the general warm - up has a potentially positive effect on short - term performance1 .
this may be because of reduction in joint 
 stiffness2 , increased 
 neurotransmission3 , and differences in 
 the relationship between power and acceleration4 .
in addition , disruption of stable links between actin and myosin 
 after warm - up may decrease muscle stiffness and affect short - term performance5 .
in - depth investigation of the effects of a 
 general warm - up on respiratory muscle activity has recently been performed , and the 
 therapeutic and benefical effects were noted by the researchers6 .
accordingly , we hypothesized that respiratory muscle 
 warm - up may positively affect anaerobic power , and investigated this hypothesis in the 
 present study .
, they were familiarized with the maximal inspiratory pressure ( mip ) , 
 wingate anaerobic tests , and respiratory warm - up . during their second and third visits , a 
 wingate anaerobic power test with general warm - up as the control trial ( can ) and 

a wingate anaerobic power test with general and respiratory warm - up as the experimental 
 trial ( ean ) , were randomly performed .
the trials were applied at the same time 
 each day ( between 16:00 and 20:00 h ) .
a total of 30 field hockey players ( age , 20.5  2.0  years ; 
 height , 179.3  6.9  cm ; weight , 73.7  12.7  kg ) voluntarily participated in the present 
 study .
approval was 
 obtained from ondokuz mayis university clinical research ethical committee ( om kaek 
 2014/635 ) . for the general warm - up ,
low - intensity aerobic running for 10  min and dynamic 
 stretching for 5  min were performed by the subjects .
for respiratory warm - up , an inspiratory 
 muscle training device ( powerbreathe classic , imt technologies ltd
two sets of 30 inspirations were performed at an intensity of 40% of mip with 
 a 2-min rest between each set7 .
mip was 
 measured with a respiratory pressure meter8 ( microrpm , carefusion micro medical , kent , uk ) .
anaerobic power 
 testing was performed with a cycle ergometer ( 894e peak bike , monark exercise ab , vansbro , 
 sweden ) .
data analysis was performed using a statistical program ( spss for 
 windows , version 16.0 , 2008 , spss inc . ,
significant changes in peak power ( can=767.0  162.9  w , ean=835.1  
 175.1  w , percent difference=8.9% ) , relative peak power ( can=10.4  1.4  w / kg , 
 ean=11.4  2.0 
w / kg , percent difference=9.6% ) , and time to peak 
 ( can=3.9  1.7  s , ean=2.8  1.4  s , percent difference= 28.8% ) were 
 observed between the can and ean trials .
previous studies showed that general warm - up may positively affect anaerobic power and 
 performance1,2,3,4,5 .
however , respiratory 
 warm - up may affect short - term performance in a different way .
in particular , when considered 
 as part of an anaerobic energy system , respiratory warm - up may not have an impact at a 
 physiologic level .
an increase may occur with rising core temperature induced by respiratory 
 warm - up .
previous research examined the effects of respiratory warm - up on 100-m swimming 
 performance in 15 subjects .
, investigated respiratory warm - up and rowing performance in seven male and seven female 
 rowers , and found higher power output during a rowing test after respiratory warm - up7 .
studied intermittent sprint 
 performance , and showed that respiratory warm - up resulted in higher power output values than 
 a general warm - up11 . in conclusion , 

anaerobic power ( peak power ) significantly improved after respiratory warm - up , and peaked 
 faster .
 [ purpose ] the aim of the present study was to examine the effects of respiratory muscle 
 warm - up on anaerobic power . [ subjects and methods ] thirty male field hockey players ( age , 
 20.5  2.0  years ) each participated in a control ( can ) trial and an 
 experimental ( ean ) trial . 
 the ean trial involved respiratory muscle 
 warm - up , while the can trial did not . 
 anaerobic power was measured using the 
 wingate protocol . 
 paired sample t - tests were used to compare the ean and 
 can trials . 
 [ results ] there were significant increases in peak power and 
 relative peak power , and decreases in the time to peak after the ean trial by 
 8.9% , 9.6% , and 28.8% respectively . 
 [ conclusion ] respiratory muscle warm - up may positively 
 affect anaerobic power due to faster attainment of peak power . 
INTRODUCTION
SUBJECTS AND METHODS
RESULTS
DISCUSSION