Participants
Participants were recruited from four PC centres in the city of Zaragoza, Spain: ‘La Jota’, ‘Las Fuentes’, ‘Almozara’ and ‘Parque Goya’. The general practitioners (GPs) of those centres had received indications for offering the possibility to participate in the study to those patients who met the following inclusion criteria: (1) aged 45–75; (2) a BMI higher than 25; and (3) fluent in Spanish. If the patient met these criteria and was interested in participating, an informed consent form was offered for them to sign along with detailed information of the study procedures. Then, a researcher who is not part of the study team assessed if they presented at least two of the following three risk factors: sedentary lifestyle, poor‐quality diet, and at least two binge episodes in a week according to the Bulimic Investigatory Test Edinburgh (BITE; Henderson & Freeman, The sample size calculation was based on the comparison between the study groups on the primary outcome. Considering what previous studies had reported (Alberts et al., 