Summary .— This study provided validity evidence for the Godin-Shephard Leisure-Time Physical Activity Questionnaire (GSLTPAQ) to classify respondents into active and insuffi ciently active categories. Members of a fi tness center [45 women and 55 men; mean ( SD ) age = 45.5 (10.6) yr.] completed the questionnaire. Using only moderate and strenuous scores, those with a leisure score index ≥…