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Effect of age on volume flow and wall shear stress in proximal arterioles of the rat spinotrapezius muscle. Wall shear stress is calculated using in vivo measurements of vessel diameters and flow velocities, assuming a parabolic flow profile and an average blood viscosity of 3.5 centipoise. Values are means ± SEM. *p <0.05 vs. 31-day value. † p < 0.05 vs. 52-day value. Data from Linderman and Boegehold, 1999 (Ref. 56).
