Objective: To compare the magnitudes of change in heart rate(HR), systolic blood pressure(SBP), diastolic blood pressure(DBP), arterial oxygen saturation(SpO2),rate pressure product(RPP) and rate of perceived exertion(RPE) during straight partial sit-ups and oblique partial sit-ups Design: Randomized controlled parallel design. Participants: Thirty male volunteers with mean age 23.7±1.9 years, height 5.5± 0.2 meters, weight 59.2+5.7 kg and BMI of 21.4 ± 2.1were included in the study. Methods: 30 male healthy volunteers were randomly assigned to two groups and they performed 30 repetitions of SPU and OPSU depending upon the group they were allocated to. After recording there baseline HR, BP, SpO2 for one minute same were recorded during and post exercise for 10 minutes with the help of monitors attached with a BP cuff and pulse oxymeter. Result: Data was analysed using SPSS 14.0 for window version. t-test was used to compare the pre-exercise, during-exercise and post-exercise effects on hemodynamic variables between SPSU and OPSU. Within group comparison was done using ANOVA. The level of significance was set at p< 0.05. Mean difference of pre and post exercise hemodynamic variables were compared and no significant difference was found between the two exercises at during exercise and post exercise levels However, within group analysis, a significant difference at pre exercise, during exercise and post exercise levels in each hemodynamic variables in both the abdominal exercises were found. Conclusion: The results suggest that there was no significant difference in rise in hemodynamic variables during the two exercises. However there was a significant difference between pre exercise and during exercise magnitude of hemodynamic variables of each exercise. This suggests that acute hemodynamic changes of these two abdominal exercises are clinically relevant, however both oblique partial sit-ups and straight partial sit-ups warrant same amount of concern.

Keywords: Hemodynamics, abdominal exercises, rehabilitation, blood pressure, rate pressure product