Comparing flywheel and weight stack resistance exercise in children and adults
KidREx - Muscle Adaptations in Children and Adults Following a Twelve-week of Resistance Exercise Period Using Either Flywheel or Traditional Weight Stack Devices - a Randomized Controlled Study
NA · Region Jönköping County · NCT06698055
This study tests whether flywheel or traditional weight training helps kids and adults build muscle and strength over 12 weeks.
Quick facts
| Phase | NA |
|---|---|
| Study type | Interventional |
| Enrollment | 96 (estimated) |
| Ages | 9 Years to 50 Years |
| Sex | All |
| Sponsor | Region Jönköping County (other gov) |
| Locations | 1 site (Eksjö, Region Jönköping County) |
| Trial ID | NCT06698055 on ClinicalTrials.gov |
What this trial studies
This trial investigates the effects of two types of resistance exercise—flywheel and traditional weight stack—on muscle hypertrophy and strength in healthy children aged 9 to 13 and adults aged 18 to 50. Participants will be randomly assigned to one of three groups: a control group, a traditional resistance exercise group, or a flywheel training group. Over a 12-week training period, participants will perform leg press and leg extension exercises, followed by an 8-week detraining phase. The study aims to assess the impact of resistance exercise on muscle development and the potential effects on children's growth plates using magnetic resonance imaging.
Who should consider this trial
Good fit: Ideal candidates include healthy children aged 9 to 13 and adults aged 18 to 50 who are not engaged in heavy resistance training.
Not a fit: Patients with neuromuscular diseases or previous/current musculoskeletal injuries that prevent resistance exercise may not benefit from this study.
Why it matters
Potential benefit: If successful, this study could provide insights into safe and effective resistance training methods for children and adults, potentially enhancing muscle development without harming growth plates.
How similar studies have performed: Previous studies have indicated that resistance exercise does not negatively impact growth in children, but this specific approach using MRI to assess the physis is novel.
Eligibility criteria
Show full inclusion / exclusion criteria
Inclusion Criteria: * Adults at the age of 18 to 50 at time of inclusion. * Children at the age of nine to 13 (attending Swedish middle school) at time of inclusion Exclusion Criteria: * Neuromuscular disease. * Previous or current musculoskeletal injury, primarily of the lower limb, preventing resistance exercise. * Heavy resistance training of the lower limb at inclusion (i.e., more than one session per week of weight training of the lower limb or other equivalent activity)
Where this trial is running
Eksjö, Region Jönköping County
- Department of Orthopaedic Surgery, Höglandssjukhuset District Hospital Eksjö — Eksjö, Region Jönköping County, Sweden (RECRUITING)
Study contacts
- Principal investigator: Björn A Alkner, MD, PhD — Department of Orthopaedic Surgery, Eksjö, Region Jönköping County and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
- Study coordinator: Björn A Alkner, MD, PhD
- Email: bjorn.alkner@liu.se
- Phone: +46736357676
How to participate
- Review the eligibility criteria above with your treating physician.
- Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
- Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions: Resistance Exercise, Muscle Hypertrophy, Skeletal Muscle, EMG, Magnetic Resonance Imaging, Growth Plate Early Closing, Children, Adult, Flywheel Training