ARTICLE –
abstractChanges
of electromyogram amplitude performing protractile wrist muscle
isometric contraction while increased load is applied Aldona Gružienė1,
Žibuoklė Senikienė1, Marija Ivaškienė2 1Lithuanian
University of Health Sciences Medicine Academy, Kaunas, Lithuania 2
Lithuanian University of Health Sciences Veterinary Academy, Kaunas,
Lithuani
Abstract
Peculiarities
of students' way of life, physical activity, functional and physical
power estimates give ground for establishing health improvement and
physical activity recommendations and health improvement programs. The
research target was to establish integrated bioelectric activity
amplitude variation for different training degree females and males,
performing protractile wrist muscle isometric contraction while
increased load is applied. Sixty students of Lithuanian University of
Health Sciences participated in the research (average age
19.66±0.03 years). The study was conducted in four student
groups: physically active (trained) and physically passive (untrained)
female and male groups. The research showed that after load increase to
females and males who did not train bioelectric activity amplitude
increased more compared to students who did exercise (respectively 1.7
and 2.14 times), as physically passive students muscle strength
increased more due to the effect of nerve mechanism. Physically active
students have a long lasting adaptation and their muscle contraction
strength increased due to muscle factors. In physically passive females
(20%) fatigue was observed when performing isometric contraction with 3
kg weight. Changes in integrated bioelectric activity amplitude showed
that physically active students' muscle function status is better.
Obtained results confirm positive effect of physical activity to all
human body systems and have a general effect on health, which is
important in everyday professional activity.
Key
words:health,
physical activity, isometric contraction, electromyography
|