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Influence of high-intensity interval training in adolescents with asthma / Charles O.N. Winn

DOI (Published version): 10.23889/Suthesis.46062

Abstract

Low levels of fitness are associated with increased body mass index (BMI), both of which are related to quality of life (QoL) and the occurrence and severity of asthma. Therefore, the purpose of this thesis was to co-develop and implement a six-month high-intensity interval training (HIIT) intervent...

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Published: 2018
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa46062
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first_indexed 2018-11-23T20:19:41Z
last_indexed 2019-10-21T16:52:19Z
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spelling 2018-11-26T09:19:53.3707288 v2 46062 2018-11-23 Influence of high-intensity interval training in adolescents with asthma 2018-11-23 Low levels of fitness are associated with increased body mass index (BMI), both of which are related to quality of life (QoL) and the occurrence and severity of asthma. Therefore, the purpose of this thesis was to co-develop and implement a six-month high-intensity interval training (HIIT) intervention targeting aerobic fitness, BMI and QoL improvements in adolescents with asthma.Six-hundred and sixteen adolescents (13.0±1.1years; 155 asthma; 85% mild asthma as defined by medication-step) participated in the study, with 223 enrolled in the school based HIIT intervention (50 asthma), consisting of 10-30second bouts at >90%age-predicted maximum heart-rate with equal rest, 3x30minutes/week. Formative group interviews to elicit the views of adolescents with and without asthma on asthma and exercise were used to inform the design of the intervention. Anthropometrics, aerobic fitness, lung function and QoL were measured at baseline, mid-point and post-intervention to evaluate the intervention’s impact; follow-up measures were also taken to evaluate sustainability.Focus groups revealed participants with asthma had a fear of asthma attack through exercise, although fear did not act as a barrier, and that the intervention should be varied to circumvent activity-specific anxieties. Participants with asthma were found to have higher BMI and lower physical activity in comparison to their peers, but no difference in cardiorespiratory fitness. The intervention elicited significant improvements in peak cardiorespiratory fitness, irrespective of asthma, while maintaining BMI which increased in the controls; no changes were observed in the sub-maximal exercise parameters, QoL or lung function.The present findings suggest that HIIT may be effective at increasing peak cardiorespiratory fitness and preventing increases in BMI in adolescents, irrespective of asthma status. Overall, the series of studies show that asthma does not deleteriously influence maximal and sub-maximal aerobic fitness, or trainability in adolescents, and that HIIT is a safe exercise modality for adolescents with asthma. E-Thesis 31 12 2018 2018-12-31 10.23889/Suthesis.46062 COLLEGE NANME COLLEGE CODE Swansea University Doctoral Ph.D Asthma UK Centre for Applied Research AUK-AC-2012-01 2018-11-26T09:19:53.3707288 2018-11-23T15:17:55.5060168 Faculty of Medicine, Health and Life Sciences Swansea University Medical School - Medicine Charles O.N. Winn 1 0046062-23112018155514.pdf Winn_Charles_O_N_Final_PhD_Thesis_Redacted.pdf 2018-11-23T15:55:14.6800000 Output 12182341 application/pdf E-Thesis – open access true 2018-11-23T00:00:00.0000000 true
title Influence of high-intensity interval training in adolescents with asthma
spellingShingle Influence of high-intensity interval training in adolescents with asthma
,
title_short Influence of high-intensity interval training in adolescents with asthma
title_full Influence of high-intensity interval training in adolescents with asthma
title_fullStr Influence of high-intensity interval training in adolescents with asthma
title_full_unstemmed Influence of high-intensity interval training in adolescents with asthma
title_sort Influence of high-intensity interval training in adolescents with asthma
author ,
author2 Charles O.N. Winn
format E-Thesis
publishDate 2018
institution Swansea University
doi_str_mv 10.23889/Suthesis.46062
college_str Faculty of Medicine, Health and Life Sciences
hierarchytype
hierarchy_top_id facultyofmedicinehealthandlifesciences
hierarchy_top_title Faculty of Medicine, Health and Life Sciences
hierarchy_parent_id facultyofmedicinehealthandlifesciences
hierarchy_parent_title Faculty of Medicine, Health and Life Sciences
department_str Swansea University Medical School - Medicine{{{_:::_}}}Faculty of Medicine, Health and Life Sciences{{{_:::_}}}Swansea University Medical School - Medicine
document_store_str 1
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description Low levels of fitness are associated with increased body mass index (BMI), both of which are related to quality of life (QoL) and the occurrence and severity of asthma. Therefore, the purpose of this thesis was to co-develop and implement a six-month high-intensity interval training (HIIT) intervention targeting aerobic fitness, BMI and QoL improvements in adolescents with asthma.Six-hundred and sixteen adolescents (13.0±1.1years; 155 asthma; 85% mild asthma as defined by medication-step) participated in the study, with 223 enrolled in the school based HIIT intervention (50 asthma), consisting of 10-30second bouts at >90%age-predicted maximum heart-rate with equal rest, 3x30minutes/week. Formative group interviews to elicit the views of adolescents with and without asthma on asthma and exercise were used to inform the design of the intervention. Anthropometrics, aerobic fitness, lung function and QoL were measured at baseline, mid-point and post-intervention to evaluate the intervention’s impact; follow-up measures were also taken to evaluate sustainability.Focus groups revealed participants with asthma had a fear of asthma attack through exercise, although fear did not act as a barrier, and that the intervention should be varied to circumvent activity-specific anxieties. Participants with asthma were found to have higher BMI and lower physical activity in comparison to their peers, but no difference in cardiorespiratory fitness. The intervention elicited significant improvements in peak cardiorespiratory fitness, irrespective of asthma, while maintaining BMI which increased in the controls; no changes were observed in the sub-maximal exercise parameters, QoL or lung function.The present findings suggest that HIIT may be effective at increasing peak cardiorespiratory fitness and preventing increases in BMI in adolescents, irrespective of asthma status. Overall, the series of studies show that asthma does not deleteriously influence maximal and sub-maximal aerobic fitness, or trainability in adolescents, and that HIIT is a safe exercise modality for adolescents with asthma.
published_date 2018-12-31T03:57:46Z
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score 11.013731

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