fast-twitch fibers

fast-twitch fi·bers

(fast-twich fī'bĕrz)
Histologically distinct skeletal muscle fibers that generate energy rapidly and are active in quick, powerful actions; subclassified as types IIa and IIb.
Synonym(s): fast glycolytic (FG) fibers, fast-oxidative-glycolytic (FOG) fibers, Type II fibers.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
But I've found that, after lifting weights for so long and not getting in touch with my fast-twitch fibers, the snappiness that my body had [has gone].'
A point guard for the Raiders' basketball team, Keith is a bundle of fast-twitch fibers, hard to bring down despite his size.
Builds strength - Sprints are a type of anaerobic exercise, this means that they will trigger muscle building, increasing the size and strength of fast-twitch fibers. With the correct nutrition and recovery, this will lead to muscle building, allowing your body to become leaner and enabling you to run faster, longer, and more efficiently.
The control group evidenced a normal predominance in the glycolytic fibers and fast-twitch fibers in the extensor carpi radialis longus muscle.
Endurance of the muscle is determined by slow-twitch fibers and while power is determined by fast-twitch fibers. The number of fast-twitch fiber is more in men compared to women.
Their lifestyle requires them "to rapidly climb up trees, swing around in the branches." In that respect, they benefit from their strength and from the fast-twitch fibers that give it to them.
Expression of aquaporin-4 in fast-twitch fibers of mammalian skeletal muscle.
In control group, extensor carpi radialis longus evidenced its normal predominance of glycolytic fast-twitch fibers (Type IIB), while the soleus its oxidative slow-twitch fibers normal pattern (Type I), Table I.
Muscle fibers can be grouped into three major categories: slow-twitch type I fibers with high capillary density and high oxidative capacity adapted to endurance exercise, fast-twitch fibers type IIb, which have low capillary density and low oxidative capacity ideal for sprint and anaerobic performance, and type IIa fibers that show intermediate characteristics [13].
"The fast-twitch fibers are activated when a quick reaction is needed, such as preventing an active fall.