<p dir="ltr">SUPPLEMENTAL MATERIAL<br></p><p dir="ltr"><b>Supplementary Table 1. </b>Sex-based multiple linear regression of factors associated with VO<sub>2</sub>peak</p><p dir="ltr"><b>Supplementary Figure 1.</b> Cohort based scatterplot of the relationship between Peak oxygen uptake (L/min) and A) Left Atrial Volume (n=559); B) Left Atrial Reservoir strain (n=512); C) Left Atrial Conduit Strain (n=512) and D) Contractile Strain (n=512)</p><p dir="ltr"><b>Supplementary Figure 2.</b>Cohort based scatterplot of the relationship between Peak oxygen uptake (L/min) and A) Left Atrial Volume (n=304); B) Left Atrial Reservoir strain (n=270); C) Left Atrial Conduit Strain (n=270) and D) Contractile Strain (n=270) in Males</p><p dir="ltr"><b>Supplementary Figure 3.</b> Cohort based scatterplot of the relationship between Peak oxygen uptake (L/min) and A) Left Atrial Volume (n=255); B) Left Atrial Reservoir strain (n=242); C) Left Atrial Conduit Strain (n=242) and D) Contractile Strain (n=242) in Females</p><p dir="ltr"><b>Supplementary Figure 4.</b> Analysis of LAE and LA/LV in non-athletic males (n=161) and non-athletic females (n=193).</p><p dir="ltr"><b>Supplementary Figure 5.</b> Scatterplot of the relationship between Peak oxygen uptake (L/min) and A) LV Volume and B) Heart Rate Reserve</p><p dir="ltr"><b>Supplementary Figure 6.</b> Sex based scatterplot of the relationship between Peak oxygen uptake (L/min) and A) Left Atrial Volume (n=205); B) Left Atrial Reservoir strain (n=180); C) Left Atrial Conduit Strain (n=180) and D) Contractile Strain (n=180) in athletes</p><p dir="ltr"><b>Supplementary Figure 7.</b> Sex based scatterplot of the relationship between Peak oxygen uptake (L/min) and A) Left Atrial Volume (n=354); B) Left Atrial Reservoir strain (n=332); C) Left Atrial Conduit Strain (n=332) and D) Contractile Strain (n=332) in non-athletes</p>