Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 424-439). Available also in a digital version from Dissertation Abstracts.

published_or_final_version / Medical Sciences / Master / Master of Medical Sciences

Not available / text

Walking for active transportation (AT) has been associated with individuals meeting the recommended physical activity levels. Global and local (i.e., Saskatoon) reported walking rates are low. Barriers perceived as a challenge (i.e., frequent and limiting) may influence walking. Individual differences, such as self-regulatory efficacy (SRE), may help people persist in overcoming challenging barriers, with those being more efficacious having greater persistence than their lower efficacy counterparts. The overall purpose of the present self-efficacy theory-based study was to examine whether individuals with higher and lower SRE differed in their persistence to overcome barriers to walking to/from a university campus under two experimental conditions (i.e., higher versus lower challenge). The experimental study design was a two (between: higher versus lower SRE to overcome barriers) by two (within: higher versus lower challenge vignette) mixed factorial, with three measures of persistence as the dependent variables (i.e., number of written solutions to overcoming barriers, time taken to record the solutions, and anticipatory perseverance to overcome barriers to walking in the near future). Based on self-efficacy theory and past research, individuals who had higher SRE were expected to have significantly higher persistence than their lower SRE counterparts after reading the higher challenge vignette. Participants were young adults who walked to/from a university campus. Higher and lower SRE groups were identified via a median split (nhigher = 22; nlower = 23). Each participant read a higher and lower challenge vignette (i.e., order counterbalanced across participants) in a lab-based setting, followed by completion of persistence measures after each vignette reading. Findings from a series of two by two ANOVAS provided partial support of the study hypothesis. A significant interaction between SRE groups and challenge vignettes was found with the persistence measure of time spent reporting coping solutions, F(1,43) = 4.64, p = .037. As expected, results from simple main effects showed the higher SRE group significantly differed from the lower SRE group under the higher challenge vignette condition, F (1,43) = 5.27, p = .027, by spending significantly more time reporting solutions. No other significant interactions were found between SRE groups x vignettes with the remaining measures of persistence: (1) number of reported solutions F (1,43) = 3.15, p = .083, and (2) anticipatory perseverance F (1,43) = 0.05, p = .82. The present study contributed new information on challenging barriers to walking for AT. Findings from the experiment partially supported contentions from self-efficacy theory about the importance of SRE beliefs to persistence when individuals are challenged. Future research should continue to examine the potential role that SRE beliefs play in whether individuals walk for AT.

The aims of this study were to; determine if it is possible for amputees to identify walking surfaces by receiving feedback through their prostheses. determine if there are any measurable changes in amputee gait characteristics when walking on different surfaces.   Methods Subjects walked on a specially built walkway with exchangeable surface materials (level, soft and tilted) with visual and audio feedback occluded. Subjects were required to identify the surface material. Kinematic data were collected simultaneously.   Results Agreement between the true surface and that identified by the subject on the amputated side was fair to good (k=0.58). A two way repeated measures ANOVA showed a significant difference in lateral knee displacement between heel contact to foot flat, with main effect for surface (p=0.010).   Conclusion Amputees have a fair to good ability to identify walking surfaces without additional information from eye sight, hearing or the sound limb.   The kinematic measures showed a significant increase in lateral knee displacement between heel contact to foot flat on the tilted surface compared to both level and soft surfaces. This was the case for both the amputated and the sound side.   The duration of heel contact to foot flat was unaffected by walking surface and first or second step. / Titel: Transtibialt amputerades varseblivning av gångunderlag – En pilotstudie   Syftet med studien var att; undersöka om det är möjligt för en amputerad att identifiera gångunderlag genom informationen de får via protesen. undersöka om det existerar några mätbara förändringar i den amputerades gångmönster på olika underlag.   Metod Försökspersonerna gick på en specialbyggd gångbana med utbytbart gångunderlag (plant, mjukt och vinklat), med visuella intryck och ljud från gångbanan isolerade. Försökspersonerna ombads identifiera gångunderlaget. Kinematiska data samlades in simultant.   Resultat Överensstämmelse mellan det verkliga underlaget och det som rapporterades av försökspersonen var godkänt till bra (k=0,58). En two way repeated measures ANOVA visade en signifikant skillnad gällande lateral knärörelse mellan hälisättning och framfotsisättning, med huvudeffekt för gångunderlag (p=0,010).   Slutsats Amputerade har en godkänt till bra förmåga att identifiera gångunderlag utan extra information från syn, hörsel eller från det friska benet.   Kinematiska data visade en signifikant ökning av lateral knärörelse mellan hälisättning och framfotsisättning på det vinklade underlaget jämfört med både det plana och det mjuka underlaget. Detta gällde för både amputerad och frisk sida.   Tiden för hälisättning till framfotsisättning var ej påverkad av gångunderlag, och inte heller av om det var första eller andra steget.

This research investigated the association of street network connectivity differences across travel modes with travel behaviour – mode choice, distance traveled and number of trips. To date research on travel behaviour relationships with urban form has not developed empirical evidence on street designs as distinct networks for walking and driving. A street network having greater connectivity and continuity for the pedestrian mode of travel vis-à-vis the vehicular network, like the Fused Grid, will likely encourage more walking. This hypothesis was investigated using a quasi-experimental approach within a rational utility behavioural framework. Local travel behaviour is theorized to be affected by desire to access goods and services (broadly termed, ‘activities’) in the community where people live. Using inferential statistics, the research tested for relationships between measured street patterns and self-reported local travel by King County, WA households. The main variables were ratios (walking : driving) of network connectivity and density, in the vicinity of travel survey households. Demographics and household characteristics, as well as other behaviourally influential urban form factors (residential density, proximity of destinations, etc.), were included in regression models, allowing control for confounding factors. Findings suggest that street networks with connectivity that provides better routing for one mode of transportation over others encourage more travel by the favored mode. The regression model demonstrated that a change from a pure small-block grid to a modified grid (i.e. Fused Grid) can result in an 11.3% increase in odds of a home-based trip being walked. The modified street pattern like a Fused Grid is also associated with a 25.9% increase, over street patterns with equivalent route directness for walking and driving, in the odds a person will meet recommended levels of physical activity. Finally, the Fused Grid’s 10% increase in relative connectivity for pedestrians is associated with a 23% decrease in local vehicle travel distance (VMT), and its improved continuity is associated with increased walking trips and distance. Conclusions: Other factors being equal, residential street networks with either more direct routing for pedestrians or more pedestrian facilities relative to vehicular network are associated with improved odds of walking and reduced odds of driving.

Objective: To describe the effect of mindfulness on perceived health, perceptions of transit walking and transit walking behaviours by using qualitative and quantitative methods in hopes of assessing the feasibility of future mindfulness interventions in transit users. Method: Fifty-three residents of Kitchener-Waterloo were recruited at transit stops and public buildings. All participants took part in a cross-sectional mixed-methods telephone survey, including qualitative questions designed by the researcher, quantitative questions from validated surveys and the Mindful Attention Awareness Scale. Both a qualitative measure and a quantitative measure of transit mindfulness were used. Four participants who scored low on transit mindfulness but walked more than 30 minutes per day took part in a qualitative interview. Results: Walking to transit was perceived to be a good way to get exercise, but participants thought that the value of this exercise depends on the distance walked. Although the majority of study participants were mindful of the value of walking to transit they did not attain enough exercise doing so. Most observed associations between mindfulness, perceptions of transit walking, transit walking behaviours and perceived health were positive but did not reach significance, likely due to issues of statistical power and small sample size. Of the tested covariates age and gender appeared to influence the observed positive associations. Conclusions: There is potential for successful mindfulness interventions with transit users who are older or female, especially when increased levels of transit walking are encouraged. Younger males could be targeted in future interventions, targeting their lack of mindfulness and adequate transit walking. Future research on mindfulness should focus on creating measures that can be used to measure mindfulness in daily life and also retain the Buddhist definition of mindfulness in-the-moment. Reliance on self-report measures should be avoided. The results of this study could be useful at the local level to design research that examines perceptions of transit and transit-related exercise as light rail is implemented to replace bus transit.

Abstract Background. Physical therapists report inconsistent use of valid and reliable measures of walking post-stroke. Objective. To describe the methods physical therapists use to evaluate walking, reasons for selecting these methods, and the use of the evaluation results in clinical practice along the continuum of an organized system of stroke care. Methods. A qualitative descriptive study involving semi-structured telephone interviews of physical therapists in Ontario was conducted. A thematic analysis was performed. Results. Participants (n=28) used both standardized and non-standardized methods to assess walking. A hierarchy of factors influencing use of both methods was observed. Assessment results were commonly used for communication with other healthcare professionals or education of the patient. Conclusions. A variety of factors influence physical therapists to use standardized assessment tools. Future knowledge translation interventions should focus on these factors to improve the standardized assessment of walking post-stroke.

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