Facing the undesirable health consequences of being obese, an important question is why some people are not able to resist eating to excess. It is theorized that increased impulsivity at least partly underlies the inability to control eating behaviour; being more impulsive is supposed to make it more difficult to resist food intake. Thirty-three obese children in a residential setting and 31 lean control children are tested. Impulsivity is measured with two behavioural measures (inhibitory control and sensitivity to reward) and questionnaires. Results show that the obese children in treatment were more sensitive to reward and showed less inhibitory control than normal weight children. In addition, the obese children with eating binges were more impulsive than the obese children without eating binges. Most interesting finding was that the children that were the least effective in inhibiting responses, lost less weight in the residential treatment program. To conclude: impulsivity is a personality characteristic that potentially has crucial consequences for the development and maintenance, as well as treatment of obesity.

An inpatient cognitive-behavioral nondiet approach is a promising treatment option for childhood obesity, with lasting effects throughout the 14-month posttreatment.

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BackgroundWithin the Self-Determination Theory (SDT) framework, the first major study aim was to investigate the SDT tenets in an obese adolescent population by examining the factor structure of the Behavioural Regulation in Exercise Questionnaire-2 (BREQ-2) and by investigating associations between physical activity (PA) and motivation in obese adolescents. The second aim was to study differences in motivation according to adolescents' educational level, since lower educated obese adolescent are a sub-risk group for lower PA levels among the obese adolescents. The third aim was to investigate whether attending a residential obesity treatment program could lead to an increase in autonomous motivation towards PA and to see if the treatment effect on motivation was different in low versus high educated youth.MethodsFor the first study aim, the sample comprised 177 obese adolescents at the start of a 10-month multidisciplinary residential obesity treatment program (BMI = 35.9 ± 6.0 kg/m2, 15.1 ± 1.5 years, 62% girls). A subsample of 65 adolescents (stratified by educational level) were divided into low (n = 34) versus high educated (n = 31) as part of the second and third study aim. Motivation was assessed using the BREQ-2 and PA using the Flemish Physical Activity Questionnaire.ResultsExploratory factor analysis showed sufficient validations with the original factor for 17 out of 19 BREQ-2 items. Significant positive correlations were found between PA and the composite score of relative autonomy (r = 0.31, p < 0.001), introjected (r = 0.23, p < 0.01), identified (r = 0.31, p < 0.001) and intrinsic regulation (r = 0.38, p < 0.001). Higher educated adolescents scored higher on the composite score of relative autonomy, introjected, identified and intrinsic regulation at the start of treatment (F = 3.68, p < 0.001). The composite score of relative autonomy, external, identified and intrinsic regulation significantly increased during treatment for all adolescents (F = 6.65, p < 0.001). Introjected regulation significantly increased for lower educated adolescents (F = 25.57, p < 0.001).ConclusionsThe BREQ-2 can be used in an obese adolescent population. Higher levels of autonomous motivation towards PA were related to higher PA levels. Adolescents had increases in both autonomous and controlled forms of motivation during treatment. Special attention for lower educated adolescents during treatment is needed, as they have a lower autonomous motivation at the start of treatment and an increase in introjected regulation during treatment.

This prospective clinical case-control study describes the effect of an inpatient multicomponent treatment programme for obese children and adolescents on their weight and psychological well being. We studied 38 patients and 38 controls on the waiting list, matched for age and gender, referred because of obesity, with a median age of 13 years (range 10-17 years) and a median adjusted body mass index (BMI) of 173% (range 130%-257%). The treatment consisted of a 10-month inpatient programme focussing on attaining a healthy lifestyle by increasing physical activity and offering a healthy diet within a cognitive-behavioural framework. At base line, at the end of the treatment, 6 months and 14 months after completion of the treatment, the adjusted BMI was calculated and psychological variables were measured with the Dutch Eating Behaviour Questionnaire, the Eating Disorder Inventory and the Self-Perception Profile for Children. All patients lost weight during treatment (median )48% of the adjusted BMI, range )4% to )102%), in contrast to the non-treated control subjects (median +6%, range )29% to +27%). The children treated developed a higher self-esteem and were more capable of coping with external eating stimuli. They did not develop anorexia nor bulimia nervosa. At the 6-months follow-up, a median increase in the adjusted BMI of +6% (range )19% to +37%) was found; with an additional increase of +4% (range )30% to +41%) at 14-months follow-up. Conclusion: A multicomponent long-term inpatient treatment programme is a valuable treatment option for obese children, with a lasting effect up to 14 months posttreatment. Nevertheless, more research is needed to characterise those children who regain weight after treatment and how this may be prevented. Keywords Childhood AE Cognitive behaviour therapy Obesity AE TreatmentAbbreviations BMI body mass index AE DEBQ Dutch eating behaviour questionnaire AE EDI eating disorder inventory AE SPPC self-perception profile for children Eur J Pediatr (2003) 162: 391-396

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This study evaluated the short-term effectiveness of a multidisciplinary residential obesity treatment program by describing changes in body weight, related measures, and gross motor co-ordination. Secondarily, it was examined to what extent the amount of relative weight loss achieved by overweight and obese (OW/OB) participants explained the projected improvement in gross motor co-ordination. Thirty-six OW/OB children (aged 10.5 ± 1.4 years, 12 girls and 24 boys) were recruited at the Zeepreventorium VZW (De Haan, Belgium), where they followed a specific program consisting of moderate dietary restriction, psychological support, and physical activity. For reference purposes, an additional group of 36 age-and gender-matched healthy-weight (HW) children was included in the study. Anthropometric measures were recorded and gross motor co-ordination was assessed using the Körperkoordinationstest für Kinder (KTK) on two occasions with an interval of 4 months. Regardless of the test moment, OW/OB participants displayed significantly poorer KTK performances (P < 0.001). However, treatment was found to be efficacious in decreasing body weight (Δ 17.9 ± 3.1%, P < 0.001) and generating a significant progress in gross motor co-ordination performance, with a greater increase in KTK score(s) from baseline to re-test as compared to HW peers (P < 0.01). Within the OW/OB group, the amount of relative weight loss explained 26.9% of the variance in improvement in overall KTK performance. Therefore, multidisciplinary residential treatment and concomitant weight loss can be considered an important means to upgrade OW/OB children's level of gross motor co-ordination, which in turn may promote physical activity participation.

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