Effectiveness of Hatha Yoga and From Feeling to Seeing the Body (FSB) in Female Adolescents and Young Adults With Eating Disorders.

Background: Eating Disorders (EDs) are characterized by significant disturbances in eating behaviors and body image, where the body itself becomes a primary medium for the expression of psychological distress. Body image plays a crucial role in both the development and maintenance of EDs. Historically, research has focused on negative body image, with substantial evidence linking body image distortion to long-term outcomes in anorexia nervosa, both during adolescence and adulthood. However, recent research has shifted towards exploring the multidimensional construct of Positive Body Image (PBI) and the integration of body-focused interventions into standard therapeutic protocols. The Embodied Self Model provides a comprehensive framework that supports self-esteem, positive body image, and intuitive eating as protective factors against EDs and related symptoms. According to this model, the core of ED symptoms lies in the relationship an individual has with their own body. This relationship is reflected in how the body is experienced, nurtured, cared for, and accepted-collectively referred to as embodiment. The model offers strategies to reconnect individuals with themselves through the development of Body Appreciation, Body Functionality, Body Image Flexibility, Mindful Attunement, and Self-Compassion. Recent studies have evaluated the effectiveness of embodiment-based interventions, such as yoga, demonstrating their utility in treating EDs and improving positive embodiment outcomes. In this context, an intervention called From Feeling to Seeing the Body (FSB) was developed, which aims to enhance body awareness through sensory, motor, cognitive, and emotional experiences.

Endpoints: The primary aim of this study is to demonstrate that embodiment interventions can improve body image and eating behaviors in patients with Eating Disorders. Primary Endpoint: 1. Dysfunctional eating behaviors and body dissatisfaction, measured by the Thinness Drive, Bulimia, and Body Dissatisfaction subscales of the Eating Disorder Inventory-3 (EDI-3). Each subscale will be scored and reported independently, collected at four time points (T0, T1, T2, and T3). Secondary Endpoint: 2. Embodiment, measured by the Experience of Embodiment Scale (EES), collected at four time points (T0, T1, T2, and T3). Other Endpoints: 3. Interoceptive awareness, measured by the Multidimensional Assessment of Interoceptive Awareness (MAIA). 4. Body appreciation, measured by the Body Appreciation Scale-2 (BAS-2). 5. Functionality appreciation, measured by the Functionality Appreciation Scale (FAS). 6. Mindfulness, measured by the Five Facet Mindfulness Questionnaire (FFMQ). 7. Self-compassion, measured by the Self-Compassion Scale (SCS). 8. Body image perception and representation, measured by the "Mi Disegno" body drawing task. Analysis Method: Each instrument will be scored and reported independently. Endpoints 3-7 will be collected at four time points (T0, T1, T2, and T3); endpoint 8 will be collected at T0 and T3 only.

Methods: This study will involve 54 patients from the Provincial Center for Eating Disorders of Treviso (AULSS2), who are receiving outpatient care and meet the inclusion criteria. Patients will be randomly assigned to one of the following three groups: Control (C), Yoga (Y), and FSB (From Feeling to Seeing the Body).

Procedures: Screening Phase: Eligibility for participation will be assessed based on the inclusion/exclusion criteria before enrollment. Enrollment Procedure: Eligible patients will be invited to participate in the study, and informed consent will be provided. Intervention Assignment: Participants will be randomly assigned to one of the three groups (C, Y, FSB) using a Research Randomizer. Intervention: Each group will participate in an identical number of sessions, with the same structure maintained across all groups.

Data Collection: Self-report questionnaires will be administered at four time points: T0 (pre-treatment), T1 (post-treatment), T2 (one month post-treatment), and T3 (three months post-treatment). Self-Report Questionnaires: The following validated self-report questionnaires will be used to measure the key variables: Negative Body Image and Eating Behaviors: Subscales of Thinness Drive, Bulimia, and Body Dissatisfaction from the Eating Disorder Inventory-3 (EDI-3). Embodiment: Experience of Embodiment Scale (EES). Interoceptive Awareness: Multidimensional Assessment of Interoceptive Awareness (MAIA). Body Appreciation: Body Appreciation Scale-2 (BAS-2). Functionality Appreciation: Functionality Appreciation Scale (FAS). Mindfulness: Five Facet Mindfulness Questionnaire (FFMQ). Self-Compassion: Self-Compassion Scale (SCS). Body Image: "Mi Disegno".

Inclusion criteria

• Outpatients receiving treatment at the CPD DNA (Centro Provinciale per i Disturbi della Nutrizione e dell'Alimentazione) in Treviso;
• Diagnosis of Anorexia Nervosa (AN) and/or Bulimia Nervosa (BN);
• Body mass index (BMI) ≥ 17 kg/m²;
• Clinically stable condition during the previous month (i.e., stable weight and no worsening of clinical symptomatology);
• No planned hospital admissions or discharges within the 3 months following enrollment.

Exclusion criteria

• Sudden worsening of clinical condition;
• Transition during the treatment phase to a higher level of care (i.e., partial hospitalization, residential treatment, or inpatient admission);
• Irregular attendance (i.e., participation in less than 80% of the total scheduled sessions);
• Discharge during the treatment phase;
• Pregnancy: pregnant women will be excluded, as pregnancy is associated with physiological changes in weight and body shape and may exacerbate body dissatisfaction during the pre- and postpartum periods. Therefore, the exclusion of pregnant women is consistent with the study objectives;
• Previous continuous yoga practice (i.e., for more than 6 months).