Abstract：
During the COVID-19 pandemic, studies of the physiological effects of masking during exercise have been rare.
Twelve healthcare workers performed a cardiopulmonary exercise test while wearing a surgical mask, an N95 mask, or no mask. Variables were collected at rest, warm-up, anaerobic threshold, and maximal exercise.
From rest to maximal exercise, both the surgical and N95 masks decreased inspiratory flow, minute ventilation, and prolonged inspiratory time compared to the no mask condition. Oxygen uptake (VO2) and oxygen pulse (VO2/HR) decreased at rest, warm-up, and maximal exercise in both the surgical and N95 mask conditions (vs. no mask). At the anaerobic threshold, the surgical mask also led to a reduction of oxygen uptake and oxygen pulse compared to no mask. The maximal oxygen uptake (VO2% predicted) also decreased in both the surgical and N95 mask conditions. In addition, the severity of dyspnea increased, and exercise time decreased for both surgical and N95 masks. Compared to no mask, wearing an N95 mask led to lower breathing frequency and lower ventilation efficacy (assessed by VE/VCO2 and VE/VO2) from rest to maximal exercise (all p < 0.05 for trend). Wearing an N95 also led to retention of carbon dioxide (p < 0.05 for trend).
Wearing a surgical mask leads to a somewhat negative impact on cardiopulmonary function, and this effect is more serious with an N95 mask. Attention should be paid to exercise while wearing surgical or N95 masks.
Twelve healthcare workers performed a cardiopulmonary exercise test while wearing a surgical mask, an N95 mask, or no mask. Variables were collected at rest, warm-up, anaerobic threshold, and maximal exercise.
From rest to maximal exercise, both the surgical and N95 masks decreased inspiratory flow, minute ventilation, and prolonged inspiratory time compared to the no mask condition. Oxygen uptake (VO2) and oxygen pulse (VO2/HR) decreased at rest, warm-up, and maximal exercise in both the surgical and N95 mask conditions (vs. no mask). At the anaerobic threshold, the surgical mask also led to a reduction of oxygen uptake and oxygen pulse compared to no mask. The maximal oxygen uptake (VO2% predicted) also decreased in both the surgical and N95 mask conditions. In addition, the severity of dyspnea increased, and exercise time decreased for both surgical and N95 masks. Compared to no mask, wearing an N95 mask led to lower breathing frequency and lower ventilation efficacy (assessed by VE/VCO2 and VE/VO2) from rest to maximal exercise (all p < 0.05 for trend). Wearing an N95 also led to retention of carbon dioxide (p < 0.05 for trend).
Wearing a surgical mask leads to a somewhat negative impact on cardiopulmonary function, and this effect is more serious with an N95 mask. Attention should be paid to exercise while wearing surgical or N95 masks.
摘要：
在COVID-19大流行期间，对运动过程中掩蔽的生理影响的研究很少。
12名医护人员戴着外科口罩进行了心肺运动试验，一个N95面具,或者没有面具。变量是在休息时收集的，热身,无氧阈值，最大限度的锻炼。
从休息到最大限度的锻炼，手术面罩和N95面罩都减少了吸气流量，分钟通风,与无面罩条件相比，吸气时间延长。静息时摄氧量（VO2）和氧脉搏（VO2/HR）降低，热身,在手术和N95面罩条件下进行最大限度的锻炼(与没有面具)。在无氧阈值，与没有面罩相比，外科面罩还减少了摄氧量和氧气脉冲。在手术和N95面罩条件下，最大摄氧量（预测的VO2％）也降低。此外,呼吸困难的严重程度增加，手术和N95口罩的运动时间都减少了。与没有面具相比，佩戴N95面罩导致从休息到最大运动的呼吸频率降低和通气功效降低(通过VE/VCO2和VE/VO2评估)(趋势均p<0.05).佩戴N95也导致二氧化碳的保留(趋势p<0.05)。
佩戴外科口罩会对心肺功能产生一定的负面影响，这种影响在使用N95面罩时更为严重。戴手术或N95口罩时应注意锻炼。
12名医护人员戴着外科口罩进行了心肺运动试验，一个N95面具,或者没有面具。变量是在休息时收集的，热身,无氧阈值，最大限度的锻炼。
从休息到最大限度的锻炼，手术面罩和N95面罩都减少了吸气流量，分钟通风,与无面罩条件相比，吸气时间延长。静息时摄氧量（VO2）和氧脉搏（VO2/HR）降低，热身,在手术和N95面罩条件下进行最大限度的锻炼(与没有面具)。在无氧阈值，与没有面罩相比，外科面罩还减少了摄氧量和氧气脉冲。在手术和N95面罩条件下，最大摄氧量（预测的VO2％）也降低。此外,呼吸困难的严重程度增加，手术和N95口罩的运动时间都减少了。与没有面具相比，佩戴N95面罩导致从休息到最大运动的呼吸频率降低和通气功效降低(通过VE/VCO2和VE/VO2评估)(趋势均p<0.05).佩戴N95也导致二氧化碳的保留(趋势p<0.05)。
佩戴外科口罩会对心肺功能产生一定的负面影响，这种影响在使用N95面罩时更为严重。戴手术或N95口罩时应注意锻炼。
