Key result
Transient shortening against maximum isometric tension increased with sarcomere stretch amplitude up to about 8 nm per half-sarcomere, independent of stretch velocity.
Population
Tetanized frog muscle fibres
Design
Preclinical
Authors
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May refine isolated muscle models; leaves open translation to human performance or disease.
Transient shortening against maximum isometric tension after ramp stretches in frog muscle fibers suggests mechanical energy is stored and released by the damped element of cross-bridges.
Cavagna et al. (1994) studied this question. Ramp stretches followed by isotonic release was evaluated on Transient shortening against maximum isometric tension (T(o)). Transient shortening against maximum isometric tension increased with sarcomere stretch amplitude up to about 8 nm per half-sarcomere, independent of stretch velocity.
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