Submaximal exercise cardiac output is increased by 4 weeks of sprint interval training in young healthy males with low initial Q̇-V̇O2: Importance of cardiac response phenotype. oleh Robert F Bentley, Joshua H Jones, Daniel M Hirai, Joel T Zelt, Matthew D Giles, James P Raleigh, Joe Quadrilatero, Brendon J Gurd, J Alberto Neder, Michael E Tschakovsky