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. 2021 May 31;12:679232. doi: 10.3389/fphys.2021.679232

TABLE 4.

Pearson’s product-moment correlations (r) and level of significance (p) between the absolute and (lean) body mass normalized V.O2max and cardio-circulatory variables.

Absolute Relative


kg1 kg1 LBM


r p r p r p
V.O2max (L⋅min–1) Q.max (L⋅min–1) 0.76 <0.001 0.75 <0.001 0.66 <0.001
SVmax (mL) 0.71 <0.001 0.72 <0.001 0.55 0.005
HV (mL) 0.68 0.002 0.46 0.04 0.45 0.03
LVEDD (mm) 0.30 0.18 0.56 0.006 0.47 0.03
LVMM (g) 0.58 0.003 0.43 0.03 0.38 0.06
Hbmass (g) 0.67 0.002 0.59 0.008 0.43 0.04
BVrest (mL) 0.65 0.001 0.63 0.001 0.40 0.06
BVmax (mL) 0.69 0.002 0.61 0.004 0.45 0.04
avDO2max (mL⋅dL–1) −0.08 0.71 0.03 0.90 0.04 0.87
ΔSpO2max (%) −0.42 0.04 −0.37 0.08 −0.29 0.17
HRmax (bpm) −0.14 0.51 −0.35 0.09 −0.38 0.07
Q.max (L⋅min–1) HV (mL) 0.64 0.001 0.49 0.02 0.49 0.02
BVrest (mL) 0.64 0.001 0.50 0.01 0.42 0.04
BVmax (mL) 0.68 0.001 0.54 0.009 0.46 0.03
SVmax (mL) 0.96 <0.001 0.94 <0.001 0.93 <0.001
ΔSpO2max (%) −0.58 0.005 −0.66 <0.001 −0.57 0.005
HRmax (bpm) −0.53 0.007
LVMM (g) 0.44 0.03 0.25 0.26 0.21 0.33
SVmax (mL) BVrest (mL) 0.65 0.001 0.45 0.03 0.40 0.05
BVmax (mL) 0.70 <0.001 0.53 0.01 0.49 0.02
HV (mL) 0.66 0.001 0.50 0.01 0.51 0.01
LVEDD (mm) 0.43 0.004 0.31 0.15 0.25 0.24
LVMM (g) 0.52 0.01 0.32 0.14 0.32 0.13
HV (mL) BVrest (mL) 0.73 0.002 0.52 0.02 0.55 0.007
BVmax (mL) 0.77 <0.001 0.61 0.03 0.65 0.001
LVEDD (mm) 0.61 0.003 0.36 0.10 0.37 0.08
LVEDD (mm) BVrest (mL) 0.63 0.001 0.55 0.006 0.51 0.01
BVmax (mL) 0.58 0.006 0.50 0.02 0.25 0.05

LBM, lean body mass; V.O2max, maximum oxygen uptake; Q.rest, cardiac output at rest; Q.max, maximum cardiac output; SVrest, stroke volume at rest; SVmax, maximum stroke volume; HV, heart volume; Hbmass, hemoglobin mass; BVmax, blood volume at maximum exercise; avDO2max, arteriovenous oxygen difference at maximum exercise; LVEDD, left ventricular end-diastolic diameter; LVMM, left ventricular muscle mass; SpO2max, peripheral oxygen saturation at maximum exercise.