Om at å trene innpustmuskler gjør det lettere å puste normale og uanstrengt etterpå.

http://www.ncbi.nlm.nih.gov/pubmed/22908839

RRMT significantly reduced the energy cost of ventilation, measured as delta VO2/delta V(E) during ISEV, at a depth of 55 fsw. Whether this change was due to reduced work of breathing and/or increased efficiency of the respiratory muscles remains to be determined.