“…Overall, 14 articles (29, 33,39,40,43,44,48,50,55,58,61,62,64,66) reported the relationship between PA and psychological and/or behavioral problems during the COVID-19 pandemic (Table 2). To measure the PA levels, ten studies (29, 33, 40, 43, 44, 50, 58, 62, 64, 66) used a self-designed questionnaire, three studies adopted a validated questionnaire including the International Physical Activity Questionnaire Short Form (IPAQ-SF) (48,55) and Goldin-Shepard Leisure-The Physical Activity Questionnaire (61), and one study utilized an accelerometer (39). To identify the occurrence of psychological and/or behavioral problems, nine studies (29, 33, 40, 43, 44, 58, 62, 64, 66) used a self-designed questionnaire where 5 studies employed a validate questionnaire such as the simplified Chinese Profile of Mood Status (POMS) (48), Depression, Anxiety, Stress Scale-21 (DASS-21) (39), The Psychological Distress Index (50), 9-Items Patient Health Questionnaire (PHQ-9) (55) and Generalized Anxiety Disorder Scale (GAD-7) (55), and Brief Symptom Inventory (BSI) (61).…”