Optimization of infant weight gain through baby spa

Background: Weight gain is an important indicator in assessing infant health and development. Globally, underweight affects 23.6 million children (WHO, 2022), and in Indonesia, its prevalence increased from 17% in 2021 to 17.1% in 2022. In East Java, the underweight rate reached 15%, while in Sidoarjo Regency it was even higher at 17.8% (MOH, 2022). One stimulation method believed to support weight gain is baby spa, which includes baby massage, baby gym, and baby swim. These activities help improve appetite, sleep quality, and motor development. Griya Husada was chosen as the research site due to its active baby spa services, complete infant growth data, and high patient volume. Objective: This study aims to analyze the relationship between baby spa and weight gain in infants aged 6–7 months at Griya Husada Sidoarjo. Methods: This was an analytical observational study with a cross-sectional approach. The sample consisted of 74 infants aged 6–7 months who received baby spa services from January 17 to February 18, 2025. Consecutive sampling was used. Data were collected through medical records, questionnaires, and weight measurements using baby scales. Data were analyzed using univariate and bivariate methods with the Chi-square test. Baby spa was the independent variable, while infant weight gain was the dependent variable. Results: A total of 100% of infants who received baby spa at least once per month for three consecutive months experienced weight gain. Only 45% of those who underwent baby spa inconsistently and 12.5% of those who did not participate in baby spa experienced weight gain. Statistical analysis showed a significant relationship between baby spa and weight gain (p < 0.001). Conclusion: Baby spa is associated with weight gain in infants aged 6–7 months. Further research is needed by controlling for external variables such as feeding patterns, health status, and socioeconomic factors.