![]() Due to their low cost and ease of administration, self-report methods are the most commonly used in population monitoring of physical activity, but are prone to recall and social desirability bias. Thus, assessment of physical activity in adolescents at population level is needed to identify current levels of physical activity, provide a basis for targeted intervention, and assess the effectiveness of intervention programs designed to increase physical activity.Ī wide range of objective and subjective methods have been used to measure physical activity behavior among children and adolescents. However, the evidence suggests few adolescents meet the guideline. For youth aged 5–18 years, it is recommended that they should participate daily in 60 minutes or more of moderate to vigorous physical activity (MVPA) for health. Physical activity across the life span is an important component of a healthy lifestyle, and the benefits of being active to prevent a range of chronic diseases and obesity are well documented. V-APARQ will be useful for population monitoring of change in physical activity among urban Vietnamese adolescents. The reliability and validity of the V-APARQ were low to fair, but are comparable to other self-report physical activity questionnaires used among adolescents. In boys MVPA was lower on the first, compared with second administration of V-APARQ while the reverse was observed among girls. The Bland-Altman plots for reliability show a mean difference of 0.4 minutes (95 % CI = −3.2, 4.0) for daily MVPA (n = 146) and the limits of agreement were −42.6 to 43.4 mins/day. ![]() Test-retest reliability showed a weighted Kappa of 0.75 and the intra-class correlation coefficient for MVPA was 0.57 for the whole group (MPA =0.37 and VPA = 0.62), and were higher in boys than girls. The construct validity of the V-APARQ showed Spearman correlation of 0.25 and 0.22 for the assessment of the questionnaire when compared to the accelerometer. Construct validity was assess by 7-day accelerometry, following the completion of the first V-APARQ. Reliability was assessed by test-retest (2 weeks apart). V-APARQ asked students to report their usual organised and non-organised physical activity during a normal week and moderate- (MPA), vigorous- (VPA and moderate-to-vigorous- (MVPA) physical activity were calculated. One hundred and sixty five students were recruited from four junior high schools in Ho Chi Minh City Vietnam in 2004. This study aims to assess the reliability and validity of the Vietnamese Adolescent Physical Activity Recall Questionnaire (V-APARQ). However, these questionnaires were originally designed for adults and showed poor validity. In Vietnam, the International Physical Activity Questionnaire (IPAQ) and Physical Activity Questionnaire for Adolescents (PAQA) have been validated against accelerometers for use in adolescents. ![]() Accurate assessment of physical activity in adolescents at population level is necessary.
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