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The moral, political, and economic stature of a country lies in the strength of its people. If people have the freedom to live their lives in dignity, they can work with a sound mind and physical health. This should be the source of the strength and power of a nation. A country should boldly proclaim to a world dominated by tyrants that "all men are created equal and they are endowed by their Creator with certain unalienable rights and "among these are life, iberty, and the pursuit of happiness". The ideals of a nation should be of the freedom of ideas, speech, press, the right to assemble and the right to worship. If a country should have amessage for its people, it should be a message of human dignity. All rights reserved.Read the passage carefully and choose the best aniswer to each question out of the four alternatives. Published by Oxford University Press on behalf of the American Physical Therapy Association. This study provides the guidance that muscle power may be more important to functional exercise capacity than muscle strength or endurance in people with COPD.Įndurance Isokinetic Power Sit-To-Stand Strength.
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Understanding the individual contribution of muscle properties to functional status is important to designing interventions. Among these functional muscle properties, muscle power contributed the most to the 6MWD and 1STS number of repetitions, suggesting that muscle power is more relevant to functional exercise capacity than muscle strength or endurance in people with COPD. Multivariate models explained 60% and 39% of the variance in the 6MWD and 1STS number of repetitions, respectively, with quadriceps power determined during 5 sit-to-stand repetitions being the muscle functional property with the strongest contribution to the models.Įxcept for isometric endurance, quadriceps strength, endurance, and power were associated with functional exercise capacity in people with moderate COPD. The number of repetitions during the 1STS correlated with each functional muscle property except isometric measurements. The 6MWD correlated with each functional muscle property except the isometric quadriceps endurance. The study included 70 people with COPD (mean % predicted forced expiratory volume in 1 second = 58.9 ). Univariate and multivariate analyses were performed to determine the contribution of functional muscle properties to the 6MWD and the 1STS number of repetitions. Isometric quadriceps strength and endurance, isotonic quadriceps endurance, isokinetic quadriceps strength, and power were assessed on a computerized dynamometer while functional quadriceps power was determined during 5 sit-to-stand repetitions. Anthropometrics, Medical Research Council dyspnea scale, lung function, 6MWD, and 1STS number of repetitions were assessed. The study was a prospective, multicenter, cross-sectional study. The purpose of this study was to investigate the contribution of quadriceps muscle strength, endurance, and power to 6-Minute Walking Distance (6MWD) and 1-minute sit-to-stand test (1STS) performance in people with COPD. Various functional muscle properties affect different aspects of functional exercise capacity in people with chronic obstructive pulmonary disease (COPD).