floor and slip dropping. Therefore, we adopt linkage mechanism for stair climbing. This device also has advantage that users can keep their posture horizontally．In this paper, we describe development of real size device which user can ride on.
Climbing
Stair climbing
Web crawler
Linkage (software)
Hill climbing
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In order to assist stair climbing movement for ALS patients and patients with spinal cord injury, we are developing a stair climbing machine. Although most stair climbing machine adopt crawler mechanism, crawler system has some problems such as damaging floor and slip dropping. Therefore, we adopt linkage mechanism for stair climbing. This device also has advantage that users can keep their posture horizontally．In this paper, we describe this device’s mechanism which can transfer its center of gravity in a horizontal direction.
Climbing
Stair climbing
Web crawler
Linkage (software)
Crawling
Hill climbing
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Citations (0)
In terms of self-rated health, the most important activities of daily living are those involving mobility. Of these activities stair climbing is regarded as the most strenuous. A loss of stair climbing ability with age is normally associated with a loss of muscle strength and power, while other factors that influence muscle function, such as fatigue, are often not taken into account. So far no research has been published on how long-lasting fatigue affects activities of daily living, despite the fact that it has been repeatedly proven, in laboratory settings, to influence muscle force production over long periods of time. Technological advances in body sensor networks (BSNs) now provide a method to measure performance during complex real-life situations. In this study the use of a BSN was explored to investigate the effects of long-lasting fatigue on stair climbing performance in 20 healthy adults. Stair climbing performance was measured before and after a fatiguing protocol using a BSN. Performance was defined by temporal and spatial parameters. Long-lasting fatigue was successfully induced in all participants using an exercise protocol. The BSN showed that post-exercise fatigue did not influence stair climbing times (p > 0.2) and no meaningful changes in joint angles were found. No effect on overall stair climbing performance was found, despite a clear presence of long-lasting fatigue. This study shows that physiological paradigms can be further explored using BSNs. Ecological validity of lab-based measurements can be increased by combining them with BSNs.
Stair climbing
Climbing
Muscle Fatigue
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Citations (13)
The purpose of this research was to develop a scale that would measure the motivation for participation of rock climbing subgroups, determine what differences exist among rock climbing subgroups and confirm the Rock Climbers' Attitudes toward Management Scale. Respondents were given an on-site questionnaire at three rock climbing areas in the United States. Respondents identified themselves according to their preferred type of climbing (e.g., traditional climbing, sport climbing, and hybrid climbing) and their preferred mode of climbing (e.g., lead climbing, top roping, and both equally). Exploratory factor analysis identified five factors for the Rock Climbing Motivation Scale: competition, control, escape, sensation seeking, and social. An analysis of variance confirmed there were no significant differences among types of climbers on the Rock Climbers' Motivation Scale or Rock Climbers' Attitudes toward Management Scale, contrary to previously reported findings. Mode of climbing was found to be a significant predicator of frequency of use, years of experience was found to be a significant predictor of frequency of use, and level of climbing ability was found to be a significant predictor of mode of climbing. The results of this study were then applied to the Benefits-Based Management Approach.
Climbing
Exploratory factor analysis
Hill climbing
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