We have previously introduced an orthotic device that provides variable stiffness at the knee joint to overcome the challenges of controlling eccentric contractions
with stimulation .
Therefore, it can be concluded that caffeine consumption has a significant effect on changes in serum creatine kinase after eccentric contractions
Maybe the eccentric contractions
could stimulate the HSP70 response by mechanisms dependent on muscle damage, which are greater in this type of exercise and are modulated by an increase in inflammation markers (Lavie et al.
require unique activation strategies by the nervous system.
They concluded that when the break test is performed, the velocity applied through the lever arm to "break" the force and initiate an eccentric contraction
could lead to variable strength measurements.
In effective plyometric training, an eccentric contraction
is followed immediately by a concentric contraction to produce a powerful force.
We also recommend a brief pause (1 second) at the mid-range position, which enables a smooth transition between the concentric and eccentric contractions
Every lift consists of a concentric contraction and an eccentric contraction
Eccentric Movement--In an eccentric contraction
the muscle lengthens and develops tension to guide the movement and to stop it.
It has also been documented that hamstrings are more responsive than knee extensors to the damaging effects of an exercise bout composed of maximal voluntary eccentric contractions
(Croisier at al.
Training consisted of lowering the load in a controlled way from full knee extension to approximately 90[degrees] knee flexion, performing an eccentric contraction
of two seconds.
Furthermore, there is a short period of eccentric contraction
in the initial phase of concentric exercise (Jonsson and Alfredson, 2005).
In previous studies, muscle damage following intensive resistant exercise has been attributed to the mechanical stress on the contractile apparatus during eccentric contraction
(Moritani et al.
However, no significant difference was observed in the percent change from baseline in maximal eccentric contraction
between the groups (RT-WBV, +13.
Sufficient eccentric contraction
of the quadriceps in the stepping leg would be required to descend the body.