High-intensity interval training increases in vivo oxidative capacity with no effect on P(i)?ATP rate in resting human muscle.
Larsen RG, Befroy DE, Kent-Braun JA. High-intensity interval training increases in vivo oxidative capacity with no effect on P(i)?ATP rate in resting human muscle. Am J Physiol Regul Integr Comp Physiol. 2013 Mar 01; 304(5):R333-42.