تأثیر هشت هفته تمرین تناوبی با شدت زیاد و تمرین تداومی با شدت متوسط بر ضربان قلب بازیافت دقایق ۲،۱ و۳ و نیمرخ لیپیدی بیماران قلبی پس از عمل پیوند بای پس شریان کرونر

background: high-intensity interval training is a new training method that has been less explored in patients. aim: the purpose of this study was to compare the effect of eight weeks of interval training with continuous training on changes in hrr and lipid profile in cardiac patients post-coronary artery bypass graft. methods: in this clinical study, 30 cardiac patients of tehran heart centerthat hadundergone cabg surgery were randomly divided into two groups, interval and continuous training. the protocols included 4rep × 4 min at 90-95% for interval group, and 60-80 minutes at 70-85% peak hr for continuous group. hrmax, hrr at 1, 2 and 3 min following bruce test was assessed before and after the training program. the collected data were analyzed using spss software version 16 and anova test (p<0.05). results: hrr at 1 & 2 minute was reduced more in both interval and continuous groups than that of before the training program (p<0.05). the hhr reduction at 1&2 minutes was more significant in the interval group than the continuous group after exercise stress test (p<0.05). the changes in hrr at 3 min in both groups were not significant compared to that of before the training program (p=0.1). conclusion: both high-intensity interval training and moderate-intensity continuous training improve hrr and lipid profile in cardiac patients after coronary artery bypass. interval training is more effective on hhr reduction than continuous training.