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Background: Previous study has evaluated the impact of breathing in relation to abdominal exercises in young and healthy males. Thus, the aim of this study is to evaluate whether, as compared with a training protocol of common core exercises, these exercises plus breathing exercises particularly diaphragmatic breathing would more greatly enhance abdominal fitness, and respiratory function in young healthy females. Materials and Methods: A total of 30 young healthy females were screened for the study as per the inclusion and exclusion criteria. The subjects were conveniently divided into 3 group. Each group comprised of 10 subjects each. Experimental Group 1 (EG1) performed core exercises with diaphragmatic breathing, Experimental Group 2 (EG2) performed only core exercises and Control Group (CG) was not given any kind of exercises during 6 weeks. Pre and post data was collected in terms of Pulmonary Function Test (PFT) and ACSM curl-up (cadence) test after 6 weeks in all the three group. Results were tested for normal distribution using a Shapiro-Wilk test. One-way ANOVA tests were used to measure differences in PFT variables, ACSM curl-up test scores, between groups. A dependent-measure t-test was used to determine pre- and post-test differences within the groups. Confidence interval was set at 95% and any value <0.05 was considered as significant and <0.001 as highly significant. Results: Significant changes in ACSM curl-up test scores, and all pulmonary parameters were recorded in the experimental groups: EG1 and EG2 at the post-training assessment, whereas in the control group, no significant differences over baseline were observed in any parameters. Conclusion: Core exercises with diaphragmatic breathing is more effective in improving pulmonary function and abdominal endurance in young healthy females.