Force depression decays during shortening in the medial gastrocnemius of the rat.
Force depression due to shortening of activated skeletal muscles has previously been described to be long lasting during isometric contractions following the shortening. In the present study, using the medial gastrocnemius of the rat, effects of force depression have been made apparent during shortening by computationally partially compensating for the direct effect of shortening velocity due to the tension-velocity relation. Evidence was found for the decay and complete disappearance of force depression already during continuation of the shortening contraction to short muscle lengths.
Division of Motion Science, Institute of Sport Science, Friedrich Schiller University, Seidelstraße 20, D-07749 Jena, Germany. Electronic address: i7tiol@t-online.de.
Olaf
O
Till
Division of Motion Science, Institute of Sport Science, Friedrich Schiller University, Seidelstraße 20, D-07749 Jena, Germany; Institute of Sport and Motion Science, University of Stuttgart, Allmandring 28, D-70569 Stuttgart, Germany.
Tobias
T
Siebert
Division of Motion Science, Institute of Sport Science, Friedrich Schiller University, Seidelstraße 20, D-07749 Jena, Germany.
Reinhard
R
Blickhan
D000818:Animals; D008297:Male; D009119:Muscle Contraction; D018482:Muscle, Skeletal / Q000502:physiology*; D051381:Rats; D017208:Rats, Wistar
Force depression; History effect; Skeletal muscle