ORIGINAL
ARTICLE – abstractEffect
of precooling and prewarming on endurance performance and blood lactate
concentration Perivinkel
Kaur, Sarika, Jaspal Singh Sandhu
Department
of Sports
Medicine & Physiotherapy, Guru Nanak Dev University, Amritsar
State-Punjab, India
Abstract
Objective:
To evaluate and compare the effect of precooling & prewarming
on endurance performance, Vo2max & blood lactate concentration
at an ambient temperature of 30-320C.
Methodology:
15 young healthy
untrained university male subjects were exposed to pre-exercise rest
(control), pre-cooling (160C±20C) & pre-warming
(380C±20C) intervention by full body water immersion method
for 20 minutes, following which VO2max, endurance performance was
determined by Queen’s college step test and treadmill running
at pre determined heart rate (Karvonen’s formula)
respectively. Three minute after point of exhaustion blood samples were
taken for blood lactate analysis, Rate of perceived exertion was
measured by BORG’S scale.
Results:
There was
significant decrease in post blood lactate accumulation after
precooling, when compared with control condition (t=5.04,
p<0.001) and with pre-warming group (t=8.72, p<0.001).
Non–significant differences was noted in pre-warming group on
comparison with control conditions (t=0.96). There was a significant
improvement in VO2max after precooling on comparison with control
conditions (t=6.31, p<0.001) and with prewarming (t=10.37,
p<0.001), prewarming group showed significant decrease on
comparison with control condition (t=6.23, p<0.001). A
significant improvement in the time to exhaustion after pre-cooling on
comparison with control conditions (t=5.72, p<0.001) and there
was a decrease with prewarming (t=5.20, p<0.001) &
significant improvement in the distance traveled after precooling on
comparison with control condition (t=6.33, p<0.001) and a
decrease with prewarming (t=7.14, p<0.001) was noted.
Conclusion:
Precooling decreases post exercise blood lactate
accumulation, improves VO2max and endurance performance, and
prewarming is not effective for endurance performance, have a negative
effect on VO2max and also it is not effective in reducing post blood
lactate accumulation.
Key
words:Precooling,
prewarming, blood lactate, endurance performance & VO2max.
|
