Effects of moderate-intensity intermittent hypoxic training on health outcomes of patients recovered from COVID-19: the AEROBICOVID study protocol for a randomized controlled trial - Trapé, Átila Alexandre; Camacho-Cardenosa, Marta; Camacho-Cardenosa, Alba; Merellano-Navarro, Eugenio; Rodrigues, Jhennyfer Aline Lima; Lizzi, Elisangela Aparecida da Silva; Sorgi, Carlos Arterio; Papoti, Marcelo; Brazo-Sayavera, Javier (Trials, 2021)