Impacto agudo do exercício físico sobre as frequências cardíacas fetal e materna: ensaio clínico randomizado.

Abstract

The exercise has been stimulated during pregnancy in order to reduce undesirable outcomes such as preeclampsia , excessive weight gain and diabetes . Despite widespread among pregnant women and obstetricians , little is known about what happens to the mother / fetus at the time of exercise. This is a randomized , open, held in Campina Grande , in the period July 2011 to July 2012 . Pregnant women with gestational age between 34 and 37 weeks were randomized into two groups of exercise of moderate intensity treadmill and stationary bike . The fetuses and pregnant women were monitored for 60 minutes divided into three 20 minute stages : evaluation of baseline, during exercise and recovery period. The fetal heart rate was monitored by computerized cardiotocography and maternal through frequency counter . Data were entered into a database created in specific public domain program Epi - Info 3.5.1 and Medcalc version 12.4.0 . The project is in accordance with Resolution 196/96 of the National Health Council and was approved by the Ethics Committee of the Universidade Estadual da Paraíba ( CEP- UEPB ) . Results: 120 eligible women were screened, 56 randomized to the stationary bike and 64 for group mat . The groups were homogeneous with respect to socioeconomic characteristics and obstetric and body mass index ( BMI ) . Regarding maternal heart rate , the increase was found during the exercise : 84 bpm in resting phase against 112 bpm during treadmill exercise ( p < 0.001 ) and 87 bpm in resting phase against 107 bpm during exercise the bicycle ( p < 0.001 ) , with values​​ returning to baseline quickly after exercise . There was no statistically significant difference when comparing the two groups ( p = .80 ) . The fetal heart rate decreased significantly during exercise in both groups: 141 bpm to 127 bpm at rest during treadmill exercise ( p < 0.001 ) and 141 bpm at rest to 129 bpm during exercise on the bicycle ( p < 0.001 ) . When the FCF was compared between the two exercise groups , we observed no statistically significant differences .The reduction of FHR during the exercise in both modes simultaneously was accompanied by an increase in variability with similar changes in both groups (p =0.09).