Effects of wearing a surgical mask on thermoregulation and respiratory parameters during exercise with hyperthermia-induced hyperventilation

The increase in core temperature during exercise a hot environment causes hyperventilation (hyperthermia-induced hyperventilation), which decreases the partial pressure of arterial blood carbon dioxide. However, effects on body wearing surgical mask that would cause hyperthermia-induced have not been clarified. Therefore, we investigated such effects. Ten healthy men participated study. A 44-minute steady-state load cycling (55% peak oxygen uptake) was performed under environmental conditions (30℃, 70% relative humidity). Two experimental were set: exercising with face (MASK) and without (CON). experiment conducted as randomized crossover design. Body temperatures, respiratory gas exchange, subjective indices measured exercise. In terms physiological indices, rate only revealed main effect significantly lower MASK than CON at 44 min (CON 41.0±19.2 breaths/min, 35.6±11.2 breaths/min p=0.029). No significant differences observed between other parameters. As for dyspnea showed condition × time interaction (p=0.016), higher starting 5 minutes through end 4.5±3.5 8.5±2.1 p=0.016). measures. conclusion, moderate-intensity prolonged worsened dyspnea, but no or indices.