The aim of this study was to examine the cardiopulmonary effects of using different types of mouthguards during medium and high intensities in elite Egyptian boxing athletes. Eighteen Egyptian elite male boxers (age range 18-24 years) registered in the Egyptian boxing federation, volunteered to contribute in the study. Participants were subjected to a cardiopulmonary exercise testing on a treadmill in three conditions (without mouthguard, NM; with stock mouthguard, SM; and with custom fitted mouthguard, CFM) during medium and high intensities. Heart rate HR, minute ventilation VE, Oxygen uptake Vo2, breathing frequency BF, and tidal volume TV were collected for each athlete. Repeated measures ANOVAs were used to determine statistical differences. Results showed that using CFM hasn`t significant effect (P > 0.05) on HR, VE, Vo2, BF, and TV while exercising at either medium or high intensity. Data noted significant effect (P > 0.05) on Vo2 mean (43.54 ± 5.68 mL.kg-1.min-1) while wearing SM at high intensity in comparison with NM and CFM respectively (50.37 ± 5.34 and 49.48 ± 3.65 mL.kg-1.min-1). It can be concluded that boxing athletes can wear CFM during medium or high intensity exercises without negative effects on their cardiopulmonary performance. These statistics demonstrate extra support for governing bodies to encourage athletes to use CFM.
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