Format

Send to

Choose Destination
Br J Sports Med. 2016 Jul;50(13):809-15. doi: 10.1136/bjsports-2015-095398. Epub 2016 Mar 3.

Training-related and competition-related risk factors for respiratory tract and gastrointestinal infections in elite cross-country skiers.

Author information

1
School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough, UK.
2
Department of Training, Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway.
3
Department of Training, Norwegian Olympic and Paralympic Committee and Confederation of Sports, Oslo, Norway Department of Sports Medicine, Oslo Sports Trauma Research Center, Norwegian School of Sport Sciences, Oslo, Norway.

Abstract

AIM:

To examine symptoms indicative of respiratory tract and gastrointestinal infections and determine risk factors for such symptoms in elite cross-country skiers.

METHODS:

Self-reported training and symptom data for 37 elite cross-country skiers from 2007 to 2015 were analysed using multilevel logistic regression equations with symptom incidence and duration as outcome variables, and sex, performance level, season, competition, air travel, altitude exposure and training characteristics as independent variables.

RESULTS:

Data for 7016 person-weeks were analysed, including 464 self-reported infection events and 110 959 h of training. Athletes reported median (range) 3 (1-7) respiratory tract and/or gastrointestinal events per year, with symptoms lasting 5 (1-24) days. During the winter, symptoms occurred more frequently (OR 2.09, p<0.001) and lasted longer (b=0.043, p<0.001) compared with summer. Competition and air travel increased the risk of symptoms, with ORs of 2.93 (95% CI 2.24 to 3.83) and 4.94 (95% CI 3.74 to 6.53), respectively (p<0.001). Athletes with higher training monotony had lower risk of symptoms (OR 0.87 (95% CI 0.73 to 0.99), p<0.05). Other training variables were not associated with symptoms. Athletes who had won an Olympic/World Championship medal reported shorter symptom duration compared with less successful athletes (b=-0.019, p<0.05) resulting in significantly fewer symptomatic days/year (14 (6-29) vs 22 (8-43) days/year).

CONCLUSIONS:

Air travel and competition are major risk factors for acute respiratory tract and gastrointestinal symptoms in this population. Athletes who have large fluctuations in training load experience such symptoms more frequently. Shorter duration of symptoms appears to be associated with success in cross-country skiing.

KEYWORDS:

Altitude; Athlete; Infection; Risk factor; Travel

PMID:
26941278
DOI:
10.1136/bjsports-2015-095398
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for HighWire
Loading ...
Support Center