Izvorni znanstveni članak
Activation Pattern of Lower Leg Muscles in Running on Asphalt, Gravel and Grass
Aleš Dolenec
; University of Ljubljana, Faculty of Sport, Ljubljana, Slovenia
Igor Štirn
; University of Ljubljana, Faculty of Sport, Ljubljana, Slovenia
Vojko Strojnik
; University of Ljubljana, Faculty of Sport, Ljubljana, Slovenia
Sažetak
Running is performed on different natural surfaces (outdoor) and artifi cial surfaces (indoor). Different surface characteristics
cause modifi cation of the lower leg muscle activation pattern to adopt ankle stiffness to these characteristics.
So the purpose of our investigation was to study changes of lower leg muscles activation pattern in running on different
natural running surfaces. Six male and two female runners participated. The participants ran at a freely chosen velocity
in trials on asphalt while in trials on gravel, and grass surfaces they were attempting to reach similar velocities as in the
trials on asphalt. Muscle activation of the peroneus brevis, tibialis anterior, soleus, and gastrocnemius medialis of the
right leg was recorded. Running on asphalt increased average EMG amplitude of the m. tibialis anterior in the pre-activation
phase and the m. gastrocnemius medialis in the entire contact phase compared to running on grass from 0.222±0.113
V to 0.276±0.136 V and from 0.214±0.084 V to 0.238±0.088 V, respectively. The average EMG of m. peroneus brevis in
pre-activation phase increased from 0.156±0.026 V to 0.184±0.455 V in running on grass in comparison to running on
gravel. Running on different surfaces is connected with different activation patterns of lower leg muscles. Running on
asphalt requires stiff ankle joints, running on gravel requires greater stability in ankle joints, while running on grass is
the least demanding on lower leg muscles.
Ključne riječi
running; biomechanics; EMG; training load; natural surfaces
Hrčak ID:
147630
URI
Datum izdavanja:
14.7.2015.
Posjeta: 1.198 *