Fig. 6From: Progressive arteriolar vasoconstriction and fatigue during tetanic contractions of rat skeletal muscle are inhibited by α-receptor blockadeChange of relative tetanic force during contraction protocols in alpha adrenergic blocker superfused condition. Force normalized to initial (set 1) denotes the average of first 5 and last 5 contractions from sets 1, 5, and 10 from all groups. Values shown are means ± SE. Significance compared with initial value for each group: *P < 0.05Back to article page