Although possible in insolated muscle preparations , eccentric contractions
are difficult to elicit and control through stimulation in clinical situations .
Research has shown that after severe eccentric contractions
that are followed by muscle soreness, muscle fibrils, connective tissues around fibers, the plasma membrane of muscle fibrils, sarcomeres, sarcoplasmic reticulum, or a combination of these parts are damaged, leading to special biochemical and functional symptoms in the individual .
Rupture of the distal biceps tendon is a relatively rare injury that occurs when there is an unexpected, forceful eccentric contraction
of the biceps muscle.
As an example, for eccentric contraction
of the hamstrings, have the patient flex the knee approximately 90 [degrees].
Predominantly concentric contractions (running uphill), seem to be the most efficient way of increasing the HSP70 concentrations in the different tissues, followed by eccentric contraction
(downhill) and lastly the concentric-eccentric cycle (horizontal).
HTS seems to take advantage of both resistance exercise (anaerobic exercise) by electrical eccentric contractions
and aerobic exercise at a low exercise intensity by voluntary concentric contractions.
For the break test, the examiner applies resistance sufficient to overcome the maximum effort of the person being tested and cause the subject's joint to move in the opposite direction, which results in an eccentric contraction
, in which your muscles lengthen under loading, usually precedes a maximal effort, as when you cock a baseball bat the second before hitting the ball.
Our general guideline for movement speed stipulates a 1-2 second concentric contraction and a 3-4 second eccentric contraction
They continue to make the same mistakes in the weight room, such as poor form, using too much weight, exercising too frequently, neglecting certain vital body parts, and - perhaps the greatest mistake of all - failing to emphasize eccentric contraction
The major muscular contraction involved in active stretches is the eccentric contraction
Research interest Neuromuscular electrical stimulation, low back pain, eccentric contraction
, muscle function