“…Included studies presented 18 different instruments for physical activity measurement. Nineteen studies did not report the instruments used, and from these, only six studies reported information that the used instruments were validated 10,19,47,63,71,76,78,86 . The most used instruments were: the International Physical Activity Questionnaire (IPAQ , 12 studies) 22,36,88,99,102,55,59,60,64,65,76,77,82 , the Global School-Health Survey instrument (GSHS, 8 studies) 11,21,[66][67][68]79,84,96,24,25,29,32,37,41,42,56 , and the Physical Activity Questionnaire for Older Children and Adolescents (PAQ-C and PAQ-A, 10 studies) 12,13,97,101,[16][17][18]31,39,58,…”