Introduction: Resistance exercises are strongly recommended for implantation in primary and secondary cardiovascular disease prevention programs. Also, resistance exercise applied with conventional cardiac rehabilitation protocols in CABG patients is recommended to increase in the functional capacity. The purpose of this study was to compare effect of concentric resistive and eccentric resistive exercises on cardiovascular variables in CABG patients.
Methods: A sample of n=20 CABG subjects between age group 55-65 years was selected for study. Patients on the day of discharge and one day before discharge were selected. Patients with unstable cardiovascular variables, musculoskeletal condition of upper limb and patients with neurological, respiratory disorders were excluded. Each subject performed concentric resistive exercises of biceps at 60% of 1 RM intensity till voluntary fatigue on day 1. On day 2, subject performed eccentric resistive exercises of opposite biceps at 60%+30% of 1 RM of concentric intensity with same number of repetitions as of concentric. Pre and post HR, BP and SpO2 were measured.
Results: Statistical analysis was done using one-way anova test. The results shows that mean post HR after concentric exercise (87.6) was significantly higher than mean post HR after eccentric exercise (79.5) (p<0.001). Mean post SBP after concentric exercise (140.7) was significantly higher than mean post SBP after eccentric exercise (128.65) (p<0.001). Mean post DBP after concentric exercise (86.7) was higher than mean post DBP after eccentric exercise (82.3). Mean post SpO2 after concentric exercise (88.4) was significantly lower than mean post SpO2 after eccentric exercise (91.85) (p=0.003). Conclusion: The eccentric resistive exercise imposes less stress on cardiovascular system as compared to the concentric resistive exercise in CABG patients. Hence, it is concluded that eccentric resistive exercises are recommended more than concentric resistive exercises in CABG patients.