Sentences with phrase «muscle fiber length»

The NFL is the most useful measurement of muscle fiber length, as it is the length of a muscle fiber after correcting for the average length of the sarcomeres within it.

Muscle fiber length depends upon the extent to which the individual sarcomeres have been stretched.

Indeed, research has confirmed in the frog that single muscle fiber length is directly proportional to the maximum muscle fiber contraction velocity (Edman et al. 1985).

Once we have these two pieces of information we can normalize the muscle fiber length, using the following formula: NFL = muscle fiber length x 2.7 μm / average sarcomere length in muscle fiber (μm).

For the purposes of muscle architecture, the most relevant measure of muscle fiber length is the normalized fiber length (NFL).

In current practice, PCSA tends to be estimated based on direct measurements of muscle volume and muscle fiber length, although researchers are working on developing models for more accurate estimations that reduce the effects of these limitations (Lee et al. 2015).

Deep muscle stripping helps to, restore normal muscle fiber length, identify and loosen trigger points, and promote local circulation.

Then, all of the hard work is for nothing, with significant reductions in muscle fiber length and potential increases in injury risk.

A study performed on rats showed that the pelvic floor muscle fiber length increases between 21 - 37 % and the quantity of extracellular collagen matrix increases by 140 % in the pelvic floor muscles.

Not exact matches

Take a close look at the meat itself — you'll notice that there are long «grains» (thread - like muscle fibers) running left to right across length of brisket.

Instead, it appears to be related to a much more fundamental metabolic constraint: the length of time required for the animal to reach its theoretical maximum speed, based on the number of «fast twitch» muscle fiber cells in the creature's muscles, as compared to the length of time it takes for those cells to run out of readily available energy.

The plastination process preserves the specimens in incredible detail — muscles are discernible down to their individual fibers — yet with enough similarity to plastic that visitors are not afraid to peer closely and at length.

Subsequent additional twisting, so that the polymer fiber coils like a heavily twisted rubber band, produces a muscle that dramatically contracts along its length when heated, and returns to its initial length when cooled.

Muscle CSA was calculated by dividing the muscle mass by the product of the muscle density coefficient (1.06 g • cm3), muscle Lo, and the fiber length coefficient (EDL: 0.45, soleus: Muscle CSA was calculated by dividing the muscle mass by the product of the muscle density coefficient (1.06 g • cm3), muscle Lo, and the fiber length coefficient (EDL: 0.45, soleus: muscle mass by the product of the muscle density coefficient (1.06 g • cm3), muscle Lo, and the fiber length coefficient (EDL: 0.45, soleus: muscle density coefficient (1.06 g • cm3), muscle Lo, and the fiber length coefficient (EDL: 0.45, soleus: muscle Lo, and the fiber length coefficient (EDL: 0.45, soleus: 0.69).

However, Ackland et al. (2011) explored the moment arm lengths of the neck muscles and found that the upper and middle fibers of the trapezius displayed its greatest force producing capacity during neck extension.

Applying a stress to a long muscle fiber will result in a larger relative length change than the same stress applied to a shorter muscle fiber, all other things being equal.

Thus, increasing muscle fascicle length will mean that you record a lower value of stiffness, even if the individual muscle fibers are themselves now made of stiffer material.

Muscle fascicle length increases more after eccentric training than after concentric training (Ema et al. 2016), probably through a larger increase in the number of sarcomeres in series within the myofibrils of a muscle fiber (Brughelli & Cronin, 2007; Butterfield, Muscle fascicle length increases more after eccentric training than after concentric training (Ema et al. 2016), probably through a larger increase in the number of sarcomeres in series within the myofibrils of a muscle fiber (Brughelli & Cronin, 2007; Butterfield, muscle fiber (Brughelli & Cronin, 2007; Butterfield, 2012).

In contrast, single fiber contraction velocity reported for type I muscle fibers ranges from 0.3 to 1.7 fiber lengths per second, while single fiber contraction velocity reported for type IIA muscle fibers ranges from 0.7 to 3.7 fiber lengths per second.

Such adaptations include shifts in muscle fiber type, alterations in fascicle length and pennation angle, and alterations in factors at the extracellular and cellular level affecting specific tension, which cause an increase in the strength - to - size ratio.

Genetics affect thyroid levels, insulin sensitivity, muscle fiber types, muscle lengths, bone structure, joint size, recovery capabilities, volume tolerance, work capacity and more.

-- Exercise performed by the exertion of effort against a resistance that strengthens and tones the muscle without changing the length of the muscle fibers.

Over the years I've talked in great lengths about the size principle, and you might've thought I was specifically referring to the size of muscle fibers.

Fred C. Hatfield «Dr. Squat» confirmed the training of fast and slow twitch muscle fibers back in 1980 when I was interviewing him for a feature length article in Iron Man magazine.

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.

Muscle fascicles are themselves wrapped around by the perimysium and are comprised of many muscle fibers, which do not always run the length of the muscle fascicle that contains them (Sokoloff & Goslow, Muscle fascicles are themselves wrapped around by the perimysium and are comprised of many muscle fibers, which do not always run the length of the muscle fascicle that contains them (Sokoloff & Goslow, muscle fibers, which do not always run the length of the muscle fascicle that contains them (Sokoloff & Goslow, muscle fascicle that contains them (Sokoloff & Goslow, 1999).

The angle of peak torque can change even after normal strength training, probably because of changes in many of these factors, including neural drive, normalized fiber length, regional muscle size, tendon stiffness, and muscle stiffness.

They are made up of chains of sarcomeres in series, and run the full length of the individual muscle fibers (Månsson et al. 2015).

Factors that shift the angle of peak torque to longer muscle lengths after normal strength training include increases in neural drive at long muscle lengths, increases in normalized fiber length, specific gains in regional muscle size, and increases in muscle stiffness.

As for residual force enhancement, several experiments have found that single muscle fibers subjected to maximal (tetanized) contractions produce lower tension after a being shortened to a standard length, compared to a comparable isometric contraction at the same standard length, without the preceding shortening phase.

Factors that shift the angle of peak torque to shorter muscle lengths after normal strength training include increases in neural drive at short muscle lengths, decreases in normalized fiber length, specific gains in regional muscle size, and increases in tendon stiffness.

When sarcomeres attempt to reduce length by increasing the amount of actin and myosin filaments that overlap, this produces tensile force within the muscle fiber that ultimately leads to muscle contractions.

The length - tension relationship describes the phenomenon whereby a muscle or single muscle fiber displays different levels of maximum isometric force production depending on the length at which it is tested (Gordon et al. 1966).

This change in the optimal length at which torque is developed appears to occur because of an increase in length of the individual muscle fibers (sarcomerogenesis).

The hamstrings have very different muscle architecture from one another, with a range of fiber lengths, pennation angles and physiological cross-sectional areas.

The length - tension relationship is the degree to which the sarcomeres within the muscle fibers overlap.

The intrinsic causative factors are those that are affected by physiology and include the number of active motor units (motor unit recruitment), the muscle fiber type, the blood flow within the muscle, the muscle fiber diameter, the depth of the active muscle fibers within the muscle, the amount of non-muscle tissue between the active muscle fibers and the electrode (De Luca, 1997), and the muscle length (Kamen & Caldwell, 1996).

Currently, it is thought that muscle strains are produced when the energy absorbed during an eccentric contraction is greater than the muscle fibers can handle, but whether increased fascicle lengths enable greater energy to be absorbed is unclear.

This reduces the effective contractile length of muscle fibers, reducing the shortening velocity, and increasing force production (Erskine et al. 2011).

Muscle architecture comprises three main aspects: normalized fiber length (NFL), pennation angle (PA), and physiological cross-sectional area (PCSA)(Lieber & Fridén, 2000; 2001; Ward et al. 2009), although muscle volume is sometimes considered as a fourth independent factor (Luu et al. Muscle architecture comprises three main aspects: normalized fiber length (NFL), pennation angle (PA), and physiological cross-sectional area (PCSA)(Lieber & Fridén, 2000; 2001; Ward et al. 2009), although muscle volume is sometimes considered as a fourth independent factor (Luu et al. muscle volume is sometimes considered as a fourth independent factor (Luu et al. 2015).

As explained above, the inferior fibers of the latissimus dorsi muscle display a peak moment arm length of -10.8 mm at 53 degrees of shoulder flexion and a minimum moment arm length of -2.9 mm at 120 degrees.

Again, this muscle architecture parameter differs between three three regions, and the inferior fibers display the greatest length.

Some muscles have large pennation angles and physiological cross-sectional areas, but short normalized fiber lengths.

Muscle fascicles are bundles of muscle fibers, which do not run the entire length of the fasMuscle fascicles are bundles of muscle fibers, which do not run the entire length of the fasmuscle fibers, which do not run the entire length of the fascicle.

As described above, the inferior fibers of the latissimus dorsi muscle display a peak moment arm length at 71 degrees of shoulder abduction of -38.1 mm and a minimum moment arm length at 10 degrees of -3.3 mm.

The group also outfitted the robot with wires running along its length, similar to an earthworm's longitudinal muscle fibers.