Purpose: The primary aim was to compare the functional exercise capacity between obese treatment-seeking people with and without binge eating disorder (BED) and non-obese controls. The secondary aim was to identify clinical variables including eating and physical activity behaviour, physical complaints, psychopathology and physical self-perception variables in obese people with BED that could explain the variability in functional exercise capacity.
Methods: Forty people with BED were compared with 20 age-, gender- and body mass index (BMI)-matched obese persons without BED and 40 age and gender matched non-obese volunteers. A 6-minute walk test (6MWT), the Baecke physical activity questionnaire, the Symptom Checklist-90, the Physical Self-Perception Profile and the Eating Disorder Inventory were administered. Physical complaints before and after the 6MWT were also documented.
Results: The distance achieved on the 6MWT was significantly lower in obese participants with BED (512.1 ± 75.8 m versus 682.7 ± 98.4, p < 0.05) compared to non-obese controls. No significant differences were found between obese participants with and without BED. Participants with BED reported significantly (p < 0.05) more musculoskeletal pain and fatigue after the walk test than obese and non-obese controls. A forward stepwise regression analysis demonstrated that sports participation and perceived physical strength explained 41.7% of the variance on the 6MWT in obese participants with BED.
Conclusion: Physical activity participation, physical self-perception and perceived physical discomfort during walking should be considered when developing rehabilitation programs for obese people with BED.
Implications for rehabilitation: Rehabilitation programmes in people with binge eating disorder should incorporate a functional exercise capacity assessment. Clinicians involved in the rehabilitation of people with binge eating disorder should consider depression and lower self-esteem as potential barriers. Clinicians should take into account the frequently observed physical discomfort when developing rehabilitation programmes for people with binge eating disorder.
Keywords: Binge eating; obesity; physical activity; self-concept; walking.