In “Nutrition and Exercise Strategies to Prevent Excessive Pregnancy Weight Gain: a Meta-Analysis,” the authors evaluate nutrition-only, exercise-only, and nutrition-plus-exercise interventions for optimizing gestational weight gain. The meta-analysis looked at results from 31 previous studies on interventions for gestational weight gain – the included studies looked at nutrition-only interventions, nutrition plus exercise, and exercise only.
According to the analysis,
“…nutrition-only interventions were more effective at decreasing rates of excessive GWG than exercise or nutrition-plus-exercise interventions. Time and resources are limited for all clinicians and clinics. Therefore, clinicians and clinical programs should focus efforts on nutrition education with health messages targeting increased consumption of fruits and vegetables and decreased consumption of foods with high fat or sugar content to maximize effectiveness.”
You can read the whole publication here.