Respiratory muscle strength in volleyball players suffered from COVID-19.

Inspiratory and expiratory muscle strength in COVID-19 players were more affected compared with non-COVID-19 players. Pulmonary functions were mostly preserved in COVID-19 players. Respiratory muscle weakening can affect the performance of female players. Therefore, respiratory muscle strength training could be suggested in female players with COVID-19 to increase respiratory muscle strength and prevent deterioration in performance. TRIAL REGISTRATION (CLINICALTRIALS.GOV): Registration ID: NCT04789512.