Feasibility and Preliminary Effects of a Structured Resistance Training Program in Children Aged 10-14 Years

Feasibility and Preliminary Effects of a Structured Resistance Training Programme in Children Aged 10-14 Years: A Randomised Controlled Pilot Study

This study is a randomised controlled pilot trial designed to evaluate the feasibility, safety, and preliminary efficacy of a 12-week resistance training intervention in children aged 10-14 years. The study adheres to the CONSORT extension for randomised pilot and feasibility trials and incorporates key elements of the SPIRIT guidelines for clinical trial protocols.

The primary purpose of the study is to assess feasibility-related outcomes and to generate effect size estimates to inform the design of a subsequent fully powered randomised controlled trial (RCT).

Inclusion Criteria:

• Children aged 10-14 years
• Ability to safely participate in supervised resistance training
• Written informed consent from a parent or legal guardian
• Assent provided by the child participant
• Willingness to comply with all study procedures and attend training sessions

Exclusion Criteria:

• Acute illness at the time of enrolment
• Recent musculoskeletal injury or immobilisation
• Chronic cardiovascular, metabolic, or endocrine disorders
• Use of medications that may affect muscle composition or function
• Any medical or psychological condition that may compromise safety or adherence