Table 2 Mean energy intake, bodyweight, physical activity, and hunger and fullness ratings by portion size condition (SD)

‘Smaller than normal’‘Small-normal’‘Large-normal’
Total energy provided (kcal/d)507454855897
Daily energy intake (kcal/d)2238 (490)2448 (584)2543 (592)
Breakfast441 (154)441 (175)429 (174)
Lunch (total)653 (203)695 (221)768 (210)
Portion313 (13)501 (56)658 (97)
Immediate additional intake339 (196)194 (190)110 (140)
Dinner (total)613 (162)752 (181)851 (214)
Portion338 (22)486 (79)628 (119)
Immediate additional intake275 (154)266 (147)223 (149)
Snack box454 (229)452 (239)428 (218)
Out of study intake (self-reported)78 (91)108 (126)68 (80)
Body weight (kg, Monday)77.0 (10.8)76.6 (10.9)76.8 (10.9)
Body weight (Friday)76.9 (11.0)76.69 (10.6)77.1 (11.0)
MVPA (mins/day)a70.2 (44.0)75.8 (42.0)74.9 (51.6)
MVPA (mins/day) b72.2 (8.0)71.3 (3.8)70.0 (3.9)
Discretionary LTPA (MET mins/week)1024.5 (907.7)1003.0 (985.1)1207.5 (1046.8)
Hunger c310.3 (104.8)288.9 (104.0)284.5 (112.8)
Fullness c432.8 (84.8)424.0 (79.7)432.8 (97.2)
1. All n = 30 except a complete cases, n = 20. b Estimated marginal means and SE from multiply-imputed datasets. c Area under curve of meal ratings across the day. MVPA = FitBit measured moderate to vigorous physical activity with MET ≥3. Discretionary LTPA = leisure time physical activity from self-report. Immediate additional intake refers to additional helpings of the portion size manipulated food consumed at lunch and dessert consumed at dinner