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IINNEERRVVAA
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CCOOPPYYRRIIGGHHTT®®
Why does knee extensor muscles torque
decrease after eccentric-type exercise?
Aim.
The purpose of this study was to re-examine central and
peripheral origins of neuromuscular fatigue after a...
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MM
IINNEERRVVAA
MM
EEDDIICCAA
CCOOPPYYRRIIGGHHTT®®
Why does knee extensor muscles torque
decrease after eccentric-type exercise?
Aim.
The purpose of this study was to re-examine central and
peripheral origins of neuromuscular fatigue after a highly strenuous eccentric exercise of the knee extensor muscles (KE)
using both voluntary/evoked contractions and electromyographic recordings (EMG).
Methods.
Before, and 30 min after 15 min of intermittent onelegged downhill running, maximal percutaneous electrical stimulations (single twitch, 0.
5 s tetanus at 20 Hz and 80 Hz) were
applied to the femoral nerve of 10 male subjects.
Electrically
evoked superimposed twitches were delivered during isometric maximal voluntary contraction (MVC) to determine maximal voluntary activation (%VA).
Vastus lateralis (VL), vastus
medialis (VM) and biceps femoris (BF) EMG were recorded
during MVC and quantified using the root mean square (RMS)
value.
M-wave characteristics were also
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