Can a breath test reveal how muscles make energy? tiny study explores new way to track treatment effects

This small pilot study looked at whether simple breath and urine tests can measure how well muscles produce energy in children with metabolic myopathies (rare muscle disorders). Three participants completed a 12-week at-home physiotherapy program. The goal was to see if these non-invasive tests could detect changes in energy metabolism before and after exercise therapy. The results will help design larger studies to monitor future treatments.