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Association between cardiorespiratory fitness (V̇o2peak) and middle cerebral artery (MCA) pulsatility index (A and C) and MCA mean velocity (B and D). Adults without cardiovascular disease (CVD) risk factors (n = 152) are displayed in A and B, and adults with CVD risk factors (n = 66) in C and D. Females displayed in red triangles, males in blue circles. CVD, cardiovascular disease; MnV, MCA mean velocity; PI, pulsatility index.
