For adolescents living with higher body weight, changing lifestyle behaviours can be met with challenges due to psychosocial factors, such as mental health and emotional challenges. Few behavioural interventions have included skill development to manage these mental health and emotional challenges.

The feasibility of a dialectical behavioural therapy (DBT)–enhanced lifestyle intervention will be evaluated through a pilot randomised controlled trial. We will recruit 90 adolescents aged 14–17 years with a body mass index Z-score >1.4 and mild-to-moderate depressive symptoms to participate with a caregiver in the trial. Adolescents will be randomised 2:2:1 to one of the three study arms: (A) behavioural lifestyle intervention with DBT skills training, (B) behavioural lifestyle intervention alone (ie, without DBT skills training) or (C) control. The interventions will include two sessions weekly for 16 weeks that include (1) one modified DBT skills training with two facilitators, supervised by a clinical psychologist, combined with one behavioural lifestyle session delivered by a dietitian and/or a kinesiologist and (2) two behavioural lifestyle sessions alone. DBT skills training will consist of teaching mindfulness, emotion regulation, distress tolerance, interpersonal effectiveness and walking the middle path modules. Behavioural sessions will be guided by evidence-based practices for goal setting, dietary counselling, improving sleep, reducing screen time and structured physical activity. The main outcomes are enrolment rates, adherence to the intervention and retention rates for follow-up measurements. The secondary outcome will be changes in the quality of life (Pediatric Quality of Life Inventory) and daily physical activity levels between baseline and immediately post-intervention. Adolescents will participate in a focus group incorporating photo elicitation to explore satisfaction, acceptability and perceived benefits of the study arms.

This study has received ethical approval from the University of Manitoba’s Biomedical Research Ethics Committee (HS24295-H2020:427), Hamilton Health Sciences & McMaster University (HiREB 18159) and The Conjoint Health Research Ethics Board (CHREB), University of Calgary (REB24-1084). Results will be disseminated through publication in peer-reviewed journals and be relevant to researchers and clinicians involved in paediatrics and paediatric weight management.

NCT05338944.

Research in people with relapsing remitting multiple sclerosis (PwRRMS) is increasingly focusing on non-motor symptoms like cognitive impairment, fatigue and depression. Due to the high negative impact on quality of life and high socioeconomic costs based on these symptoms, more specific research to improve non-motor symptoms is needed. Transcutaneous auricular vagus nerve stimulation (taVNS) has been found to be a cognitive enhancer in preclinical research and was successfully used for the treatment of psychiatric and neurological disorders to combat dysfunctional cognitive and affective processes. However, the capacity of taVNS to improve cognitive and other non-motor symptoms in PwRRMS has not been tested yet. The aim of this study is to evaluate the therapeutic potential of taVNS on cognitive processing speed. Based on ample evidence demonstrating that taVNS promotes adaptive cognitive and affective processes, we hypothesised that taVNS would alleviate cognitive processing speed in PwRRMS.

This study protocol describes the prospective, single-centre, SHAM-controlled, single-blinded trial with a planned sample size of 60 participants (30 PwRRMS, with a diagnosis of multiple sclerosis according to McDonald criteria and 30 healthy controls; age: 18–50 years). The Symbol Digit Modalities Test (SDMT) will be used to determine cognitive processing speed, Beck Depression Inventory-II to determine depression and Fatigue Scale for Motor and Cognitive Functions to determine fatigue. The severity of multiple sclerosis will be assessed using the Expanded Disability Status Scale. After baseline assessment, a taVNS protocol (duration: 30 min, tolerance threshold, pulse width: 250 μs, stimulation frequency: 25 Hz, 30 s on/30 s off) will be applied, followed by post-intervention assessment.

The study was reviewed and approved by the local ethics committee of the University Medical Centre Greifswald (study reference number: BB137/24). Clinical trial registration: www.drks.de, number: DRKS00034912. Study results will be disseminated through academic conferences as well as peer-reviewed publications.

DRKS00034912.