The purpose of this study was to translate and investigate the validity and reliability of the modified Baecke Physical Activity Questionnaire (mBQ) in the Greek adult population.
This is a cross-cultural study.
The cross-cultural adaptation of the mBQ was performed according to official guidelines. The prefinal Greek translation was tested in 30 healthy participants. The reliability was determined (n = 100) by filling out the mBQ, two times, 1 week apart. For validation (n = 45), the scores between the mBQ and the International Physical Activity Questionnaire (IPAQ) were compared, and the correlation between mBQ and VOmax and between mBQ and interview (METS) were assessed.
High statistical significant of test-retest reliability was found (intraclass correlation coefficient = 0.84; standard error of measurement = 0.48; smallest detectable difference = 16.7%; Cronbach’s alpha = 0.92). Statistical significant correlation between the mBQ and the IPAQ (r = 0.425, P = 0.005), high correlation between the mBQ and METS (r = 0.691, P = 0.000), and moderate correlation between mBQ and VOmax (r = 0.388, P = 0.08) were found.
The Greek mBQ was found to be reliable and valid for assessing the level of physical activity in the Greek population. CLINICALTRIALS.

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