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Physical Activity, Cardiorespiratory...

Saavedra, Joseph Michael,

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Physical Activity, Cardiorespiratory Fitness, and Respiratory Impairment in Adults /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Physical Activity, Cardiorespiratory Fitness, and Respiratory Impairment in Adults // Joseph Michael Saavedra.
Author:	Saavedra, Joseph Michael,
Description:	1 electronic resource (117 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 86-04, Section: A.
Contained By:	Dissertations Abstracts International86-04A.
Subject:	Kinesiology. -
Online resource:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31483849
ISBN:	9798384491446

Physical Activity, Cardiorespiratory Fitness, and Respiratory Impairment in Adults /
Saavedra, Joseph Michael,

Physical Activity, Cardiorespiratory Fitness, and Respiratory Impairment in Adults /Joseph Michael Saavedra. - 1 electronic resource (117 pages)

Source: Dissertations Abstracts International, Volume: 86-04, Section: A.

Respiratory impairment is a condition of abnormally low lung function that disproportionately affects older adults, increasing their risks of adverse health outcomes. Physical activity may mitigate the risk of respiratory impairment, though evidence of this comes primarily from self-reports, and the associations between objective physical activity and respiratory impairment are unclear. Cardiorespiratory fitness, a known correlate of physical activity, is inversely associated with respiratory impairment, while high body mass index is a potent risk factor. However, whether the association of cardiorespiratory fitness with respiratory impairment is independent of body mass index is currently unknown. The goals of this dissertation were to explore the independent and joint associations of objectively assessed step volume and step intensity with 1) prevalent respiratory impairment and 2) incident respiratory impairment in two different cohorts of older adults, as well as 3) to characterize the independent and joint associations of cardiorespiratory fitness and body mass index with incident respiratory impairment in a larger cohort of adults.In studies 1 and 2, the independent and joint associations between step volume, step intensity, and prevalent/incident respiratory impairment were null. However, the directionality of our findings suggests that adequately powered studies may yield more robust results. Study 3 provided strong evidence of significant inverse associations between cardiorespiratory fitness and restrictive spirometry pattern (a prevalent subtype of respiratory impairment), independent of body mass index. A novel finding of this study was that high fitness of any body mass index (including overweight/obesity) was associated with significantly lower risks of restrictive spirometry pattern, relative to those with low fitness and overweight/obesity. This dissertation draws attention to the need for continued research into the understudied relationship between stepping behavior and respiratory impairment. Step counts are inversely associated with health outcomes that correlate with respiratory impairment, meaning the novel findings of future studies will significantly reshape our understanding of lung health with aging. This dissertation also highlights a 'fat-but-fit' paradox in the context of respiratory impairment, and this previously unknown finding emphasizes the relative importance of fitness over fatness in preserving lung health. Future studies should explore how different fatness measurements (e.g., central obesity or percent body fat) moderate the relationship between fitness and respiratory impairment, thereby clarifying the overall utility of fitness as a marker of respiratory health across fatness definitions.

English

ISBN: 9798384491446Subjects--Topical Terms:

517627
Kinesiology.
Subjects--Index Terms:

Cardiorespiratory fitness

Physical Activity, Cardiorespiratory Fitness, and Respiratory Impairment in Adults /
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245 1 0 $a Physical Activity, Cardiorespiratory Fitness, and Respiratory Impairment in Adults / $c Joseph Michael Saavedra.
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500 $a Source: Dissertations Abstracts International, Volume: 86-04, Section: A.
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502 $b Ph.D. $c Iowa State University $d 2024.
520 $a Respiratory impairment is a condition of abnormally low lung function that disproportionately affects older adults, increasing their risks of adverse health outcomes. Physical activity may mitigate the risk of respiratory impairment, though evidence of this comes primarily from self-reports, and the associations between objective physical activity and respiratory impairment are unclear. Cardiorespiratory fitness, a known correlate of physical activity, is inversely associated with respiratory impairment, while high body mass index is a potent risk factor. However, whether the association of cardiorespiratory fitness with respiratory impairment is independent of body mass index is currently unknown. The goals of this dissertation were to explore the independent and joint associations of objectively assessed step volume and step intensity with 1) prevalent respiratory impairment and 2) incident respiratory impairment in two different cohorts of older adults, as well as 3) to characterize the independent and joint associations of cardiorespiratory fitness and body mass index with incident respiratory impairment in a larger cohort of adults.In studies 1 and 2, the independent and joint associations between step volume, step intensity, and prevalent/incident respiratory impairment were null. However, the directionality of our findings suggests that adequately powered studies may yield more robust results. Study 3 provided strong evidence of significant inverse associations between cardiorespiratory fitness and restrictive spirometry pattern (a prevalent subtype of respiratory impairment), independent of body mass index. A novel finding of this study was that high fitness of any body mass index (including overweight/obesity) was associated with significantly lower risks of restrictive spirometry pattern, relative to those with low fitness and overweight/obesity. This dissertation draws attention to the need for continued research into the understudied relationship between stepping behavior and respiratory impairment. Step counts are inversely associated with health outcomes that correlate with respiratory impairment, meaning the novel findings of future studies will significantly reshape our understanding of lung health with aging. This dissertation also highlights a 'fat-but-fit' paradox in the context of respiratory impairment, and this previously unknown finding emphasizes the relative importance of fitness over fatness in preserving lung health. Future studies should explore how different fatness measurements (e.g., central obesity or percent body fat) moderate the relationship between fitness and respiratory impairment, thereby clarifying the overall utility of fitness as a marker of respiratory health across fatness definitions.
546 $a English
590 $a School code: 0097
650 4 $a Kinesiology. $3 517627
650 4 $a Epidemiology. $3 568544
650 4 $a Physical education. $3 635343
653 $a Cardiorespiratory fitness
653 $a Older adults
653 $a Respiratory impairment
653 $a Step intensity
653 $a Step volume
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690 $a 0523
710 2 $a Iowa State University. $b Kinesiology. $e degree granting institution. $3 3815901
720 1 $a Lefferts, Elizabeth $e degree supervisor.
720 1 $a Lee, Duck-chul $e degree supervisor.
773 0 $t Dissertations Abstracts International $g 86-04A.
790 $a 0097
791 $a Ph.D.
792 $a 2024
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31483849