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Fig. 9. Effect of strain on force depression due to active shortening in muscles
178 (filled, blue symbols) and 179 (open, red symbols). The solid blue line
represents a regression of the data for muscle 178 (force
depression=-0.01+4.90xstrain, R2=0.64;
P<0.0001), whereas the broken red line represents a regression of
the data for muscle 179 (force depression=-0.93+5.22xstrain,
R2=0.56; P<0.0001). Each type of symbol
represents a different initial length (circles, rest length; squares,
RL+1 mm; diamonds, RL+2 mm; triangles, RL+3 mm).
The muscles were shortened at 100 mm s-1 and stimulated with the 3s
pattern. N=5 animals for each muscle.