The investigators conducted the study at Ankara Medipol University, Faculty of Health Sciences, Department of Physical Therapy and Rehabilitation. This study was conducted by the principles set out in the Declaration of Helsinki. Fifty postpartum women aged 25-38 will be included in the study.

* Procedures The investigators assessed the participants by an experienced physiotherapist, who was blind to the randomization, at the start of the study and after the 8-week training. The group on which they depended was not disclosed to the participants until the end of the baseline evaluation. The investigators used a computer program for randomization and randomly placed individuals who completed the initial assessment into the pilates group (PG) or control group (CG). The investigators performed the Pilates exercises under the supervision of a certified physiotherapist with ten years of experience. The investigators asked the individuals not to inform the evaluator of their involvement in the training during the last evaluation. Before the study, the investigators explained the purpose and content of the survey to the participants and obtained written informed consent from all pregnant women to participate in the study.

Pilates training was done by an Australian Pilates and Physiotherapy Institute certified and experienced Ph.D. Physiotherapist Halil Ibrahim Bulguroglu lasted eight weeks, two days a week for one h. The investigators divided the individuals in the Pilates exercise group into two smaller groups of 12 or 13 to verify whether they correctly did the exercises. In this study, the investigators organized a program to include 15 min of warm-up, 30 min of Pilates exercises, and 15 min of cooling and stretching exercises. The exercises were done in 10 repetitions. The exercise program recommended by the Australian Pilates and Physiotherapy Institute during postpartum was used in training. During the Pilates exercises, investigators described the activities with different visual simulation techniques, and exercises were done together with Pilates breathing. The intensity of the exercises was increased by using different positions and elastic bands. The resistance was increased by starting with the red Therabant and switching to the blue band after two weeks. If the new resistance amount was challenging for the patient, the exercises were continued with the same color band for one more week. Stretching exercises and posture exercises were used during the cooling period. The subjects in the online pilates group were informed about side effects such as shortness of breath, dizziness, headache, muscle pain, and weakness. They were asked to stop exercising when there were any side effects.

-Statistical analysis The investigators will perform statistical analysis using SPSS software, version 21 (SPSS Inc. Chicago, IL, USA). The normal distribution of variables will be determined using histograms, probability plots, and a Shapiro-Wilk test. Because of an abnormal distribution, median and interquartile range (IQR) were used for descriptive statistics. Numerical variables showing normal distribution were shown as mean±standard deviation. The investigators will use a Mann-Whitney U test to compare baseline and change values between groups. The investigators will use Wilcoxon Test to compare baseline values within the group and values after eight weeks. The significance level will be set at p \< 0.05 for all analyses.