Key result
Sitting cross-legged for 30 minutes significantly mitigated the reduction in antegrade and mean shear rates compared to sitting flat-footed, but did not impact flow-mediated dilation or arterial stiffness.
Why the study?
Does sitting cross-legged for 30 minutes alter lower limb shear stress patterns, flow-mediated dilation, or arterial stiffness compared to sitting flat-footed in healthy adults?
Does sitting cross-legged for 30 minutes alter lower limb shear stress patterns, flow-mediated dilation, or arterial stiffness compared to sitting flat-footed in healthy adults?
Absolute Event Rate: 3.6% vs 3.2%
p-value: p=0.250
Sitting cross-legged for 30 minutes alters lower limb shear stress patterns by attenuating reductions in mean and antegrade shear rate compared to sitting flat-footed, but does not acutely impact endothelial function or arterial stiffness.
May preserve lower-limb shear rates during sitting; hypothesis-generating for vascular effects of posture and requires confirmation in larger trials.
Prolonged sitting decreases lower limb endothelial function via sustained reductions in mean shear rate. We tested whether 30 min of sitting cross-legged differentially impacts superficial femoral artery shear rate pattern, flow-mediated dilation (FMD), and leg pulse-wave velocity (PWV) compared with sitting flat-footed. Sitting cross-legged attenuated the reduction in mean and antegrade shear rate and increased arterial pressure compared with sitting flat-footed. Superficial femoral artery FMD and leg PWV were unaltered following either sitting position.
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Tremblay et al. (2018) studied Healthy adults (n=11). Sitting cross-legged vs. Sitting flat-footed was evaluated on Relative flow-mediated dilation (FMD) post-intervention (p=0.250). Sitting cross-legged for 30 minutes significantly mitigated the reduction in antegrade and mean shear rates compared to sitting flat-footed, but did not impact flow-mediated dilation or arterial stiffness.
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