Differential effects of self-weighing in restrained and unrestrained eaters

Behavioural strategies for weight management emphasize the utility of weight monitoring, but its effect among restrained eaters is unstudied. Using an experimental design, this study examined the interactive effects of self-weighing and restrained eating status on the body mass index of university students over 12 weeks. Participants were randomized into a daily weighing group (n = 36), weekly weighing group (n = 31), or weekly heart rate monitoring control group (n = 33). In restrained eaters, daily weighing led to significant weight gain (+1.36 kg) relative to weekly weighing which led to weight loss (−0.77 kg). There was modest support for self-weighing to assist in weight management among unrestrained eaters. Findings suggest that self-weighing frequency had differential effects on weight control depending upon restrained eating status. Further consideration of individual differences may help to tailor clinical and public health recommendations aimed at weight management.