Fig. 3From: Progressive arteriolar vasoconstriction and fatigue during tetanic contractions of rat skeletal muscle are inhibited by α-receptor blockadeRelative changes of arteriolar and venular diameter immediately after contractions. Arteriolar and venular diameter changes relative to pre-contraction values (which was unchanged during the course of the experiment) at sets 1, 5 and 10 from 0.2-ms pulse duration condition (open bars) and 4ms pulse duration condition (closed bars). Measurements were made immediately after contractions in each condition. Values are means ± SE. Significance compared with pre-contraction diameter for each condition: *P < 0.05Back to article page