Short description
(German)
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Körperliche Aktivität ist ein neuerkannter, hochrelevanter positiver Einflussfaktor auf die Gesundheit. Die auch in der Schweiz verbreitete körperliche Inaktivität verursacht deshalb Krankheiten und entsprechende Kosten in ungeahnter Höhe. Mehr und mehr wird es deshalb als eine Aufgabe der öffentlichen Hand angesehen, Bewegung und Sport in allen Formen bevölkerungsweit zu fördern. Um das Aktivitätsniveau und dessen Aenderungen über die Zeit zu verfolgen, ist man auf (Kurz-)Fragebogen angewiesen, die von den erfassten Personen selber ausgefüllt werden.
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Abstract
(German)
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VALIDATION STUDY OF SHORT PHYSICAL ACTIVITY QUESTIONNAIRES, BASED ON ACCELEROMETRY
Mäder, U., Martin B., 1Schutz, Y., Marti, B.
Institute of Sport Sciences, Federal Office of Sports, Magglingen and 1Institute of Physiology, University of Lausanne, Switzerland
Introduction: Self-report instruments continue to be the most widely used type of physical activity measure in epidemiological studies. However, the validity of physical activity questionnaires has to be determined. In addition to questionnaires already used in Switzerland, the "International Physical Activity Questionnaire" (IPAQ) was validated against accelerometry.
Method: After answering the questionnaires, volunteers were carefully instructed how to use the accelerometer (CSA) during the following 7 days. They were classified by the questionnaires into three groups: inactive (less than 30 minutes daily moderate intensity activity), active (at least 30 minutes daily moderate intensity activity), and trained (at least 3 * 20 minutes per week exercise with sweating). In addition, total physical activity determined by IPAQ was compared to accelerometer data (counts/minute).
Results: The accelerometer data of 35 volunteers (13 f, 22 m, 53.9 ±14.6 y) were compared with categorical data derived from the "HEPA Survey 1999" items. Volunteers classified as inactive (n=11) compiled 344 ± 69 counts per minute. Active volunteers (n=8) raised 369 ±111 counts/min. Trained volunteers (n=16) reached 409 ± 136 counts/min. Categories constructed using the "Feel Your Power 2001"- questionnaire compiled 309 ± 42 (n=5), 388 ± 142 (n=12), and 397 ± 108 counts/min (n=12), respectively. The categories built by the IPAQ reached 330 ± 69 (n=8), 403 ± 127 (n=15), and 384 ± 115 counts/min (n=12), respectively. Differences were clearest comparing the inactive with the other individuals, though they did not reach statistical significance (P=0.217; p=0.094; p=0.135). Total physical activity determined by IPAQ correlated with the measured counts/minute (r=0.36, p< 0.05).
Discussion: While trend could be observed in the categorical data, total physical activity of the IPAQ was significantly related to the accelerometer data. More results will follow.
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