["European Eating Disorders Review, EarlyView. ", "\nABSTRACT\n\nObjective\nIndividuals with binge‐spectrum eating disorders (EDs) engage in varying degrees of maladaptive and adaptive exercise. Elevated shape/weight concern is associated with engagement in maladaptive and adaptive exercise. No research has examined whether specific facets of shape/weight concern (e.g., fear of weight gain) are associated with degree of maladaptive versus adaptive exercise engagement.\n\n\nMethod\nParticipants were 124 adults with binge‐spectrum EDs enroled in outpatient trials of Enhanced Cognitive Behaviour Therapy. Linear regression models examined associations between each facet of shape and weight concern concurrently at pre‐treatment and degree of maladaptive versus adaptive exercise at pre‐treatment (i.e., percentage maladaptive exercise episodes of total exercise episodes). We explored these relationships across treatment and diagnostic groups.\n\n\nResults\nGreater pre‐treatment fear of weight gain was associated with a greater degree of pre‐treatment maladaptive exercise (p = 0.027). This pattern was marginally significant in the longitudinal model (p = 0.057) and was upheld within the BN‐spectrum (p's < 0.041) but not the BED‐spectrum group.\n\n\nDiscussion\nAccounting for all other facets, fear of weight gain may function as a risk factor for engagement in a greater degree of maladaptive exercise pre‐ and post‐treatment. Future research should examine the mechanisms underlying associations between fear of weight gain and maladaptive exercise engagement.\n\n"]