Short Term Effects of Early Respiratory Muscle Training on Respiratory Muscle Strength in Inpatient Acute Stroke

Inclusion Criteria: * Male or female participants aged 18 years or older. * First-ever acute ischemic stroke, with stroke onset 2 to 14 days before enrollment, confirmed by computed tomography (CT) or magnetic resonance imaging (MRI). * National Institutes of Health Stroke Scale (NIHSS) score ≥5, with the presence of hemiparesis. * Baseline maximal inspiratory pressure (MIP) \<80 cmH₂O. * Baseline maximal expiratory pressure (MEP) \<68 cmH₂O. * Able to understand instructions and participate in the respiratory muscle training program. * Willing to comply with the study protocol and provide written informed consent. Exclusion Criteria: * Resting blood pressure \>160/100 mmHg. * Resting peripheral oxygen saturation (SpO₂) \<92%. * Resting heart rate \<40 beats/min or \>110 beats/min. * Fever, defined as body temperature ≥37.5°C. * Previous participation in or experience with a respiratory muscle training program. * Presence of chronic pulmonary disease. * Presence of a tracheostomy tube. * Presence of unstable cardiac disease. * Presence of another neurological disorder associated with respiratory dysfunction. * Presence of an orthopedic or musculoskeletal condition that significantly interferes with respiratory function or the ability to perform respiratory muscle training. * History of major thoracic or abdominal surgery within the previous 3 months.