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The tension response (upper trace) to a ramp stretch (bottom trace; SL, sarcomere length) in a slow-twitch muscle fibre bundle at 10 °C before (A) and after (C) warming to 35 °C (B). Note that warming the preparation reduces the size of the tension response and the effects are completely reversible. Arrowheads indicate the break, corresponding to P1 tension, seen on the rising phase of the tension response.
