Key result
Single muscle fibers from elite master runners produced 15% less peak absolute force but displayed a 19% higher maximal shortening velocity in type I fibers compared to sedentary controls (P<0.05).
Why the study?
Does elite endurance training alter the isometric force and maximal shortening velocity of single muscle fibers in master runners compared to sedentary controls?
Population
Single chemically permeabilized gastrocnemius fibers from six elite endurance-trained master runners and…
Comparison
Elite endurance training (master runners) vs Age-matched sedentary controls
Design
Cross-sectional
Authors
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May indicate endurance-related fiber adaptations in masters athletes; hypothesis-generating and should not yet change practice.
Cross-Sectional (n=11)
Does elite endurance training alter the isometric force and maximal shortening velocity of single muscle fibers in master runners compared to sedentary controls?
p-value: p=<0.05
Single muscle fibers from elite master runners display specific morphological and contractile properties, such as higher maximal shortening velocity in type I fibers, which may enhance performance during prolonged muscular activity.
Widrick et al. (1996) conducted a cross-sectional in Elite endurance-trained master runners (n=11). Elite endurance training vs. Sedentary controls was evaluated on Peak absolute force and maximal shortening velocity of single muscle fibers (p=<0.05). Single muscle fibers from elite master runners produced 15% less peak absolute force but displayed a 19% higher maximal shortening velocity in type I fibers compared to sedentary controls (P<0.05).
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