Reply to the letter from Manferdelli et al.: 'Muscle O2 diffusion capacity by NIRS: a new approach in the air'. (19th November 2022) - Pilotto, Andrea M.; Adami, Alessandra; Mazzolari, Raffaele; Brocca, Lorenza; Crea, Emanuela; Zuccarelli, Lucrezia; Pellegrino, Maria A.; Bottinelli, Roberto; Grassi, Bruno; Rossiter, Harry B.; Porcelli, Simone