Impact of the Elevation Training Mask in CrossFit® Post-SARS-CoV-2 Infection.

The Elevation Training Mask (ETM) 2.0 was used in all 36 training sessions over the 12 weeks of the study with progressive increases in air restriction to simulate altitude training. This methodology of using ETM during exercise was chosen following the study by Porcari et al. The first week, the additional altitude simulation was 914 m and in the second, 1,829 m. These initial 2 weeks served to adjust the use of the ETM during training, as a process of acclimatization to the altitude simulation and airflow restriction. For the period between weeks 3 and 6 (both inclusive) the simulated altitude was 2,743 m, and for weeks 7-12 (both inclusive), the ETM was set to simulate 3658 m altitude.

For the Control Group, the Elevation Training Mask (ETM) 2.0 was used for 12 weeks with the largest openings available and without using the air restriction filters, so that there was little respiratory obstruction and the reduction in air flow was minimal, with the aim of having a simulated ETM treatment