Why the study?
Explanatory approaches to long-standing questions regarding muscular contraction dynamics and molecular and cellular mechanisms underlying eccentric muscle loading remained to be summarised, particularly to address deviations from classic sliding-filament and cross-bridge theories.
Design
Review
Key result
Eccentric muscle loading is characterized by increased force production and reduced metabolic cost, largely explained by the functional role of the giant filament titin acting as a viscoelastic spring.
Authors
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May inform eccentric training protocols; leaves open prospective validation of titin-targeted interventions in muscle disorders.
This review highlights the mechanisms of eccentric muscle contractions, emphasizing the role of titin in explaining linear force increases during active lengthening that deviate from classic sliding-filament theories.
André Tomalka (2023) conducted a review in Eccentric muscle contractions. Eccentric muscle loading vs. Concentric and isometric contractions was evaluated. Eccentric muscle loading is characterized by increased force production and reduced metabolic cost, largely explained by the functional role of the giant filament titin acting as a viscoelastic spring.