“…Five studies did not present data to calculate a mean age [ 33 , 39 , 47 , 52 , 57 ]. Forty-six percent of studies were conducted in North America, four diet [ 29 , 30 , 34 , 36 ], eight activity [ 37 – 41 , 43 , 47 , 48 ] and four mixed [ 53 – 55 , 57 ]; 31% in Europe, three diet [ 28 , 31 , 35 ], four activity [ 42 , 44 , 45 , 49 ] and four mixed [ 51 , 58 – 60 ]; 9% Australia, two diet focused [ 27 , 32 ] and one mixed [ 61 ]; 9% East Asia, one activity [ 46 ] and two mixed focused [ 52 , 56 ]; 3% Africa, one activity focused study [ 50 ] and 3% South America, one diet focused [ 33 ]. Seventy-four percent of studies ( n = 26) included both males and females [ 27 – 30 , 32 , 33 , 35 , 38 – 42 , 44 , 45 , 48 , 49 , 51 – 53 , 55 – 61 ].…”