%0 Journal Article %T The effect of two types of respiratory masks during exhaustive activity in corona pandemic on physiological and electrocardiography markers in middle-aged women %J Journal of Sport Biosciences %I University of Tehran %Z 2008-9325 %A Zahedmanesh, Fourozan %A Nasiri, Khadijeh %A Dabidi Roshan, Valiollah %D 2021 %\ 08/23/2021 %V 13 %N 2 %P 227-243 %! The effect of two types of respiratory masks during exhaustive activity in corona pandemic on physiological and electrocardiography markers in middle-aged women %K Respiratory Masks %K Coronavirus 2019 Pandemic %K Maximal Physical Activity %K Electrocardiogram %R 10.22059/jsb.2021.321478.1463 %X Background and aim: Current study aim was to examine the effects of wearing surgical and N95 facemasks on response of the physiological and electrocardiography markers include; QRS complex, QT interval, ST depression and P amplitude during exhaustive maximal exercise in middle-aged women. Methods; In a semi- experimental protocol, 36 healthy volunteers females (mean age and BMI of 30.3 ± 3.9 years and 22.47 ± 3.1 kg/m2, respectively) randomly allocated to three groups of 12 peoples consist to; Max-N95 mask, Max-Surgical mask, and Max-Nomask). Subjects in the aforesaid groups performed a maximal Bruce protocol, while wearing a surgical mask, an N95 mask and without a mask, respectively. Physiological and electrocardiography parameters and time to exhaustion were compared. Data was analyzed to one-way ANOVA at P≤ 0.05 level.Result: Maximal exercising with N95 mask was associated with a significant decrease in QTc interval levels, as compared to Max-Surgical mask (P<0.05) and Max-Nomask (P<0.027) groups. Although, the intergroup differences increase in heart rate and QRS following Bruce protocol were not differ significantly, very nearly significant level (P value was 0.073 and 0.075, respectively). Conclusion: In healthy subjects, supervised maximal physical activity, particularly with a surgical mask is feasible, safe, and associated with only minor changes in ECG and physiological parameters, specifically a mild decrease in QTc. Future studies should examine impact of physical activity with various intensities, while using any mask in aged persons and or suffering from chronic inflammatory diseases. %U https://jsb.ut.ac.ir/article_82505_0da58a162442132c225cd9775c050958.pdf