Upper respiratory tract infection is reduced in physically fit and active adults.

TitleUpper respiratory tract infection is reduced in physically fit and active adults.
Publication TypeJournal Article
Year of Publication2011
AuthorsNieman DC, Henson DA, Austin MD, Sha W
JournalBr J Sports Med
Volume45
Issue12
Pagination987-92
Date Published2011 Sep
ISSN1473-0480
KeywordsAdolescent, Adult, Aged, Aged, 80 and over, Exercise, Female, Humans, Male, Middle Aged, Physical Fitness, Respiratory Tract Infections, Seasons, Time Factors, Young Adult
Abstract

<p><b>OBJECTIVE: </b>Limited data imply an inverse relationship between physical activity or fitness level and the rates of upper respiratory tract infection (URTI). The purpose of this study was to monitor URTI symptoms and severity in a heterogeneous group of community adults and contrast across tertiles of physical activity and fitness levels while adjusting for potential confounders.</p><p><b>DESIGN: </b>A group of 1002 adults (ages 18-85 years, 60% female, 40% male) were followed for 12 weeks during the winter and fall seasons while monitoring URTI symptoms and severity using the Wisconsin Upper Respiratory Symptom Survey. Subjects reported frequency of aerobic activity, and rated their physical fitness level using a 10-point Likert scale. A general linear model, with adjustment for seven confounders, was used to examine the effect of exercise frequency and fitness level on the number of days with URTI and severity of symptoms.</p><p><b>RESULTS: </b>The number of days with URTI during the 12-week period was significantly reduced, 43% in subjects reporting ≥ 5 days/week aerobic exercise compared to those who were largely sedentary (≤ 1 day/week) and 46% when comparing subjects in the high versus low fitness tertile. URTI severity and symptomatology were also reduced 32% to 41% between high and low aerobic activity and physical fitness tertiles.</p><p><b>CONCLUSIONS: </b>Perceived physical fitness and frequency of aerobic exercise are important correlates of reduced days with URTI and severity of symptoms during the winter and fall common cold seasons.</p>

DOI10.1136/bjsm.2010.077875
Alternate JournalBr J Sports Med
PubMed ID21041243