Recruiting

Sedentary Behavior

Sponsor:

University of Central Florida

Code:

NCT07223112

Conditions

Pregnancy

Sedentary Behavior

Insufficient Physical Activity

Eligibility Criteria

Sex: Female

Age: 18 - 45

Healthy Volunteers: Not accepted

Interventions

Sit Less, Move More (SLMM) for pregnant women

Study Details

Brief summary:

Pregnant women are more sedentary (sit, recline, lie down more) on average than non-pregnant women (more than 12 versus less than 8 waking sedentary hours/day). Sedentary behavior has been related to psychological distress, pregnancy weight gain, impaired sleep and very large size infants, while adequate physical activity has been found to improve mental health, decrease risk of high blood pressure in pregnancy and lower risk of preterm birth infants (less than 37 weeks gestation). Decreased sedentary behavior and increased physical activity may be crucial and neglected lifestyle behavior changes that can be promoted to reduce these and other maternal health and birth outcome problems among pregnant women.

Conditions

Pregnancy

Sedentary Behavior

Insufficient Physical Activity

Study ID

NCT07223112

Start date

Feb 1, 2026

Status verified date

Aug, 2026

Completion date

Aug 31, 2027

Anticipated

Primary completion date

Aug, 2027

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: Female

Age: 18 - 45

Healthy Volunteers: Not accepted

Eligibility Criteria

  • 18 to 45 years old
  • speak English
  • 8 to 15 weeks, 6 days pregnant (gestation)
  • singleton pregnancy (no twins or more)
  • self-report less than 150 minutes/week of moderate-intensity physical activity
  • have or are willing to identify a physical activity partner
  • have a cell phone with the capacity for Fitbit application (app.); secure transmission of Fitbit data; receive coaching text messages or, if not, a computer they can use to synch the fitbit, send data, and receive email messages in lieu of texts.

Exclusion Criteria

• Women with physical activity restrictions (e.g., placenta previa) that prevent them from completing ACOG recommended pregnancy physical activity

Study Design

Enrollment

60 participants

Anticipated

Intervention Model

Single group

Primary purpose

Prevention

Interventions and Outcome Measures

Arms

experimental: Sit Less, Move More (SLMM) program intervention

Health Coaching sessions and text messages; Fitbit sedentary time disruption, monitoring, self-regulation, exercise with a partner most days of the week to ACOG opinion 804 recommended physical activity

Interventions

Sit Less, Move More (SLMM) for pregnant women

Health Coach sessions and SMS texts ramp up to goal ACOG opinion 804 pregnancy physical activity; wearable device activity tracker (Fitbit) for monitoring and self-regulation, exercise with a partner for support and accountability most days of the week.

Primary outcome measure

  • Change from first two weeks (baseline) ActiGraph device measured weekly moderate-intensity physical activity in minutes/week and time spent in sedentary behavior in hours per day [ Time Frame: Intervention begins at 10-15 weeks, 6 days gestation; 18-26 weeks gestation ActiGraph measured weekly PA & ST; 28 -36 weeks gestation ActiGraph measured weekly PA & ST; Fitbit measured weekly PA & daily ST measured 10-14 to 28-36 weeks gestation ]

Central Contacts and Locations

Central contacts

Jean W Davis, PhD,DNP,EdD

1-800-208-4545jean.davis@ucf.edu

Carmen Giurgescu UCF College of Nursing ADR, PhD

800-208-4545carmen.giurgescu@ucf.edu

Locations

Orlando Health

Recruiting

Orlando, Florida, United States, 32806

Contacts

Stanislaw K Miaskowski, M.D.

877-793-0145Stanislaw.Miaskowski@orlandohealth.com

Principal Investigator:

Satnislaw K Miaskowski, M.D.

More Information

Sponsor

University of Central Florida

Last update posted

Aug 25, 2026

Last verified

Aug, 2026

Keywords

  • Sit Less, Move More effectiveness for pregnant women
  • physical activity habit formation
  • sedentary behavior habit reversal
  • sedentary time disruption
  • wearable device
  • nudging
  • health coach
  • social support
  • behavior change

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by University of Central Florida on 2026-08-25.