“…There is now a large body of evidence from over 20 systematic reviews and meta-analyses [ 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 ], published since 2000, of observational and intervention studies assessing diet and physical activity (PA) components associated with weight gain. These report that increased intake of diets characterized by high energy-dense discretionary foods and beverages are associated with weight gain [ 11 , 14 , 17 , 18 , 19 , 21 , 23 , 24 , 25 , 30 ] and limited consumption of discretionary foods and beverages, higher consumption of core foods (e.g., fruit, vegetables, whole grain or dietary fiber) and higher diet quality are associated with reduced weight gain in the adult population [ 10 , 12 , 13 , 15 , 16 , 20 , 22 , 26 , 27 , 28 , 29 , 31 ]. Evidence also consistently reports that moderate-to-vigorous intensity PA (≥150 min/week) is associated with lower weight gain [ 32 , 33 ].…”