AUTHOR=Lelard Thierry , Doutrellot Pierre-Louis , Temfemo Abdou , Ahmaidi Said 

TITLE=Electromyographic Pattern during Gait Initiation Differentiates Yoga Practitioners among Physically Active Older Subjects

JOURNAL=Frontiers in Human Neuroscience

VOLUME=11

YEAR=2017

URL=https://www.frontiersin.org/journals/human-neuroscience/articles/10.3389/fnhum.2017.00300

DOI=10.3389/fnhum.2017.00300

ISSN=1662-5161

ABSTRACT=<p>During gait initiation, postural adjustments are needed to deal with balance and movement. With aging, gait initiation changes and reflects functional degradation of frailty individuals. However, physical activities have demonstrated beneficial effects of daily motor tasks. The aim of our study was to compare center of pressure (COP) displacement and ankle muscle co-activation during gait initiation in two physically active groups: a group of walkers (<italic>n</italic> = 12; mean age ± SD 72.6 ± 3.2 years) and a yoga group (<italic>n</italic> = 11; 71.5 ± 3.8 years). COP trajectory and electromyography of leg muscles were recorded simultaneously during five successive trials of gait initiation. Our main finding was that yoga practitioners had slower COP displacements (<italic>p</italic> &lt; 0.01) and lower leg muscles % of coactivation (<italic>p</italic> &lt; 0.01) in comparison with walkers. These parameters which characterized gait initiation control were correlated (<italic>r</italic> = 0.76; <italic>p</italic> &lt; 0.01). Our results emphasize that lengthy ankle muscle co-activation and COP path in gait initiation differentiate yoga practitioners among physically active subjects.</p>