Key result
An acute bout of eccentric contraction potentiates titin-based passive force, maximum active force at long sarcomere lengths, and length-dependent activation in rat fast-twitch muscles.
Why the study?
It remained unclear whether eccentric contraction of skeletal muscle affects titin stiffness-related contractile properties.
Eccentric contraction potentiates titin stiffness-related contractile properties in rat fast-twitch muscles, which may help resist muscle fatigue.
May enhance exercise performance via titin; leaves open cardiac translation and clinical relevance.
It remains unclear whether eccentric contraction of skeletal muscle affects titin stiffness-related contractile properties. Here, we provide evidence that an acute bout of eccentric contraction can potentiate titin-based passive force, maximum active force at long sarcomere lengths, and length-dependent activation. This potentiation may resist muscle fatigue in the muscles of the exercising body.
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Shi et al. (2022) studied this question. An acute bout of eccentric contraction potentiates titin-based passive force, maximum active force at long sarcomere lengths, and length-dependent activation in rat fast-twitch muscles.
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