NIH-funded research R01 grant

Lower leg heat therapy to protect pregnant women with obesity

Official title: Vascular and neural mechanisms of chronic lower leg heating in pregnant women with obesity

Funded at Ut Southwestern Medical Center · NIH-11325407 · Data updated 2026-11-12

A study will test whether repeatedly warming the lower legs can improve blood vessel function and lower blood pressure in pregnant women who are obese.

More Obesity research and trials

Quick facts

Grant typeR01 grant
Study typeNIH-funded research
Funding institutionUt Southwestern Medical Center
NIH-funded
Lab location1 site (Dallas, United States)
Project startMay 1, 2025
Project endApril 30, 2030
Funding year2026
Award (this year)$644,387
NIH project number5R01HL172349-02
Project IDNIH-11325407 on NIH RePORTER

Who could benefit from this research

Could help

Pregnant individuals with obesity between 12–14 weeks of gestation who are able to participate in the heat-exposure protocol.

Less likely to help

Patients without obesity or later-stage pregnancy may not benefit from this specific intervention.

What this research studies

This project will enroll 118 pregnant women with obesity in their first trimester and randomly assign them to either a lower-leg heating intervention or usual care. The researchers will examine how the treatment affects blood vessel health, nitric oxide pathways, and sympathetic nervous system activity, aiming to reduce the risk of hypertensive disorders during pregnancy. Over the course of the study, participants will undergo controlled heat exposure to the lower legs and be monitored for vascular responses and blood pressure changes. The goal is to see if a simple, non-drug approach can improve cardiovascular function and potentially improve pregnancy outcomes.

Why it matters

Potential benefit: If successful, this approach could help lower the risk of hypertension-related pregnancy complications in obese women.

How similar studies have gone: Prior work in non-pregnant populations showed improvements in vascular function with whole-body heating, but this study tests lower-leg heating in pregnant women with obesity.

Where this research is happening

  • Ut Southwestern Medical Center
    Dallas, United States
    Active

Researchers

  • Principal investigator: Fu, Qi — Ut Southwestern Medical Center
  • Study coordinator: Fu, Qi

Related research

Other NIH-funded projects on the same topics.

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.