Enhanced Working Flow of Whole Body Vibration and its Strength
Whole Body Vibration
(WBV) enhances muscle strength adaptions, reduces calories from the body
through vibration and it is associated with traditional neuromuscular training.
The effects of Whole Body Vibration have potential benefits that are caused by the
transmission of mechanical, sinusoidal vibration throughout the body via feet.
After a session of four
minutes of Whole Body Vibration, the isometric leg extensor strength has been increased
by 3.2 % at the time period of two minutes. If sixty minutes of Whole Body
Vibration session completes, the baseline strength level has been increased and
chronic exposure to Whole Body Vibration has been increased in isometric by
16.6-24.4% and isokinetic knee extensor strength has been improved similar to
those observed after the moderate intensity resistance training programs and
leg extension exercises of the same duration and frequency.
The increased
muscle strength and power after Vibration Training results from increased
neuromuscular activation during WBV which subsequently induces adaptations.
Applying vibration stimulus directly to a muscle stimulates Ia-afferents inducing
a myotatic reflex contraction referred to as the tonic vibration reflex. Measurement
of tonic vibration reflex and neuromuscular activation is complicated by the
common presence of artifacts in EMG data, which result from electrode/cable
motion and nearby electrical noise.
However, if
neuromuscular responses to WBV are modulated by Ia-afferents, then the
magnitude of muscle activation during WBV should be influenced by Ia-afferent sensitivity.
The Changes in relaxed muscle strength alter intra-fusal fiber tension and
Ia-afferent sensitivity, such that the stiffness increases in muscle
lengthening and decreases shortening muscle. The amount of muscle stretch and
the amount of Ia-afferent stimulation, induced during each cycle of vibration
also increase as knee angle.
The hypothesized
changes in muscle length voluntarily induced during dynamic squatting would
alter intrafusal fiber tension and Ia-afferent sensitivity such that responses
to Whole Body Vibration would be greater in magnitude during eccentric
contractions than during isometric and concentric contractions.
