Baseline Function by Echocardiography.

Echocardiographic parameters: heart rate (HR), LV posterior wall at diastole (PW d), fractional shortening (FS), flow velocity of the mitral valve E wave (MV E), flow velocities of the mitral valve E and A waves expressed as a ratio (E/A), isovolumic relaxation time (IVRT), TEI index, the flow velocity of the mitral valve E wave to the tissue velocity of the lateral annular E wave ratio (E/Ela), and LV dimension during diastole (LVDd) and systole (LVDs). All values are expressed as mean±s.e.m.
*P<0.05.
HCR, high capacity runner (n = 6), LCR, low capacity runner (n = 5).