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Eriksson, Linda
Publications (2 of 2) Show all publications
Eriksson, L., Schagatay, F., Sjöström, R., Soderstrom, L., Hanstock, H., Sandström, T. & Stenfors, N. (2018). Symptoms of moderate exercise in subzero temperatures - An experimental exposure study. Paper presented at 28th International Congress of the European-Respiratory-Society (ERS), SEP 15-19, 2018, Paris, FRANCE. European Respiratory Journal, 52
Open this publication in new window or tab >>Symptoms of moderate exercise in subzero temperatures - An experimental exposure study
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2018 (English)In: European Respiratory Journal, ISSN 0903-1936, E-ISSN 1399-3003, Vol. 52Article in journal, Meeting abstract (Other academic) Published
Abstract [en]

Humans react to cold with various symptoms. Previous studies enquiring about symptoms during cold exposure have for the most part been population based studies using questionnaries and have focused on a narrow spectrum of symptoms. The purpose of this study was to study the effect of cold air and physical exercise on a wide range of symptoms in healthy individuals.

A total of 31 healthy subjects were experimentally exposed to +10 °C and -10 °C in an environmental chamber for one hour, on two separate occasions. During each exposure, subjects performed an intermittent moderate-intensity running protocol between 62-78% of maximal oxygen consumption (VO2 max). At five timepoints, before, during and after the exposures, subjects were asked about 18 symptoms and their intensity. The Borg CR10 scale was used to rate the intensity from 0 to 11, where 0 meant "none" and 11 meant "maximal". The sum of all five Borg CR10-scores were added together to form a single score for each exposure. Paired Wilcoxon signed-rank test was used for analysis. Data are presented as medians.

Symptoms of cough, eye irritation, physical discomfort, and cold extremities were present only at -10 °C. Compared to exercise in +10 °C, exercise in -10 °C induced significantly higher summed symptom scores for eye irritation 2.0 vs 0.5 (p=0.011), rhinitis 12.0 vs 8.0 (p=0.000), nasal irritation 3.5 vs 0.5 (p=0.001), cold face 7.0 vs 1.0 (p=0.000), physical discomfort 6.5 vs 0.0 (p=0.000), and cold extremities 10.0 vs 0.5 (p=0.000).

In healthy subjects, moderate-intensity exercise in -10 °C can induce and enhance the intensity of a wide range of symptoms. Symptoms of the lower airways were infrequent and mild.

Place, publisher, year, edition, pages
European Respiratory Society, 2018
National Category
Respiratory Medicine and Allergy
Identifiers
urn:nbn:se:umu:diva-156010 (URN)10.1183/13993003.congress-2018.PA4514 (DOI)000455567106165 ()
Conference
28th International Congress of the European-Respiratory-Society (ERS), SEP 15-19, 2018, Paris, FRANCE
Note

Supplement: 62

Meeting Abstract: PA4514

Available from: 2019-02-01 Created: 2019-02-01 Last updated: 2019-02-01Bibliographically approved
Norqvist, J., Eriksson, L., Söderström, L., Lindberg, A. & Stenfors, N. (2015). Self-reported physician-diagnosed asthma among Swedish adolescent, adult and former elite endurance athletes. Journal of Asthma, 52(10)
Open this publication in new window or tab >>Self-reported physician-diagnosed asthma among Swedish adolescent, adult and former elite endurance athletes
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2015 (English)In: Journal of Asthma, ISSN 0277-0903, E-ISSN 1532-4303, Vol. 52, no 10Article in journal (Refereed) Published
Abstract [en]

OBJECTIVE: Asthma is common among elite endurance athletes. Since the first published Swedish studies in 1993, awareness of "skiers' asthma" has increased. The current prevalence of asthma among Swedish skiers is unknown. This paper aims to present the design of a 5-year prospective annual questionnaire study on asthma among Swedish current and former elite endurance athletes, the first cross-sectional results on prevalence, age of onset, and predictors of self-reported physician-diagnosed asthma in the study population.

METHODS: An annual postal questionnaire is sent to Swedish elite skiers and orienteers during 2011-2015. In 2013, former Swedish Olympic skiers were similarly invited. We present cross-sectional data obtained in 2011 from the adolescents and adults and in 2013 from former skiers. A total of 491 athletes were invited. The results are presented by age, sex and sport. Chi-square test was used for group comparisons. Predictors of asthma were identified using logistic regression.

RESULTS: Response rate was 82%. Among athletes aged 15-19, 29% of the skiers (38% of the female skiers), and 17% of the orienteers reported asthma (p = 0.071). Among the athletes aged 20-34, 35% of the skiers and 16% of the orienteers reported asthma (p = 0.029). Among the former skiers aged 40-94, 22% reported asthma. Among the active athletes, the onset of asthma was in early adolescence. Logistic regression found increasing age, female sex, allergy, family history of allergy/asthma and being skier predictors of self-reported physician-diagnosed asthma.

CONCLUSIONS: The prevalence of physician-diagnosed asthma is high among Swedish endurance athletes, especially female adolescent skiers.

Place, publisher, year, edition, pages
Taylor & Francis, 2015
Keywords
Airway symptoms, epidemiology, medication, orienteers, risk factors, skiers
National Category
Respiratory Medicine and Allergy
Identifiers
urn:nbn:se:umu:diva-112530 (URN)10.3109/02770903.2015.1038389 (DOI)000366245800010 ()26288032 (PubMedID)
Available from: 2015-12-09 Created: 2015-12-09 Last updated: 2018-06-07Bibliographically approved
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