Comparing the effect of aerobic continuous and interval training and detraining on cardiac hypertrophy and atrophy

ABSTRACT

Purpose: The purpose of this study was to compare the effect of aerobic continuous and interval training and
detraining  on  myocardial  adaptations.  Methods:  Twenty  male  none-  athlete  students  were  volunteered  and
divided randomly into aerobic continuous (n= 10) and aerobic interval group (n=10). Subjects participated in
an  8-week  running  program  (3  day/week,  at  70%  HR max ).  Continuous  group  ran  continuously  45  min  and
interval group ran five nine- min periods with a four– min inactive rest between the work periods. After 8-week
of training, subjects completed 4-week detraining. Paired sample t-test was used for analyzing data. Results:
Using echocardiography, no significant difference was found in EDD, ESD, %FS, %EF, PWT, LA, AO, HR,
SBP  and  DBP  after  8-week  continuous  and  interval  training  compared  to  before  training  (P>0.05),  but  a
significant difference  was found  in IVS  (p<0.05). No  significant difference  was found  in EDD,  ESD,  %FS,
%EF, PWT, LA, AO, HR, SBP and DBP after 4-week detraining compared to 8-week continuous and interval
training (P>0.05), but a significant difference was found in IVS (p<0.05). Conclusion: Aerobic continuous and
interval training and detraining can affect on myocardial adaptations equally.