Eccentric here:
http://en.wikipedia.org/wiki/Eccentric_training
concentric here:
http://en.wikipedia.org/wiki/Concentric_exercise#Concentric_contraction
http://nnr.sagepub.com/content/27/4/335.abstract?etoc
Abstract
Background. Impaired voluntary neuromuscular activation of agonist muscles is a primary determinant of weakness and motor dysfunction
following stroke. Objective. To determine whether eccentric resistance training (ECC) resistance training is superior to concentric resistance training
(CON) resistance training to enhance neuromuscular activation, strength, and walking speed after stroke. Methods.
A total of 34 adults poststroke participated in a staged intervention
comprising (1) either CON-only or ECC-only resistance
training of the paretic leg followed by (2) gait
training. Changes in voluntary neuromuscular activation and power were
assessed
for both the trained paretic and untrained
nonparetic legs. Self-selected and fast walking speeds were also
assessed. Results. In response to resistance training, the ECC group experienced larger improvements in neuromuscular activation of paretic
leg muscles, rectus femoris and vastus medialis (P < .005), and the largest gains in paretic leg power (+74% for ECC contractions, P < .0001). ECC also had greater cross-education of increased power to the untrained nonparetic leg (12%-14%, P
= .006). Over the course of gait training, much of the gain in paretic
leg activation in the ECC group was lost, such that
the net change in agonist activation was comparable
between the CON and ECC groups when the full intervention was
completed.
Nevertheless, improvement in walking speed
postintervention was more prevalent in the ECC than CON group. Conclusion.
ECC resistance training was more effective for improving bilateral
neuromuscular activation, strength, and walking speed
following stroke. Future research should assess
whether a longer duration ECC training program can provide further
benefit.
No comments:
Post a Comment