Physical Activity Clinical Trial
Official title:
Randomized Clinical Study of the Effects of Aerobic Water Exercise on Maternal Cardiovascular Adaptation to Pregnancy
Objective: To assess the relationship between maternal cardiovascular capacity and aerobic water exercise during the gestational periods of hemodynamic overload. Study design: randomized clinical trial, with 41 healthy pregnant women assigned to one of two groups: Control and Water exercise. Maternal cardiovascular capacity (maximum oxygen consumption, cardiac output, stroke volume, heart rate and mean arterial pressure), physical performance (relative HR, treadmill speed and self-perceived exertion) and neonatal outcome (gestational age, weight, Apgar index and length of infant's hospitalization) were assessed. Means were evaluated by dependent and independent t-tests, and proportions by the chi-square method (p<0.05). Results: The control variables showed that the groups were homogeneous. Water exercise was associated with maintenance of VO2max, increase in stroke volume and cardiac output, and better performance on stress tests in the third trimester of gestation. No significant difference in neonatal variables was observed. Conclusion: Water exercise maintained cardiovascular capacity and performance under submaximal stress, and did not affect hemodynamic adaptation to gestation or neonatal outcome.
Status | Completed |
Enrollment | 41 |
Est. completion date | April 2001 |
Est. primary completion date | April 2001 |
Accepts healthy volunteers | Accepts Healthy Volunteers |
Gender | Female |
Age group | 15 Years to 26 Years |
Eligibility |
Inclusion Criteria: - Low-risk (healthy) pregnant women - At 16-20 weeks of gestation - Seen at the Prenatal Care Service for Low-risk Pregnancies of Botucatu Medical School-UNESP Exclusion Criteria: - Twin pregnancy - Clinical or obstetric disorder contraindicating an exercise program - Withdrawal from prenatal care at our service - Loss to follow-up; and failure to attend three (or more) exercise sessions, which was considered non-compliance to the aerobic water exercise program |
Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Open Label, Primary Purpose: Supportive Care
Country | Name | City | State |
---|---|---|---|
Brazil | Department of Gynecology and Obstetrics of Botucatu Medical School - São Paulo State University/UNESP | Botucatu | Sao Paulo |
Lead Sponsor | Collaborator |
---|---|
UPECLIN HC FM Botucatu Unesp | Faculdade de Medicina de Botucatu, UNESP, Botucatu, Brasil, Federal University of São Paulo, Fundação de Amparo à Pesquisa do Estado de São Paulo |
Brazil,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Cardiovascular capacity | Performed during prenatal visits at 16-20, 28-33 and 34-39 weeks. Cardiovascular capacity was evaluated by using a treadmill submaximal stress test, according to the protocol of Balke-Ware & Bruce that requires five minutes on treadmill at fixed incline and constant individualized speed with AP and HR monitoring. | 39 weeks | No |
Secondary | Assessment of physical performance at stress testing; stress perception during testing | Relative HR, treadmill speed and the Borg scale scores, obtained during testing, were used. A specific questionnaire was administered to all subjects in order to quantify stress perception during testing. | 39 weeks | No |
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