A systematic review of reliability and objective criterion - related validity of physical activity questionnaires .
Helmerhorst , H. , Brage , S. , Warren , J. , Besson , H. and Ekelund , U. ( 2012 ) .
A systematic review of reliability and objective criterion - related validity of physical activity questionnaires .
Helmerhorst , H. , Brage , S. , Warren , J. , Besson , H. and Ekelund , U. ( 2012 ) .