Effect of Digital Incentive Spirometry Training in Healthy Adults

This prospective single-group pre-post study investigated the effects of digital incentive spirometry training in healthy adults. Participants were recruited at Taipei Medical University and received training using the TryBreath digital incentive spirometry system, which integrates an incentive spirometer with infrared sensing, ultrasonic wireless data transmission, and a mobile application for real-time feedback and adherence tracking. Participants completed a 3-week intervention period. The target training dose was at least 30 sustained inspirations per day, and at least 10 compliant training days were required for protocol adherence. Pulmonary function, respiratory muscle strength, exercise capacity, and symptom scores were assessed before and after the intervention. Outcome measures included forced expiratory volume in 1 second (FEV1), forced vital capacity (FVC), peak expiratory flow (PEF), maximal inspiratory pressure (MIP), maximal expiratory pressure (MEP), 2-minute step test performance, Borg breathlessness score, and numerical rating scale (NRS) muscle discomfort score.