1. .
Effect of Acute Explosive Fatigue Training on Bio-Electric
Interferential Currents in Male Sprinters
Yajun Tan1, Xingyue Yang1, Jiao Wang1, Yanan Li1, Wanyou
Li11 Wenliang Nie2, Liangchou Zou2, Ruibin Ye1, Benxiang
,
He
1
Depts. of Sport Medicine, Chengdu Sport University, Chengdu, China,
2
Dept. of Sports and Health, Guangzhou Institute of Physical Education,
Guangzhou, China.
Abstract.
Objectives: To study the effect of acute explosive fatigue training on
bio-electric interferential current (a method to assess the
physiological motor and sensory/painful responses to certain
stimulations) in male sprinters.
Methods: Seventeen elite sprinters (aged 18-22) were measured prior
to and immediately after an acute explosive fatigue training session
(lasting for 2 hours plus normal training). They were further
measured at 24, 48 and 84 hours post training. Bio-electric
interferential currents (IC in mA) of the lower legs were assessed at
10 Hz, 50 Hz and 100 Hz frequency by a Frequency Analyzing
Method (FAM) device (Juno Oy, Finland) and the results were
compared to the heart rate (HR) records measured by Smart HR belt
(Suunto Oy) and analyzed by Firstbeat Health software.
Results: ICs increased significantly from 25.5±9.1 to 30.8±6.8
(p<0.05) in sensory response at 10 Hz post fatigue training but
decreased significantly at 24-hr (<0.05) post-training and retained to
pre level thereafter. Motor response trend similar to sensory response
but did not reach significant. The changes of ICs in sensory were
correlated with the changes of the HR from pre to immediately post
training at 10 (r=0.54, p<0.05) and 100 (r=0.65, p<0.05) Hz, while
motor at 50 Hz (r=0.55, p<0.05) and the pain response at 100 Hz
(r=0.58, p<0.05).
Conclusions: The results suggest that FAM is able to distinguish the
fatigue during training and recovery.