{"title":"非残疾成年人的滚动阻力、首选速度和手动轮椅推进力学之间的关系。","authors":"Hunter Soleymani, Rachel Cowan","doi":"10.1080/17483107.2023.2239297","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>To characterize the relationship among rolling resistance (RR), preferred speed, and propulsion mechanics.</p><p><strong>Methods: </strong><i>N</i> = 11 non-disabled individuals (mean (SD)); Age 24 years (2), BMI 23.8 kg/m<sup>2</sup> (4.3) completed a submaximal graded wheelchair exercise test (GXT<sub>submax</sub>, fixed speed, terminated at Rating of Perceived Effort (RPE)=8 (0-10 scale)) and a single-blind, within-subject repeated measures wheelchair propulsion experiment (RME). RR at RPE = 10 (estimated maximum workload, Max<sub>estimated</sub>) was estimated from the GXT<sub>submax</sub> RPE-RR relationship. RME consisted of <i>N</i> = 19 1-minute trials (self-selected speed) each followed by 2-minutes rest. The trials included <i>N</i> = 16 unique RR between 25-100% of Max<sub>estimated</sub>. Averages of all pushes in <i>N</i> = 16 unique 1-minute trials were computed for average RR (N), speed (m/s), peak force (F<sub>peak</sub> (N)), force rate of rise (F<sub>ror</sub> (N/s)), push frequency (PF (pushes/min)), and push length (PL (deg)).</p><p><strong>Results: </strong>Repeated measures correlation assessed relationships among outcome variables (<i>α</i> = 0.05). RR was associated with decreased speed (<i>r</i>=-0.81, <i>p</i> < 0.001), increased F<sub>peak</sub> (<i>r</i> = 0.92), F<sub>ror</sub> (<i>r</i> = 0.26), and PL (<i>r</i> = 0.32) (all <i>p</i> > 0.001), and unrelated to PF (<i>r</i> = 0.02, <i>p</i> = 0.848). Increased speed was associated with increased F<sub>ror</sub> (<i>r</i> = 0.23, <i>p</i> = 0.003) and PF (<i>r</i> = 0.27, <i>p</i> < 0.001) and decreased F<sub>peak</sub> (<i>r</i>=-0.66, <i>p</i> < 0.001) and PL (<i>r</i>=-0.25, <i>p</i> < 0.001).</p><p><strong>Conclusion: </strong>Increasing RR increases F<sub>peak</sub> despite reducing self-selected speed. RR and speed were strongly and moderately related to F<sub>peak,</sub> respectively, but weakly related to other propulsion mechanics. These results suggest that reducing user-system RR may confer dual benefits of improved mobility and decreased upper extremity loading. Further testing among wheelchair users is required. Clinical trial registration number: NCT04987177.</p>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Relationship between rolling resistance, preferred speed, and manual wheelchair propulsion mechanics in non-disabled adults.\",\"authors\":\"Hunter Soleymani, Rachel Cowan\",\"doi\":\"10.1080/17483107.2023.2239297\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><strong>Purpose: </strong>To characterize the relationship among rolling resistance (RR), preferred speed, and propulsion mechanics.</p><p><strong>Methods: </strong><i>N</i> = 11 non-disabled individuals (mean (SD)); Age 24 years (2), BMI 23.8 kg/m<sup>2</sup> (4.3) completed a submaximal graded wheelchair exercise test (GXT<sub>submax</sub>, fixed speed, terminated at Rating of Perceived Effort (RPE)=8 (0-10 scale)) and a single-blind, within-subject repeated measures wheelchair propulsion experiment (RME). RR at RPE = 10 (estimated maximum workload, Max<sub>estimated</sub>) was estimated from the GXT<sub>submax</sub> RPE-RR relationship. RME consisted of <i>N</i> = 19 1-minute trials (self-selected speed) each followed by 2-minutes rest. The trials included <i>N</i> = 16 unique RR between 25-100% of Max<sub>estimated</sub>. Averages of all pushes in <i>N</i> = 16 unique 1-minute trials were computed for average RR (N), speed (m/s), peak force (F<sub>peak</sub> (N)), force rate of rise (F<sub>ror</sub> (N/s)), push frequency (PF (pushes/min)), and push length (PL (deg)).</p><p><strong>Results: </strong>Repeated measures correlation assessed relationships among outcome variables (<i>α</i> = 0.05). RR was associated with decreased speed (<i>r</i>=-0.81, <i>p</i> < 0.001), increased F<sub>peak</sub> (<i>r</i> = 0.92), F<sub>ror</sub> (<i>r</i> = 0.26), and PL (<i>r</i> = 0.32) (all <i>p</i> > 0.001), and unrelated to PF (<i>r</i> = 0.02, <i>p</i> = 0.848). Increased speed was associated with increased F<sub>ror</sub> (<i>r</i> = 0.23, <i>p</i> = 0.003) and PF (<i>r</i> = 0.27, <i>p</i> < 0.001) and decreased F<sub>peak</sub> (<i>r</i>=-0.66, <i>p</i> < 0.001) and PL (<i>r</i>=-0.25, <i>p</i> < 0.001).</p><p><strong>Conclusion: </strong>Increasing RR increases F<sub>peak</sub> despite reducing self-selected speed. RR and speed were strongly and moderately related to F<sub>peak,</sub> respectively, but weakly related to other propulsion mechanics. These results suggest that reducing user-system RR may confer dual benefits of improved mobility and decreased upper extremity loading. Further testing among wheelchair users is required. Clinical trial registration number: NCT04987177.</p>\",\"PeriodicalId\":1,\"journal\":{\"name\":\"Accounts of Chemical Research\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":16.4000,\"publicationDate\":\"2024-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Accounts of Chemical Research\",\"FirstCategoryId\":\"3\",\"ListUrlMain\":\"https://doi.org/10.1080/17483107.2023.2239297\",\"RegionNum\":1,\"RegionCategory\":\"化学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2023/7/26 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1080/17483107.2023.2239297","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2023/7/26 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Relationship between rolling resistance, preferred speed, and manual wheelchair propulsion mechanics in non-disabled adults.
Purpose: To characterize the relationship among rolling resistance (RR), preferred speed, and propulsion mechanics.
Methods: N = 11 non-disabled individuals (mean (SD)); Age 24 years (2), BMI 23.8 kg/m2 (4.3) completed a submaximal graded wheelchair exercise test (GXTsubmax, fixed speed, terminated at Rating of Perceived Effort (RPE)=8 (0-10 scale)) and a single-blind, within-subject repeated measures wheelchair propulsion experiment (RME). RR at RPE = 10 (estimated maximum workload, Maxestimated) was estimated from the GXTsubmax RPE-RR relationship. RME consisted of N = 19 1-minute trials (self-selected speed) each followed by 2-minutes rest. The trials included N = 16 unique RR between 25-100% of Maxestimated. Averages of all pushes in N = 16 unique 1-minute trials were computed for average RR (N), speed (m/s), peak force (Fpeak (N)), force rate of rise (Fror (N/s)), push frequency (PF (pushes/min)), and push length (PL (deg)).
Results: Repeated measures correlation assessed relationships among outcome variables (α = 0.05). RR was associated with decreased speed (r=-0.81, p < 0.001), increased Fpeak (r = 0.92), Fror (r = 0.26), and PL (r = 0.32) (all p > 0.001), and unrelated to PF (r = 0.02, p = 0.848). Increased speed was associated with increased Fror (r = 0.23, p = 0.003) and PF (r = 0.27, p < 0.001) and decreased Fpeak (r=-0.66, p < 0.001) and PL (r=-0.25, p < 0.001).
Conclusion: Increasing RR increases Fpeak despite reducing self-selected speed. RR and speed were strongly and moderately related to Fpeak, respectively, but weakly related to other propulsion mechanics. These results suggest that reducing user-system RR may confer dual benefits of improved mobility and decreased upper extremity loading. Further testing among wheelchair users is required. Clinical trial registration number: NCT04987177.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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