The aims of the present study were to determine the extent to which unhealthy compensatory behaviours are observed in synchronized swimmers, and to examine the relationships between perfectionism, body-esteem dimensions, and restrained eating. Thirty-three elite adolescent synchronized swimmers completed the Multidimensional Perfectionism Scale (MPS-H), the Body-Esteem Scale, the Dietary Restraint Scale, and a self-report questionnaire during their pre-competitive period. The participants reported that they perceived themselves to be overweight, that they used weight loss methods such as self-induced vomiting, fasting, and intensive exercise, and unhealthy weight control behaviours such as skipping meals. The swimmers attributed the pressure to lose weight to team-mates, coaches, and themselves. Results showed that self-oriented perfectionism was significantly associated with dietary restraint and that body-esteem weight satisfaction has a mediator role between self-oriented perfectionism and dietary restraint. Additional research is required to examine the thrust of these results and the effectiveness of interventions that help prevent disordered eating patterns.