Exploring the Impact of Swimming on Body Mass Index and Body Fat in Individuals with Down Syndrome: A Meta-Analysis

The aim of this study is to assess the effectiveness of swimming training in reducing body mass index (BMI) and body fat percentage among individuals with Down syndrome (DS), utilizing a meta-analysis approach. We conducted a systematic search for studies examining the clinical impact of swimming training on individuals with DS. Inclusion criteria encompassed studies involving DS patients who underwent swimming training for a minimum duration of 4 weeks. The primary focus was to compare changes in BMI and body fat percentage from baseline to post-training. Our analysis incorporated four studies comprising a total of 48 participants. The results demonstrated that swimming training lasting from 8 to 36 weeks did not significantly decrease BMI among DS patients, with a weighted mean difference (WMD) post-training of −0.428 (95% confidence interval (CI): −1.721–0.865) and an I2 of 0%. Subgroup analysis based on age or duration (≥33 weeks or 8 weeks) also showed no notable decrease in BMI. Conversely, the analysis of body fat percentage demonstrated a significant decrease, with a WMD of −2.946 (95% CI: −5.056–−0.837). Subgroup analysis indicated a consistent reduction in body fat percentage across all duration groups. Swimming training does not lead to a significant reduction in BMI among individuals with DS. This outcome may be attributed to concurrent muscle gain alongside decreased body fat, resulting in a notable decrease in body fat percentage.