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The effect of physical activity on asthma incidence over 10 years: population-based study

Melissa Anne Russell, Shyamali Dharmage, Elaine Fuertes, Alessandro Marcon, Anne-Elie Carsin, Silvia Pascual Erquicia, Joachim Heinrich, Ane Johannessen, Michael J. Abramson, Andre F.S. Amaral, Isa Cerveri, Pascal Demoly, Vanessa Garcia-Larsen, Deborah Jarvis, Jesus Martinez-Moratalla, Dennis Nowak, Leopoldo Palacios-Gomez, Giulia Squillacioti, Wasif Raza, Margareta Emtner, Judith Garcia-Aymerich
ERJ Open Research 2021 7: 00970-2020; DOI: 10.1183/23120541.00970-2020
Melissa Anne Russell
1Allergy and Lung Health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
2Gastro and Food Allergy Group, Murdoch Children's Research Institute, Melbourne, Australia
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Shyamali Dharmage
1Allergy and Lung Health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
2Gastro and Food Allergy Group, Murdoch Children's Research Institute, Melbourne, Australia
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Elaine Fuertes
3National Heart and Lung Institute, Imperial College London, London, UK
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Alessandro Marcon
4Unit of Epidemiology and Medical Statistics, Department of Diagnostics and Public Health, University of Verona, Verona, Italy
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Anne-Elie Carsin
5Barcelona Institute of Global Health (ISGlobal), Barcelona, Spain
6IMIM-Hospital del Mar, Barcelona, Spain
7CIBER Epidemiologia y Salud Publica, Barcelona, Spain
8Universitat Pompeu Fabra (UPF), Barcelona, Spain
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Silvia Pascual Erquicia
9Respiratory Department, Galdakao Hospital, OSI Barrualde-Galdakao, Biscay, Spain
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Joachim Heinrich
1Allergy and Lung Health Unit, Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Australia
10Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Comprehensive Pneumology Center (CPC) Munich, Member DZL, German Center for Lung Research, Munich, Germany
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Ane Johannessen
11Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen (NO), Bergen, Norway
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Michael J. Abramson
12School of Public Health & Preventive Medicine, Monash University, Melbourne, Australia
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Andre F.S. Amaral
3National Heart and Lung Institute, Imperial College London, London, UK
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Isa Cerveri
13Division of Respiratory Diseases, IRCCS Policlinico San Matteo, University of Pavia, Pavia, Italy
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Pascal Demoly
14Département de Pneumologie et addictologie, Hôpital Arnaud de Villeneuve, University Hospital of Montpellier, Montpellier, France
15INSERM UMR-S 1136, IPLESP, Sorbonne Université, Paris, France
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Vanessa Garcia-Larsen
16Dept of International Health, The Johns Hopkins Bloomberg School of Public Health, Baltimore, USA
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Deborah Jarvis
3National Heart and Lung Institute, Imperial College London, London, UK
17MRC-PHE Centre for Environment and Health, Imperial College London, London, UK
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Jesus Martinez-Moratalla
18Servicio de Neumología del Complejo Hospitalario Universitario de Albacete, Albacete, Spain
19Facultad de Medicina de Albacete, Universidad de Castilla – La Mancha, Albacete, Spain
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Dennis Nowak
10Institute and Clinic for Occupational, Social and Environmental Medicine, University Hospital, LMU Munich, Comprehensive Pneumology Center (CPC) Munich, Member DZL, German Center for Lung Research, Munich, Germany
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Leopoldo Palacios-Gomez
20El Torrejón Health Centre, Andalusian Health Service, Huelva, Spain
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Giulia Squillacioti
21Dept of Public Health and Pediatrics, University of Turin, Turin, Italy
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Wasif Raza
22Dept of Public Health and Clinical Medicine, Section of Sustainable Health, Umeå University, Umea, Sweden
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Margareta Emtner
23Dept of Medical Sciences: Respiratory, Allergy and Sleep Research, Uppsala University, Uppsala, Sweden
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Judith Garcia-Aymerich
5Barcelona Institute of Global Health (ISGlobal), Barcelona, Spain
7CIBER Epidemiologia y Salud Publica, Barcelona, Spain
8Universitat Pompeu Fabra (UPF), Barcelona, Spain
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Abstract

Although there are many health benefits from being active, there was no benefit observed in this study from vigorous physical activity in reducing the risk of asthma onset in middle-aged adults https://bit.ly/3bEtHDn

To the Editor:

Asthma remains a common disease around the world, with global estimates indicating that 4.3% of adults have doctor-diagnosed asthma [1]. Physical activity has been found to improve asthma outcomes in adults with asthma [2, 3]. While it has been hypothesised that physical activity could also reduce asthma incidence through a variety of mechanisms, studies to date have provided mixed results. Some studies find that physical activity reduces the incidence of asthma [4, 5], yet others find no evidence for a reduction in risk [6, 7]. These inconsistent findings could be partly attributed to variation in the definition of incident asthma, which is mostly restricted to self-reported asthma outcomes. In this analysis, we investigated the association between (frequency and duration of) vigorous physical activity and asthma incidence over 10 years, using the European Community Respiratory Health Survey (ECRHS), considering multiple asthma-related outcomes in an initially asthma-free population.

ECRHS is a multicentre cohort involving 46 centres in 25 countries in Europe and Australia [8]. From a random sample in ECRHS I, participants (originally 20–44 years of age) completed questionnaires and a battery of tests twice more at 10-year intervals. The present analysis uses data from ECRHS II (42 to 57 years of age) and ECHRS III (54 to 68 years of age), as physical activity data were not collected in ECRHS I. ECRHS II involved 10 217 participants. Of these, we excluded participants who reported: 1) “ever asthma” in ECRHS I or II (n=1895); 2) wheeze in the previous 12 months at ECRHS I or II (n=2328); or 3) an asthma attack prior to ECRHS I or ECHRS II (n=70). Additionally, 2421 participants were lost to follow-up, leaving 3503 participants for analysis. Ethics approval was gained by each centre.

The ECRHS II and ECRHS III questionnaires included items regarding vigorous physical activity during leisure time, in addition to questions regarding the diagnosis of respiratory diseases, respiratory symptoms, medications taken, occupation, smoking and other socio-demographic factors. The responses from the questions “How often do you usually exercise so much that you get out of breath or sweat?” and “How many hours a week do you usually exercise so much that you get out of breath or sweat?” were categorised by frequency (once a month or less, 1–3 times per week, ≥4 times per week) and duration (0 to 30 min, 1 to 3 h, ≥4 h per week), respectively. Participants reporting at least 1 h of vigorous activity across two to three incidences per week were classified as “vigorously active”, and participants reporting less for either question were classified as “not vigorously active” [9]. This classification was applied across ECRHS II and ECRHS III data and used to create the categories of “consistently vigorously active”, “becoming vigorously inactive”, “becoming vigorously active” and “consistently not vigorously active” as a “change in vigorous activity status” variable.

Asthma incidence was assessed using several outcomes at ECRHS III. Firstly, current asthma was deemed present if participants responded positively to the question “Have you had wheezing or whistling in your chest at any time in the last 12 months” and/or “Are you currently taking any medicines including inhalers, aerosols or tablets for asthma” [10]. Secondly, asthma-like symptoms were deemed present with more than three positive responses to questions regarding 12-month symptoms of: 1) wheeze, 2) wheeze with breathlessness, 3) wheeze without a cold, 4) nocturnal chest tightness, 5) nocturnal shortness of breath, 6) nocturnal attack of coughing, 7) asthma attack and 8) current asthma medications [11]. Bronchodilator reversibility was deemed present when there was an increase or decrease in forced expiratory volume in 1 s (FEV1) of 12% and >200 mL from baseline [12]. This change is accepted as being consistent with asthma in those with respiratory symptoms [12].

We also utilised ECRHS I data on sex, age and age at completion of education (<17, 17–20, ≥21 years) and ECRHS II data on occupation (categorised according to the International Standard Classification of Occupations-88 code [13]) and objectively measured weight and height, from which we derived body mass index (BMI). ECRHS II smoking data were collected across multiple questions and categorised as never-smoker, ex-smoker and current-smoker.

Associations between the physical activity measurements (ECRHS II vigorous activity status, frequency and duration, change in vigorous activity status during follow-up) were examined for each asthma outcome (current asthma, asthma-like symptoms, bronchodilator reversibility) using modified Poisson regression [14]. Age, sex, age at the completion of education, BMI, smoking and occupation at ECRHS II were included as covariates, as they were identified as potential confounders a priori. Centre clustering was taken into account using robust standard errors, and interactions between physical activity and age, sex, BMI and smoking were considered.

We conducted three sensitivity analyses: 1) to account for potential residual confounding we repeated analyses with adjustment for heart disease at ECRHS III, available in a subsample (n=2195); 2) to investigate the potential attenuating effects of asthma medications, we repeated the analyses with bronchodilator reversibility as the outcome excluding those taking asthma medications at ECRHS III; and 3) to investigate heterogeneity across regions, we conducted a random-effects meta-analysis. Stata ver16 (StataCorp, College Station, TX, USA) was used.

The participants included in this analysis were similar to those eligible with regard to age, sex, physical activity and BMI. However, those included were less likely to be current smokers (21% versus 27%) and more likely to have completed their education after 21 years of age (48% versus 41%) at ECRHS II than those lost to follow-up (40% of the ECRHS II cohort).

The average age of the 3503 participants at ECRHS II was 43 years (sd 7.0), 52% were female and average BMI was 25.1 (sd 3.9) kg·m−2. The majority were never-smokers (48%) with 31% being ex-smokers and 21% current smokers. Over half (52%) completed their education by 21 years of age, and 37% were working in management/professional fields. The majority of participants were classified as not vigorously active (63%) at ECRHS II. Almost half of participants (43%) were not vigorously active at both time points. At ECRHS III, 9% of participants had current asthma, 2% reported more than three asthma-like symptoms and 2% had a positive bronchodilator response.

There was little association between the vigorous physical activity measures and asthma outcomes (table 1). No differences were observed in the sensitivity analyses, and no interactions were found with the potential effect modifiers investigated (results not shown).

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TABLE 1

Association between European Community Respiratory Health Survey (ECRHS) II vigorous activity status, frequency and duration, change in vigorous activity status and ECRHS III current asthma, asthma-like symptoms, and bronchodilator reversibility in middle-aged adults

In this population of initially asthma-free middle-aged adults, we found little association between vigorous physical activity and the onset of asthma measures over a 10-year period. These results are consistent with some previous research investigating the effect of physical activity on asthma incidence [6, 7]. Of the two studies that found a beneficial effect of physical activity on asthma incidence, one appeared not to adjust for relevant confounders, such as age and smoking [4], and the other study used lighter physical activity as the exposure [5]. The lack of observable beneficial associations from physical activity in our study may be because of insufficient statistical power, that only less vigorous physical activity protects against asthma incidence, or that there is no benefit from physical activity in regard to asthma incidence.

The strengths of this study were the long-term follow-up, reduction in asthma misclassification by combining self-report with objective measurements and inclusion of several sensitivity analyses to minimise other potential biases. Study weaknesses include loss to follow-up and the utilisation of self-reported (instead of objective) physical activity measures; self-report of physical activity can impact validity due to an individual's propensity to overestimate physical activity levels. Additionally, bronchodilator reversibility, although a measure of asthma, can also be present with other respiratory diseases [15]. In conclusion, although multiple health benefits from physical activity are known, we did not find evidence that participating in vigorous physical activity during leisure time reduced the risk of asthma developing in adults.

Footnotes

  • Data availability: Data not available. The authors do not have permission to share data.

  • Conflict of interest: M.A. Russell has nothing to disclose.

  • Conflict of interest: S. Dharmage has nothing to disclose.

  • Conflict of interest: E. Fuertes has nothing to disclose.

  • Conflict of interest: A. Marcon has nothing to disclose.

  • Conflict of interest: A-E. Carsin has nothing to disclose.

  • Conflict of interest: S. Pascual Erquicia has nothing to disclose.

  • Conflict of interest: J. Heinrich has nothing to disclose.

  • Conflict of interest: A. Johannessen has nothing to disclose.

  • Conflict of interest: M.J. Abramson has nothing to disclose.

  • Conflict of interest: A.F.S. Amaral has nothing to disclose.

  • Conflict of interest: I. Cerveri has nothing to disclose.

  • Conflict of interest: P. Demoly reports board fees from Chiesi, IQVIA, Ménarini and Sanofi; board and speaker bureau fees from AstraZeneca, Bausch & Lomb and ThermoFisher Scientific; and speaker fees from Mylan and Novartis, all outside the submitted work.

  • Conflict of interest: V. Garcia-Larsen has nothing to disclose.

  • Conflict of interest: D. Jarvis has nothing to disclose.

  • Conflict of interest: J. Martinez-Moratalla has nothing to disclose.

  • Conflict of interest: D. Nowak has nothing to disclose.

  • Conflict of interest: L. Palacios-Gómez has nothing to disclose.

  • Conflict of interest: G. Squillacioti has nothing to disclose.

  • Conflict of interest: W. Raza has nothing to disclose.

  • Conflict of interest: M. Emtner has nothing to disclose.

  • Conflict of interest: J. Garcia-Aymerich has nothing to disclose.

  • Support statement: This study was supported by Fondazione Cassa di Risparmio di Verona Vicenza Belluno e Ancona; Comissió Interdepartamental de Recerca i Innovació Tecnològica grant 1997 SGR 00079; Deutsche Forschungsgemeinschaft grants HE 3294/10-1, MA 711/6-1 and NO 262/7-1; National Health and Medical Research Council grant 92091; the Belgian Federal Science Policy Office; Estonian Science Foundation grant 1088; the Asthma Foundation of Victoria; Bundesministerium für Forschung und Technologie; The Swiss The Federal Office of Public Health; Allen and Hanbury's; Wellcome Trust grant 084703MA; Helse Vest grant 911631; Ministre delegué de la santé; CNMATS; CNMRT grants 90MR/10 and 91AF/6; Háskóli Íslands; the canton Lung Leagues of Basel Stadt/Basel, Landschaft, Geneva, Ticino, Valais and Zurich; INSERM Université Bordeaux segalen grant U897; Comite Scientifique AGIRadom 2011; Ministère de la Santé Programme Hospitalier de Recherche Clinique (PHRC) national 2010; RNSP, France; Agence Nationale de la Santé, Région Ile de France, domaine d'intérêt majeur (DIM); the Bergen Medical Research Foundation; Medical Research Council grant 92091; a Vasterbotten County Council ALF grant; Dirección Regional de Salud Pública (Consejería de Sanidad del Principado de Asturias); Lungenliga Schweiz; Contrat de Plan Etat-Région Languedoc-Rousillon; Insitut Pneumologique d'Aquitaine; the Swiss Federal Institute for Forest, Snow and Landscape Research; the canton governments of Aargan, Basel-Stadt, Basel-Land, Geneva, Luzern, Ticino, Valais and Zürich; Glaxo France; The Swiss Federal Office of Roads and Transport; Ministère de la Santé; Astma- och Allergiförbundet; the British Lung Foundation; the UK National Asthma Campaign; Hjärt-Lungfonden; the UK Department of Health; The Landspitali University Hospital Research Fund; Hospital General Juan Ramón Jiménez; Medicinska Forskningsrådet; Fondo de Investigación Sanitaria grants 09/01511, 91/0016-060-05/E, 92/0319, 93/0393, PS09/00716, PS09/02185 and PS09/02457; Hospital General de Albacete; Italian Ministry of Health, Chiesi Farmaceutici SpA; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung grants 3100-059302, 3200-042532, 3200-052720, 3247-065896, 3247BO-104283, 3247BO-104284, 3247BO-104288, 33CSCO-108796, 33CSCO-134276/1, 4026-028099 and 4026-28099; Forskningsrådet om Hälsa, Arbetsliv och Välfärd; Servicio Andaluz de Salud; Vegagerðin (The Icelandic Road Administration (ICERA)); Orkuveita Reykjavikur (Geothermal plant); Fonds Wetenschappelijk Onderzoek grant G.0.410.08.N.10; Regione del Veneto grant 381/05.93; ResMed Foundation; Sociedad Española de Neumología y Cirugía Torácica grant SEPAR 1001/2010; Forskningsrådet för Arbetsliv och Socialvetenskap; and Norges Forskningsråd grant 101422/310. Funding information for this article has been deposited with the Crossref Funder Registry.

  • Received December 22, 2020.
  • Accepted December 24, 2020.
  • Copyright ©The authors 2021
http://creativecommons.org/licenses/by-nc/4.0/

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The effect of physical activity on asthma incidence over 10 years: population-based study
Melissa Anne Russell, Shyamali Dharmage, Elaine Fuertes, Alessandro Marcon, Anne-Elie Carsin, Silvia Pascual Erquicia, Joachim Heinrich, Ane Johannessen, Michael J. Abramson, Andre F.S. Amaral, Isa Cerveri, Pascal Demoly, Vanessa Garcia-Larsen, Deborah Jarvis, Jesus Martinez-Moratalla, Dennis Nowak, Leopoldo Palacios-Gomez, Giulia Squillacioti, Wasif Raza, Margareta Emtner, Judith Garcia-Aymerich
ERJ Open Research Jan 2021, 7 (1) 00970-2020; DOI: 10.1183/23120541.00970-2020

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The effect of physical activity on asthma incidence over 10 years: population-based study
Melissa Anne Russell, Shyamali Dharmage, Elaine Fuertes, Alessandro Marcon, Anne-Elie Carsin, Silvia Pascual Erquicia, Joachim Heinrich, Ane Johannessen, Michael J. Abramson, Andre F.S. Amaral, Isa Cerveri, Pascal Demoly, Vanessa Garcia-Larsen, Deborah Jarvis, Jesus Martinez-Moratalla, Dennis Nowak, Leopoldo Palacios-Gomez, Giulia Squillacioti, Wasif Raza, Margareta Emtner, Judith Garcia-Aymerich
ERJ Open Research Jan 2021, 7 (1) 00970-2020; DOI: 10.1183/23120541.00970-2020
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