Comparison of Hemodynamic and Respiratory Parameters During Physical Activity

"The sequence of mask wearing will be done by drawing lots, in double blind. Only the nurse will be informed of the mask sequence. The doctor will take measurements without seeing the type of mask placed between the athlete's face and the VO2 mask.~The patient will not know which mask will be applied. He will have been informed that he will test three masks (a so-called high-tech mask which will in fact be without a mask, a surgical mask and a general public mask). When the mask is put on, the athlete's eyes will be closed, the sequence without a mask, presented to the subject as a high-tech mask, will be done with a mask that will be put on like a surgical mask or a mask for the general public, except that it will be hollowed out in its center.~The effort tests will be done on a carpet with a filter called COVID on the VO2 masks."