Background: Gestational diabetes mellitus (GDM) associated with short and long-term complications for mother and her baby. Physical activity interventions may help with glycemic control and improve maternal and infant outcomes. Aim: To evaluate the effect of prearranged physical activity on maternal and fetal outcomes for women with gestational diabetes mellitus.

Methods: Quazi experimental design was conducted at antenatal outpatient clinic of Women Health Hospital, Egypt. The study participants involved a purposive sample of 100 pregnant women who newly diagnosed with GDM in her current pregnancy. Three tools were used to collect the data: Structured interview questionnaire that included three parts, maternal &neonatal follow-up and Global Physical Activity Questionnaire (GPAQ) tool. Results: Caesarean section was significant higher (62.0%) among studied women in control group compared to 28.0% in study group, P- value 0.001. Also 96.0% in study group weren't experienced any complication during birth process, compared to 18.0% in control group were experienced diabetic coma during birth process, P- value 0.001. Newborns with macrosomia were (0.00%) in study group, compared to 22.0% in control group, Also there was a highly statistically significant difference between Apgar scores after five minute in the study and control groups (P- value= 0.001). Moreover, 4.0% of newborns in study group suffering from breathing problems compared to 16.0% in control group with statistically significant difference P- value 0.005. Conclusion: For gestational diabetic women, scheduled physical activity was effectively on improving maternal and neonatal outcomes. Recommendation: planned physical activity should be encouraged to be a basic part of antenatal care for gestational diabetic women.