Fontan Fitness Trial

NCT ID: NCT06918795

Last Updated: 2025-06-11

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

200 participants

Study Classification

INTERVENTIONAL

Study Start Date

2025-06-09

Study Completion Date

2029-04-30

Brief Summary

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The goal of this randomized control trial is to learn about physical fitness and exercise habits in children aged 10-17 with the Fontan Circulation through a home-based, digital exercise intervention. The main questions it aims to answer are:

* Does a home-based, digital intervention increase physical activity (PA) in youth with the FC compared to enhanced usual care?
* Does a home-based, digital intervention increase physical fitness in youth with the FC compared to enhanced usual care?
* Do multi-level factors (medical, neurodevelopmental, sociodemographic, neighborhood) impact the effectiveness of the digital intervention?

Researchers will compare participants in the enhanced usual care arm to those in the exercise intervention arm to see if the digital intervention is effective.

All participants will wear a PA tracker for 12 months and complete testing at baseline, 6 months, and 12 months.

In addition, participants in the exercise intervention arm will complete a 6-month exercise intervention with the following components:

* aerobic exercise
* resistance exercise
* engagement strategies

Detailed Description

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The Fontan Circulation is associated with poor exercise performance and reduced quality of life. Current standard of care encourages physical activity (PA) in this population, but few structured interventions exist. Participants will be randomly assigned to either enhanced usual care (PA tracker and standard encouragement) or an interactive digital intervention that includes personalized aerobic and resistance exercises with behavioral engagement strategies. This study will evaluate a home-based, digital intervention delivered through a mobile health platform to promote PA and improve fitness among youth with FC.

The study will recruit up to 200 participants aged 10-17 years with FC. After initial testing and a two-week run-in period, 120 participants with peak VO2 between 45% and 80% of predicted norms will be randomized. The intervention will last 6 months, followed by a 5.5-month monitoring phase. Outcomes will include changes in PA (measured via accelerometry), peak VO2, muscle strength, body composition, and quality of life.

Conditions

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Single-ventricle Congenital Heart Disease

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

DOUBLE

Investigators Outcome Assessors

Study Groups

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Digital Exercise Intervention

The exercise intervention arm includes access to a digital application to receive the following over the 6-month intervention:

* personalized plans for aerobic-based PA
* personalized resistance exercise sessions
* engagement strategies.

Group Type EXPERIMENTAL

Digital Exercise Intervention

Intervention Type BEHAVIORAL

Subjects randomized to the intervention arm will receive the same as the enhanced usual care arm but will be additionally exposed to: (1) personalized plans for aerobic-based PA, (2) personalized resistance exercise sessions, and (3) financial and non-financial engagement strategies. These intervention components will be delivered continuously using an advanced digital health informatics platform during the 6 months of the intervention. The intervention will be overseen and supplemented by the exercise physiologist, who will meet with participants on a weekly, then biweekly and finally monthly basis over 6 months.

Enhanced Usual Care

The enhanced usual care arm will receive their usual care in addition to a passive physical activity tracker device. No intervention materials will be delivered to these participants over the course of their enrollment in the study.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Digital Exercise Intervention

Subjects randomized to the intervention arm will receive the same as the enhanced usual care arm but will be additionally exposed to: (1) personalized plans for aerobic-based PA, (2) personalized resistance exercise sessions, and (3) financial and non-financial engagement strategies. These intervention components will be delivered continuously using an advanced digital health informatics platform during the 6 months of the intervention. The intervention will be overseen and supplemented by the exercise physiologist, who will meet with participants on a weekly, then biweekly and finally monthly basis over 6 months.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Fontan Circulation present
* Girls ≥11 years of age or menstruating must have negative urine pregnancy test
* Neurodevelopmental capacity to complete all study procedures
* Physical capacity to complete all study procedures
* English speaking with at least one English speaking parent/guardian
* To enroll in the randomized control trial, percent predicted peak VO2 \<80% of age-sex matched normal controls on the baseline exercise stress test (EST)

Exclusion Criteria

* Inability to complete an EST at any time (i.e. limited physical or executive function)
* Uncontrolled lymphatic disorders
* Exercise induced or uncontrolled arrhythmias
* Pacemaker or internal cardiac defibrillator (ICD)
* Peak VO2 \<45% age-sex predicted
* Having had or under consideration for a heart transplant
* Pregnant or lactating females
* Parents/guardians or subjects who, in the opinion of the investigator, may be non-compliant with study schedules or procedures
Minimum Eligible Age

10 Years

Maximum Eligible Age

17 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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National Heart, Lung, and Blood Institute (NHLBI)

NIH

Sponsor Role collaborator

University of Pennsylvania

OTHER

Sponsor Role collaborator

Children's Hospital of Philadelphia

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Elizabeth Goldmuntz, MD

Role: PRINCIPAL_INVESTIGATOR

Children's Hospital of Philadelphia

Locations

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Children's Hospital of Philadelphia

Philadelphia, Pennsylvania, United States

Site Status RECRUITING

Countries

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United States

Central Contacts

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Elizabeth Goldmuntz, MD

Role: CONTACT

215-590-3354

Zoe Lincoln, MS

Role: CONTACT

Facility Contacts

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Elizabeth Goldmuntz, MD

Role: primary

Zoe Lincoln, MS

Role: backup

Other Identifiers

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1R61HL171110-01A1

Identifier Type: NIH

Identifier Source: secondary_id

View Link

24-022619

Identifier Type: -

Identifier Source: org_study_id

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