The phrase
"eccentric muscle" refers to the type of muscle contraction when it is elongating or stretching out. It happens when you are lowering or lowering a weight and is an important part of exercising and building strength.
Full definition
This fascinating study set out to assess whether velocity - specificity would still occur when training
with eccentric muscle actions at a moderate velocity (60 degrees / s).
Our results suggest that coaches and athletes could effectively implement conditioning strategies that
challenge eccentric muscle actions.
Voluntary activation is lower
during eccentric muscle actions compared to during concentric muscle actions (Westing et al. 1990; Amiridis et al. 1996; Beltman et al. 2004), although some studies have suggested that this effect is limited to untrained people, and that trained individuals are able to reduce this eccentric - specific deficit (Amiridis et al. 1996).
Known as «delayed onset muscle soreness» (DOMS), we typically experience these pains when
eccentric muscle activity is involved and the contracting muscles are forcibly lengthened.1 This mechanical stress triggers an inflammatory response and the production of reactive oxygen species (ROS).
However, no training studies have yet measured whether voluntary activation can be preferentially increased
in eccentric muscle actions after eccentric training (compared to in concentric muscle actions).
• Takes advantage of the stretch shortening cycle → Uses energy stored
by eccentric muscle contraction (lengthening phase) quickly followed by concentric muscle contraction (shortening phase) to generate high amounts of power.
Known as «delayed onset muscle soreness» (DOMS), we typically experience these pains
when eccentric muscle activity is involved and the contracting muscles are forcibly lengthened.1 This mechanical stress triggers an... Continue reading «Turmeric for post-workout recovery»
The best example for this is sled training, which lacks a lengthening,
eccentric muscle motion that's mainly responsible for tissue damage, thereby resulting with lower creatine kinase (the key marker of muscle damage) levels than traditional weight training.
Medicine ball wall throws: «This exercise provides a cardio workout while also improving arm strength on the concentric and
eccentric muscle phases for maximum toning result,» Save says.
When appropriate mechanics are achieved during
eccentric muscle lengthening the proper groove has been established ultimately promoting refined mechanics on the subsequent concentric phase.
Before going in to the details of concentric and
eccentric muscle movements, I would like you to discover a very important fact about muscular tension.
To learn more, here's an interesting research article about using eccentric exercise to tear muscle tissue more effectively:
Eccentric Muscle Fatigue Article.
E.J. Higbie at University of Georgia tells us, «Greater maximum force can be developed during
maximal eccentric muscle actions than during concentric.»
Secondly, the bench press can be classified according to the variation, including various grip widths, concentric
vs. eccentric muscle actions, and pressing angles depending on the angle of the bench relative to the floor.
In contrast, they found no difference in peak bar velocity at all loads except 75 % of 1RM when comparing the bench press throw immediately preceded by a
fast eccentric muscle action and the concentric - only muscle action condition.
(One scene in particular, which features Keaton's character being violently tortured, demonstrates his unique skill at
injecting eccentric muscle into even the most underwritten characters.)
Since strength is specific, then: strength training
with eccentric muscle actions or accentuated eccentric loading for the knee flexors (and possibly the knee extensors) should lead to superior gains in sprinting performance compared to strength training with similar absolute load in eccentric and concentric phases.
Some studies have indicated that electroencephalography (EEG)- derived movement - related cortical potentials (MRCPs) are greater
during eccentric muscle actions than in concentric contractions (Fang et al. 2001; 2004).
Electromyography has limitations, but a consistent finding is that EMG amplitudes are typically lower during
eccentric muscle actions than in concentric muscle actions (Douglas et al. 2016b).
Eccentric muscle actions cause ultrastructural changes in human subjects (J Appl Physiol 2009 a, b).
An eccentric muscle contraction is generated when the fibers of the given muscle lengthen as they lower a load, which is often referred to as the down phase of the movement.
Plyometrics work to develop a stronger and faster muscle contraction, through using
an eccentric muscle contraction, immediately followed by a concentric contraction.
They also state that the goal of plyometric training should be to decrease the time needed between
the eccentric muscle contraction and the «initiation of the overcoming concentric contraction.»
«
Eccentric muscle contraction is more likely to be the culprit because it places a higher load on your muscles.»
The reason that
eccentric muscle contraction (think lowering a dumbbell back down in a biceps curl) is more likely to be the culprit is because it places a higher load on your muscles compared to concentric contraction.
This suggests that
eccentric muscle actions are much harder to control, and that eccentric training could bring about quick improvements in motor learning for such movements, which might then produce large gains in eccentric - specific strength.
Eccentric Muscle Action — The muscle lengthens as it resists weight.
Sprint sports such as soccer, rugby, and lacrosse require a high volume of energy turnover and
eccentric muscle actions resulting in metabolic and mechanically induced stress.
The researchers also tested
the eccentric muscle endurance of the knee and hip flexors and extensors of all their subjects, then looked for correlations with the running economy results.
In contrast, they reported greater triceps brachii muscle activity in
the eccentric muscle action of unsuccessful lifts compared with successful attempts.
Most bodybuilders and strength athletes understand the benefits of concentric and
eccentric muscle contraction in their training but so many neglect isometrics.
Assessing the effect of bench press muscle action and region, Newton et al. (1997) found that a greater concentric average velocity was achieved at all loads between 15 — 90 % of 1RM during the bench press throw when preceded by
the eccentric muscle action compared to the concentric - only muscle action.
It therefore showed that the aspects of an exercise that determine transfer to sport are not limited to the movement pattern, but include other factors such as the muscle group being trained (the hamstrings are key to sprinting ability), and the mode of the contraction (
eccentric muscle actions are very important during sprinting).
When you train using only concentric and
eccentric muscle contractions without out pausing at the end range of a movement (exercise) when the desired muscle is fully contracted, your joints don't get strong and stable at the end range of motion.
The researchers suggested that these findings imply that hip flexor length affects gluteus maximus and hamstrings EMG amplitudes during squatting motions, at least during
eccentric muscle actions.
Phrases with «eccentric muscle»