Exploring the efficacy of an acceptance, mindfulness & compassionate-based group intervention for women struggling with their weight (Kg-Free): A randomized controlled trial

Appetite. 2017 May 1;112:107-116. doi: 10.1016/j.appet.2017.01.027. Epub 2017 Jan 21.


This randomized-controlled trial aims to test the efficacy of a group intervention (Kg-Free) for women with overweight or obesity based on mindfulness, ACT and compassion approaches. The intervention aimed to reduce weight self-stigma and unhealthy eating patterns and increase quality-of-life (QoL). Seventy-three women, aged between 18 and 55 years old, with BMI ≥25 without binge-eating seeking weight loss treatment were randomly assigned to intervention or control groups. Kg-Free comprises 10 weekly group sessions plus 2 booster fortnightly sessions, of 2h30 h each. The control group maintained Treatment as Usual (TAU). Data was collected at baseline and at the end of the Kg-Free intervention. Overall, participants enrolled in Kg-Free found the intervention to be very important and helpful when dealing with their weight-related unwanted internal experiences. Moreover, when compared with TAU, the Kg-Free group revealed a significant increased health-related QoL and physical exercise and a reduction of weight self-stigma, unhealthy eating behaviors, BMI, self-criticism, weight-related experiential avoidance and psychopathological symptoms at post-treatment. Results for self-compassion showed a trend towards significance, whereas no significant between-groups differences were found for mindfulness. Taken together, evidence was found for Kg-Free efficacy in reducing weight-related negative experiences and promoting healthy behaviors, psychological functioning, and QoL.

Trial registration: ClinicalTrials.gov NCT02850796.

Keywords: Kg-free intervention; Obesity-related quality-of-life; Overweight and obesity; RCT; Weight-self-stigma.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Adolescent
  • Adult
  • Body Mass Index
  • Body Weight
  • Cognitive Behavioral Therapy / methods*
  • Diet
  • Emotions
  • Empathy*
  • Exercise
  • Feeding Behavior
  • Female
  • Group Processes
  • Health Behavior
  • Humans
  • Middle Aged
  • Mindfulness*
  • Obesity / psychology*
  • Obesity / therapy*
  • Overweight
  • Patient Satisfaction
  • Quality of Life*
  • Self Concept*
  • Treatment Outcome
  • Young Adult

Associated data

  • ClinicalTrials.gov/NCT02850796