RESEARCH SUMMARY

Prenatal exercise may lower gestational diabetes risk, but not pregnancy weight gain

Low confidence
Some Concerns bias
Last updated May 6, 2026

Key takeaway:

In overweight or obese pregnant women, supervised exercise did not reduce gestational weight gain, but it may have lowered gestational diabetes incidence and late-pregnancy systolic blood pressure.

Study at a glance

Study type

RCTs

duration

Medium-Term (3–12 mo)

Intervention

Exercise therapy

Outcomes

Pregnancy weight gain, Gestational diabetes mellitus incidence, Systolic blood pressure, Diastolic blood pressure

Funding

Non-industry sponsored

What was studied

Supervised prenatal endurance and strength exercise in pregnant women with overweight or obesity

What they found

  • Gestational weight gain ↔ no clear difference between groups
  • Gestational diabetes incidence ↓ in the exercise group
  • Systolic blood pressure ↓ in late pregnancy with exercise

mainEffects

Gestational weight gain ↔ no clear difference between groups

Gestational diabetes incidence ↓ in the exercise group

Systolic blood pressure ↓ in late pregnancy with exercise

Evidence Suggest

  • The main endpoint, gestational weight gain, was similar in the exercise and control groups.
  • Gestational diabetes was reported less often in the exercise group than in standard care.
  • Late-pregnancy systolic blood pressure was lower in women assigned to exercise training.

Who this applies to

This study applies most directly to pregnant women with prepregnancy overweight or obesity receiving routine maternity care. It is most relevant to women starting pregnancy without known gestational diabetes but at elevated metabolic risk.

Keep in Mind

The strongest conclusion from this trial is that supervised exercise did not clearly reduce gestational weight gain. The more encouraging findings involved secondary outcomes, especially gestational diabetes incidence and systolic blood pressure. Because the trial was smaller than planned and adherence was only moderate, those benefits may be real but remain less certain than they would be in a larger, better-powered study.

Between the Lines

  • The study recruited fewer women than planned.
  • Adherence to the exercise program was modest.
  • Positive findings were mainly in secondary outcomes.
  • The exercise intervention could not be blinded.

Unlock Full Analysis

Create a free account to unlock the bias score, detailed effectiveness analysis, and clinical outcomes for this study.

Already have an account?

Sources

guidelines

ADA Standards of Care - Gestational Diabetes Management 2024

This guideline outlines current care standards for gestational diabetes, including screening, diagnosis, and treatment principles. It helps place this trial's possible effect on gestational diabetes incidence into current diabetes-related pregnancy care.
guidelines

Physical Activity/Exercise and Diabetes: A Position Statement of the American Diabetes Association

This ADA position statement reviews how exercise affects glucose regulation, insulin sensitivity, and cardiometabolic health. It provides broader clinical context for why structured exercise might influence blood pressure and diabetes-related outcomes during pregnancy.
guidelines

Joslin Diabetes Center: Nutrition and Gestational Diabetes

This institutional resource explains practical gestational diabetes management and risk reduction during pregnancy. It supports patient-facing interpretation of why exercise and other lifestyle steps may matter even when weight gain does not clearly change.
studiesGroup

Mediterranean dietary pattern and gestational diabetes: a systematic review

No ads. No tracking

A clean, privacy-first research experience.

Secure & private

Your data is always protected.

Always up to date

New studies added every day.