The phrase
"contractile properties" refers to the abilities of a muscle or other tissue to contract, or shorten and thicken. It describes how well and how strongly the muscle can contract, which is important for movement and other physiological functions.
Full definition
Physiologists generally divide muscle fibers into three basic types — Slow Twitch, Fast Twitch A, Fast Twitch B — each with its own
distinct contractile properties.
Several physiologic parameters were measured to characterize exercise and muscle properties in these mouse strains, and three key observations support our hypothesis of a role for IL - 15Rα in fast muscle phenotypes: (a) fast muscles with an increased resistance to fatigue; (b) fast muscles with isometric
contractile properties more similar to those of slow muscles; and (c) greater total running activity in IL - 15Rα — KO mice.
But the broad range of
contractile properties across all muscle fibers means that fibers of the same type do not all have the same level of strength, endurance, or speed.
Peripheral factors include muscle size, moment arm length, the length of the fascicles, the prevailing pennation angle of the fibers, the muscle fiber type, and even the single
fiber contractile properties.
This division can be oriented, daughter cells can be pushed inside or outside as result of the mitotic spindle orientation, and asymmetric, daughter cells can acquire distinct components giving them
different contractile properties.
Finally, in a collaboration with Frank Jülicher's group at the Max Planck Institute for the Physics of Complex Systems, we are using these data to develop physical models that will help us understand how local cellular adhesive, elastic and
contractile properties are influenced by PCP proteins and other molecules, and how they combine to produce specific packing geometries at a global level.
One of the main reasons for this is taurine's ability to support
the contractile properties of fast - twitch muscles, therefore helping them to produce peak force.
The study compared the effects of three months of moderate, isometric or dynamic exercises on
the contractile properties of a certain muscle.
(«
Contractile properties» essentially means the amount of strength or force that the muscle can produce.)
A very important point about muscle fiber
contractile properties is that there is a strong inverse relationship between a muscle's strength and its endurance.
The above description of
the contractile properties of each muscle fiber type might lead you to believe that each type of fiber has distinct contractile properties.
The contractile properties discussed earlier tell us what the average contractile properties are for each type of muscle fiber.
There are many properties of skeletal muscle which contribute to muscle quality including fiber type, composition and size;
contractile properties; innervation; capillarity and metabolic capacity [6].
Dependent variables related to muscle force and muscle
contractile properties were measured during different sessions than ROM measures because static stretching, even for short durations, has been shown to cause impairments in force production (8,29).
Although MMG is still in its infancy in comparison with EMG, there are indications that it can be used to assess differences in a range of parameters, including muscle fiber type, muscle force, peripheral fatigue, and
contractile properties (see review by Ibitoye et al. 2014).