Population characteristics associated with adherence to prenatal group-based exercise programs.

Community-based supervised group exercise may be an effective option to increase activity levels throughout pregnancy. Previous studies that have explored predictors of low adherence to exercise during pregnancy have not examined group-based settings. We analysed an international cohort of 347 pregnant women who participated in group-based prenatal exercise interventions (from <20 weeks to 34-36 weeks pregnant). Probable adherence predictors informed by previous literature that were assessed included: pre-pregnancy physical activity level and body mass index (BMI) classification, age, number of previous pregnancies, and education level. Adherence was measured by attendance. Adjusted odds ratios (aOR) and 95% confidence intervals (CI) were calculated to explore the relationship between the selected predictors and high adherence (≥70%). Post-secondary education level versus only secondary (aOR 5.28; CI 1.67; 16.72) or primary level (aOR 13.82; CI 4.30; 44.45) presented greater likelihood to have high adherence to the exercise intervention than low adherence. Future research and public health initiatives should consider implementing strategies to overcome education-related barriers to improve accessibility to prenatal exercise.

Obesity can offset the cardiometabolic benefits of gestational exercise.

Pregnancy exercise can prevent excessive gestational weight gain (EGWG), gestational diabetes mellitus (GDM) and hypertension (GH), but inter-individual variability has not been explored. We aimed to analyze the prevalence--and potential sociodemographic and medical predictors of--non-responsiveness to gestational exercise, and the association of non-responsiveness with adverse pregnancy outcomes. Among 688 women who completed a supervised light-to-moderate intensity exercise program (three ~1-h sessions/week including aerobic, resistance, and pelvic floor muscle training) until near-term, those who showed EGWG, GDM or GH were considered 'non-responders'. A low prevalence of non-responders was observed for GDM (3.6%) and GH (3.4%), but not for EGWG (24.2%). Pre-pregnancy obesity was the strongest predictor of non-responsiveness for GH (odds ratio 8.40 [95% confidence interval 3.10-22.78] and EGWG (5.37 [2.78-10.39]), whereas having a highest education level attenuated the risk of being non-responder for GDM (0.10 [0.02-0.49]). Non-responsiveness for EGWG was associated with a higher risk of prolonged labor length, instrumental/cesarean delivery, and macrosomia, and of lower Apgar scores. No association with negative delivery outcomes was found for GDM/GH. In summary, women with pre-pregnancy obesity might require from additional interventions beyond light-to-moderate intensity gestational exercise (e.g., diet and/or higher exercise loads) to ensure cardiometabolic benefits.

Physical activity and prenatal depression: going beyond statistical significance by assessing the impact of reliable and clinical significant change.

BACKGROUND: Previous literature supports exercise as a preventative agent for prenatal depression; however, treatment effects for women at risk for prenatal depression remain unexplored. The purpose of the study was to examine whether exercise can lower depressive symptoms among women who began pregnancy at risk for depression using both a statistical significance and reliable and clinically significant change criteria. METHODS: This study is a secondary analysis of two randomized controlled trials that followed the same exercise protocol. Pregnant women were allocated to an exercise intervention group (IG) or control group (CG). All participants completed the Center for Epidemiological Depression (CES-D) scale at gestational week 9-16 and 36-38. Women with a baseline score ⩾16 were included. A clinically reliable cut-off was calculated as a 7-point change in scores from pre- to post-intervention. RESULTS: Thirty-six women in the IG and 25 women in the CG scored ⩾16 on the CES-D at baseline. At week 36-38 the IG had a statistically significant lower CES-D score (14.4 ± 8.6) than the CG (19.4 ± 11.1; p < 0.05). Twenty-two women in the IG (61%) had a clinically reliable decrease in their post-intervention score compared to eight women in the CG (32%; p < 0.05). Among the women who met the reliable change criteria, 18 (81%) in the IG and 7 (88%) in the CG had a score <16 post-intervention, with no difference between groups (p > 0.05). CONCLUSIONS: A structured exercise program might be a useful treatment option for women at risk for prenatal depression.

Methotrexate Gold Nanocarriers: Loading and Release Study: Its Activity in Colon and Lung Cancer Cells.

In the present study, the synthesis of gold nanoparticles (AuNPs) loaded with methotrexate (MTX) has been carried out in order to obtain controlled size and monodispersed nanocarriers of around 20 nm. The characterization study shows metallic AuNPs with MTX polydispersed on the surface. MTX is linked by the replacement of citrate by the MTX carboxyl group. The drug release profiles show faster MTX release when it is conjugated, which leads to the best control of plasma concentration. Moreover, the enhanced release observed at pH 5 could take advantage of the pH gradients that exist in tumor microenvironments to achieve high local drug concentrations. AuNP-MTX conjugates were tested by flow cytometry against lung (A-549) and colon (HTC-116) cancer cell lines. Results for A-549 showed a weaker dose-response effect than for colon cancer ones. This could be related to the presence of folate receptors in line HTC-116 in comparison to line A-549, supporting the specific uptake of folate-conjugated AuNP-MTX by folate receptor positive tumor cells. Conjugates exhibited considerably higher cytotoxic effects compared with the effects of equal doses of free MTX. Annexin V-PI tests sustained the cell death mechanism of apoptosis, which is normally disabled in cancer cells.

Barriers to promote cardiovascular health in community pharmacies: a systematic review.

Community pharmacists play an important role in the provision of health promotion services, and community pharmacies are considered as a potentially ideal site for cardiovascular health promotion. Information based on a systematic review of barriers to promoting cardiovascular health in community pharmacy is currently lacking. We have sought to identify the most important barriers to cardiovascular health promotion in the community pharmacy. We have systematically searched PubMed and International Pharmaceutical Abstracts for a period of 15 years from 1 April 1998 to 1 April 2013, contacted subject experts and hand-searched bibliographies. We have included peer-reviewed articles, with English abstracts in the analysis, if they reported community pharmacists' perceptions of the barriers to cardiovascular health promotion activities in a community pharmacy setting. Two reviewers have independently extracted study characteristics and data. We identified 24 studies that satisfy the eligibility criteria. The main barriers to cardiovascular health promotion in the community pharmacy included pharmacist-related factors; practice site factors; financial factors; legal factors; and patient-related factors. This review will help to provide reliable evidence for health promotion practitioners of the barriers to promoting cardiovascular health in the community pharmacy setting. This knowledge is valuable for the improvement of cardiovascular health promotion in this setting and guiding future research.

Exercise during pregnancy protects against hypertension and macrosomia: randomized clinical trial.

BACKGROUND: The prevalence of all pregnancies with some form of hypertension can be up to 10%, with the rates of diagnosis varying according to the country and population studied and the criteria used to establish the diagnosis. Prepregnancy obesity and excessive gestational weight gain (GWG) of all body mass index (BMI) categories have been associated with maternal hypertensive disorders and linked to macrosomia (>4000 g) and low birthweight (<2500 g). No large randomized controlled trial with high adherence to an exercise program has examined pregnancy-induced hypertension and these associated issues. We investigated whether women adherent (≥80% attendance) to an exercise program initiated early showed a reduction in pregnancy-induced hypertension and excessive GWG in all prepregnancy BMI categories, and determined if maternal exercise protected against macrosomia and low birthweight. OBJECTIVE: We sought to examine the impact of a program of supervised exercise throughout pregnancy on the incidence of pregnancy-induced hypertension. STUDY DESIGN: A randomized controlled trial was used. Women were randomized into an exercise group (N = 382) or a control group (N = 383) receiving standard care. The exercise group trained 3 d/wk (50-55 min/session) from gestational weeks 9-11 until weeks 38-39. The 85 training sessions involved aerobic exercise, muscular strength, and flexibility. RESULTS: High attendance to the exercise program regardless of BMI showed that pregnant women who did not exercise are 3 times more likely to develop hypertension (odds ratio [OR], 2.96; 95% confidence interval [CI], 1.29-6.81, P = .01) and are 1.5 times more likely to gain excessive weight if they do not exercise (OR, 1.47; 95% CI, 1.06-2.03, P = .02). Pregnant women who do not exercise are also 2.5 times more likely to give birth to a macrosomic infant (OR, 2.53; 95% CI, 1.03-6.20, P = .04). CONCLUSION: Maternal exercise may be a preventative tool for hypertension and excessive GWG, and may control offspring size at birth while reducing comorbidities related to chronic disease risk.

Resistance Exercise in Pregnancy and Outcome.

As the health benefits of exercise are increasingly recognized, the traditional advice to rest during pregnancy has changed toward a more healthy and active pregnancy, therefore different forms of exercise have been integrated into the life of the pregnant woman. Although the benefits of using a combination of resistance and aerobic exercises are not yet determined, studies about resistance and strengthen training programs are few although no adverse outcomes were reported.

Exercise during pregnancy. A narrative review asking: what do we know?

Although there is no consensus as to whether exercise is beneficial during pregnancy, most studies report it poses no risk to either the mother or the fetus, and many suggest it to be beneficial to both. This review, which examines the evidence available, also reveals the many differences in study design followed, the type of exercise undertaken and the variables measured, which make it difficult to compare results. Advances in our understanding of the effects of exercise during pregnancy might best be made by undertaking randomised clinical trials with standardised protocols. However, most of the studies examining the relationship between exercise and pregnancy report no complications on maternal or fetal well-being. This is also in line with recent review studies advising that the pregnant population without obstetric contraindications should be encouraged to exercise during pregnancy. Therefore, the results of the present review stimulate those responsible for the healthcare of the pregnant woman to recommend moderate exercise throughout pregnancy without risk to maternal and fetal health.

Gestational Exercise and Maternal and Child Health: Effects until Delivery and at Post-Natal Follow-up.

We studied the influence of pregnancy exercise on maternal/offspring cardiometabolic health until delivery and at follow-up. We pooled data from two randomized controlled trials from our group that were performed following the same methodology (one unpublished). We also collected follow-up data de novo from the participants of both trials and their offspring. In total, 1348 women with uncomplicated, singleton gestations were assigned to an intervention (n = 688, performing a supervised, moderate-intensity exercise program (three sessions/week)) or control group (n = 660). Maternal outcomes were excessive gestational weight gain (EGWG), gestational hypertension/diabetes and, at follow-up, return to pre-pregnancy weight within six months, hypertension, overweight/obesity, and other cardiometabolic conditions. Offspring outcomes were macrosomia and low-birthweight and, at follow-up, overweight/obesity, low-weight, and cardiometabolic conditions. Adherence to the intervention, which proved safe, was > 95%. Pregnancy exercise reduced the risk of EGWG, gestational hypertension, and diabetes (adjusted odds ratio (OR) and 95% confidence interval: 0.60 (0.46-0.79), 0.39 (0.23-0.67), and 0.48 (0.28-0.84)), and it was associated with a greater likelihood of returning to pre-pregnancy weight (2.37 (1.26-4.54)) and a lower risk of maternal cardiometabolic conditions (0.27 (0.08-0.95)) at the end of follow-up (median 6.1 years (interquartile range 1.8)). Pregnancy exercise also reduced the risk of macrosomia (0.36 (0.20-0.63)) and of childhood overweight/obesity during the first year (0.20 (0.06-0.63)). Our findings suggest that pregnancy exercise might protect maternal/offspring health.

Prevalence, types, and pattern of intimate partner violence among pregnant women in Lima, Peru.

This study assesses the prevalence, types, and pattern of intimate partner violence (IPV) during lifetime and current pregnancy for 2,392 women in Lima, Peru. The reported lifetime prevalence of any IPV (physical, sexual, or emotional) is 45.1%. For women who experienced abuse, the prevalence of lifetime physical, emotional, and sexual IPV is 34.2%, 28.4%, and 8.7%, respectively. Older (>/= 30 years), unmarried, employed, and economically disadvantaged women and those with little education are more likely to experience lifetime and pregnancy IPV. Efforts at universal antepartum IPV screening and appropriate interventions are needed to reduce the burden of violence experienced by pregnant women.

Impact of maternal education on response to lifestyle interventions to reduce gestational weight gain: individual participant data meta-analysis.

OBJECTIVES: To identify if maternal educational attainment is a prognostic factor for gestational weight gain (GWG), and to determine the differential effects of lifestyle interventions (diet based, physical activity based or mixed approach) on GWG, stratified by educational attainment. DESIGN: Individual participant data meta-analysis using the previously established International Weight Management in Pregnancy (i-WIP) Collaborative Group database (https://iwipgroup.wixsite.com/collaboration). Preferred Reporting Items for Systematic reviews and Meta-Analysis of Individual Participant Data Statement guidelines were followed. DATA SOURCES: Major electronic databases, from inception to February 2017. ELIGIBILITY CRITERIA: Randomised controlled trials on diet and physical activity-based interventions in pregnancy. Maternal educational attainment was required for inclusion and was categorised as higher education (≥tertiary) or lower education (≤secondary). RISK OF BIAS: Cochrane risk of bias tool was used. DATA SYNTHESIS: Principle measures of effect were OR and regression coefficient. RESULTS: Of the 36 randomised controlled trials in the i-WIP database, 21 trials and 5183 pregnant women were included. Women with lower educational attainment had an increased risk of excessive (OR 1.182; 95% CI 1.008 to 1.385, p =0.039) and inadequate weight gain (OR 1.284; 95% CI 1.045 to 1.577, p =0.017). Among women with lower education, diet basedinterventions reduced risk of excessive weight gain (OR 0.515; 95% CI 0.339 to 0.785, p = 0.002) and inadequate weight gain (OR 0.504; 95% CI 0.288 to 0.884, p=0.017), and reduced kg/week gain (B -0.055; 95% CI -0.098 to -0.012, p=0.012). Mixed interventions reduced risk of excessive weight gain for women with lower education (OR 0.735; 95% CI 0.561 to 0.963, p=0.026). Among women with high education, diet based interventions reduced risk of excessive weight gain (OR 0.609; 95% CI 0.437 to 0.849, p=0.003), and mixed interventions reduced kg/week gain (B -0.053; 95% CI -0.069 to -0.037,p<0.001). Physical activity based interventions did not impact GWG when stratified by education. CONCLUSIONS: Pregnant women with lower education are at an increased risk of excessive and inadequate GWG. Diet based interventions seem the most appropriate choice for these women, and additional support through mixed interventions may also be beneficial.

Intimate partner violence (IPV) and preeclampsia among Peruvian women.

OBJECTIVE: Mounting evidence supports the view that intimate partner violence (IPV) is an important cause of maternal mortality. Some, but not all, prior studies suggest that IPV is associated with increased risks of maternal medical conditions such as hypertensive disorders of pregnancy which are leading causes of maternal mortality worldwide. We assessed the relation between IPV and risk of preeclampsia among Peruvian women. STUDY DESIGN: We conducted a case-control study at two large hospitals in Lima, Peru. Preeclampsia cases were 339 women with pregnancy-induced hypertension and proteinuria (i.e., preeclampsia). Controls were 337 normotensive women. Information concerning women's exposure to physical and emotional violence during pregnancy was collected during in-person interviews conducted after delivery and while patients were in hospital. Odds ratios (OR) and 95% confidence intervals (CI) were estimated from logistic regression models. RESULTS: The prevalence of IPV was 43.1% among cases and 24.3% among controls. Compared with those reporting never exposure to IPV during pregnancy, women reporting any exposure had a 2.4-fold increased risk of preeclampsia (OR=2.4; 95% CI: 1.7-3.3). The association was strengthened slightly after adjusting for maternal age, parity and pre-pregnancy adiposity (OR=2.7; 95% CI: 1.9-3.9). Emotional abuse in the absence of physical violence was associated with a 3.2-fold (95% CI: 2.1-4.9) increased risk of preeclampsia. Emotional and physical abuse during pregnancy was associated with a 1.9-fold increased risk of preeclampsia (95% CI: 1.1-3.5). CONCLUSIONS: IPV among pregnant women is common and is associated with an increased risk of preeclampsia. These data support recent calls for coordinated global health efforts to prevent violence against women.

Association of intimate partner physical and sexual violence with unintended pregnancy among pregnant women in Peru.

OBJECTIVE: To examine the associations between lifetime physical and/or sexual intimate partner violence (IPV) with pregnancy intent among pregnant women in Lima, Peru. METHODS: A total of 2167 women who delivered at the Instituto Nacional Materno Perinatal, Lima, Peru were interviewed during the postpartum recovery period. Logistic regression was used to estimate multivariable adjusted odds ratios and 95% confidence intervals. RESULTS: Lifetime physical or sexual violence (40.0%) and unintended pregnancies (65.3%) were common in the study population. Compared with non-abused women, abused women had a 1.63-fold increased risk for unintended pregnancy. Unintended pregnancy risk was 3.31-fold higher among women who experienced both physical and sexual abuse compared with non-abused women. The prevalence and severity of physical violence during pregnancy was greater among women with unintended pregnancies compared with women with planned pregnancies. CONCLUSION: The findings indicate the need to include IPV screening and treatment in prenatal care and reproductive health settings.

Aquatic Activities During Pregnancy Prevent Excessive Maternal Weight Gain and Preserve Birth Weight: A Randomized Clinical Trial.

PURPOSE: The aim of the present study was to examine the influence of a supervised and regular program of aquatic activities throughout gestation on maternal weight gain and birth weight. DESIGN: A randomized clinical trial. SETTING: Instituto de Obstetricia, Ginecología y Fertilidad Ghisoni (Buenos Aires, Argentina). PARTICIPANTS: One hundred eleven pregnant women were analyzed (31.6 ± 3.8 years). All women had uncomplicated and singleton pregnancies; 49 were allocated to the exercise group (EG) and 62 to the control group (CG). INTERVENTION: The intervention program consisted of 3 weekly sessions of aerobic and resistance aquatic activities from weeks 10 to 12 until weeks 38 to 39 of gestation. MEASURES: Maternal weight gain, birth weight, and other maternal and fetal outcomes were obtained by hospital records. ANALYSIS: Student unpaired t test and χ2 test were used; P values ≤.05 indicated statistical significance. Cohen's d was used to determinate the effect size. RESULTS: There was a higher percentage of women with excessive maternal weight gain in the CG (45.2%; n = 28) than in the EG (24.5%; n = 12; odds ratio = 0.39; 95% confidence interval: 0.17-0.89; P = .02). Birth weight and other pregnancy outcomes showed no differences between groups. CONCLUSION: Three weekly sessions of water activities throughout pregnancy prevents excessive maternal weight gain and preserves birth weight. TRIAL REGISTRATION: The clinicaltrial.gov identifier: NCT 02602106.

Exercise during pregnancy is associated with a shorter duration of labor. A randomized clinical trial.

OBJECTIVE: to examine the influence of an exercise program throughout pregnancy on the duration of labor in healthy pregnant women. STUDY DESIGN: A randomized clinical trial was used (Identifier: NCT02109588). In all, 508 healthy pregnant women were randomly assigned between 9 and 11 weeks of gestation to either a Control Group (CG, N = 253) or an Exercise Group (EG, N = 255). A moderate aerobic exercise program throughout pregnancy (three weekly sessions) was used as the intervention. Mann-Whitney and Pearson χ2 tests were performed to analyze differences between groups. Survival techniques through the Kaplan-Meier method were used to estimate the median time to delivery of each group; and Gehan-Breslow-Wilcoxon tests were performed to compare survival distribution between the two arms. The primary outcome studied was the length of the stages of labor. Secondary outcomes included mode of delivery, gestational age, maternal weight gain, preterm delivery, use of epidural, birthweight, Apgar scores and arterial cord pH. RESULTS: Women randomized to the EG had shorter first stage of labor (409 vs 462 min, p = 0.01), total duration of labor (450 vs 507 min, p = 0.01) as well as combined duration of first and second stages of labor (442 vs 499 min, p = 0.01). The probabilities of a woman being delivered at 250 min and 500 min (median times) were 19.1% and 62.5% in the experimental group vs 13.7% and 50.8% in the control group (Z = -2.37, p = 0.018). Results also revealed that women in the intervention group were less likely to use an epidural; and that the prevalence of neonate macrosomia was higher in the control group. CONCLUSION: A supervised physical exercise program throughout pregnancy decreased the duration of the first phase of labor as well as total time of the first two phases together, leading to a decrease in total labor time.

Influence of Land or Water Exercise in Pregnancy on Outcomes: A Cross-sectional Study.

PURPOSE: This study aimed to compare the cross-sectional results from three experimental studies conducted on land, in water, and in mixed form (land + water) during pregnancy on maternal and newborn outcomes. METHODS: A cross-sectional design was used to analyze the results of three randomized clinical trials in healthy pregnant women from Madrid (Spain) and Buenos Aires (Argentina). Five hundred and sixty-eight pregnant women were recruited. For each of the studies, the number of women in the exercise group totaled 107 for study 1 (land), 49 women for study 2 (water), and 101 women for study 3 (land + water). A total of 311 women represented the control group (CG) (pooled together from all three studies). RESULTS: Total maternal weight gain was different between study 1 and CG (11.7 vs 13.4 kg, P = 0.001, Cohen's d = 0.38) as well as the percentage of pregnant women with excessive weight gain (20.6%, n = 22, vs 37.9%, n = 118, respectively, P = 0.005, χ = 16.6, OR = 0.42, 95% confidence interval = 0.25-0.71). The number of pregnant women with gestational diabetes in CG was significantly higher than that in studies 2 and 3 (CG n = 22/7.1%; study 2, n = 0/0%; and study 3, n = 1/1%; P = 0.03, χ = 8.9). CONCLUSION: Exercise performed on land is more effective than aquatic activities in preventing excessive maternal weight gain, whereas combined programs (land + aquatic) or water exercise programs may be more effective in preventing gestational diabetes.

Effects of antenatal diet and physical activity on maternal and fetal outcomes: individual patient data meta-analysis and health economic evaluation.

BACKGROUND: Diet- and physical activity-based interventions in pregnancy have the potential to alter maternal and child outcomes. OBJECTIVES: To assess whether or not the effects of diet and lifestyle interventions vary in subgroups of women, based on maternal body mass index (BMI), age, parity, Caucasian ethnicity and underlying medical condition(s), by undertaking an individual patient data (IPD) meta-analysis. We also evaluated the association of gestational weight gain (GWG) with adverse pregnancy outcomes and assessed the cost-effectiveness of the interventions. DATA SOURCES: MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, Database of Abstracts of Reviews of Effects and Health Technology Assessment database were searched from October 2013 to March 2015 (to update a previous search). REVIEW METHODS: Researchers from the International Weight Management in Pregnancy Collaborative Network shared the primary data. For each intervention type and outcome, we performed a two-step IPD random-effects meta-analysis, for all women (except underweight) combined and for each subgroup of interest, to obtain summary estimates of effects and 95% confidence intervals (CIs), and synthesised the differences in effects between subgroups. In the first stage, we fitted a linear regression adjusted for baseline (for continuous outcomes) or a logistic regression model (for binary outcomes) in each study separately; estimates were combined across studies using random-effects meta-analysis models. We quantified the relationship between weight gain and complications, and undertook a decision-analytic model-based economic evaluation to assess the cost-effectiveness of the interventions. RESULTS: Diet and lifestyle interventions reduced GWG by an average of 0.70 kg (95% CI -0.92 to -0.48 kg; 33 studies, 9320 women). The effects on composite maternal outcome [summary odds ratio (OR) 0.90, 95% CI 0.79 to 1.03; 24 studies, 8852 women] and composite fetal/neonatal outcome (summary OR 0.94, 95% CI 0.83 to 1.08; 18 studies, 7981 women) were not significant. The effect did not vary with baseline BMI, age, ethnicity, parity or underlying medical conditions for GWG, and composite maternal and fetal outcomes. Lifestyle interventions reduce Caesarean sections (OR 0.91, 95% CI 0.83 to 0.99), but not other individual maternal outcomes such as gestational diabetes mellitus (OR 0.89, 95% CI 0.72 to 1.10), pre-eclampsia or pregnancy-induced hypertension (OR 0.95, 95% CI 0.78 to 1.16) and preterm birth (OR 0.94, 95% CI 0.78 to 1.13). There was no significant effect on fetal outcomes. The interventions were not cost-effective. GWG, including adherence to the Institute of Medicine-recommended targets, was not associated with a reduction in complications. Predictors of GWG were maternal age (summary estimate -0.10 kg, 95% CI -0.14 to -0.06 kg) and multiparity (summary estimate -0.73 kg, 95% CI -1.24 to -0.23 kg). LIMITATIONS: The findings were limited by the lack of standardisation in the components of intervention, residual heterogeneity in effects across studies for most analyses and the unavailability of IPD in some studies. CONCLUSION: Diet and lifestyle interventions in pregnancy are clinically effective in reducing GWG irrespective of risk factors, with no effects on composite maternal and fetal outcomes. FUTURE WORK: The differential effects of lifestyle interventions on individual pregnancy outcomes need evaluation. STUDY REGISTRATION: This study is registered as PROSPERO CRD42013003804. FUNDING: The National Institute for Health Research Health Technology Assessment programme.

Benefits of aerobic or resistance training during pregnancy on maternal health and perinatal outcomes: A systematic review.

OBJECTIVE: To understand what evidence exists with regard to maternal and offspring benefits of aerobic and/or resistance training during pregnancy. METHODS: Systematic review of RCTs (published until May 2015) with healthy pregnant women and focusing on the benefits of exercise interventions on maternal health or perinatal outcomes. Studies were ranked as high/low quality, and a level of evidence was established according to the number of high-quality studies and consistency of the results. RESULTS: 61 RCTs were analyzed. The evidence for a benefit of combined exercise [aerobic+resistance (muscle strength)] interventions on maternal cardiorespiratory fitness and prevention of urinary incontinence was strong. A weak or insufficient level of evidence was found for the rest of interventions and outcomes CONCLUSION: The exercise modality that seems to induce a more favorable effect on maternal health is the combination of aerobic and resistance exercises during pregnancy.

Regular Exercise Throughout Pregnancy Is Associated With a Shorter First Stage of Labor.

PURPOSE: The aim of the present study was to examine the influence of moderate physical exercise throughout pregnancy on the duration of labor stages. DESIGN: Study was a randomized controlled trial. SETTING: The study took place at Hospital Puerta de Hierro and Hospital Severo Ochoa in Madrid, Spain. SUBJECTS: We examined 166 pregnant women (31.6 ± 3.8 years), and all had uncomplicated and singleton gestation. Of these 83 were allocated to the exercise group (EG) and 83 to the control group (CG). INTERVENTION: Women from the EG participated in a physical conditioning program throughout pregnancy, which included 55- to 60-minute sessions, 3 days per week. MEASURES: Pregnancy outcomes were measured: duration of labor stages, gestational age, weight gain, type of delivery, birth weight, birth size, head circumference, Apgar score, pH of umbilical cord. ANALYSIS: Student's unpaired t-tests and χ(2) tests were used; p values of < .05 indicated statistical significance. Cohen's d was used to determine the effect size. RESULTS: Significant differences were found in the duration of the first stage of labor (EG = 389.6 ± 347.64 minutes vs. CG = 515.72 ± 353.36 minutes; p = .02, effect size Cohen's d = .36). The second and third stages did not differ between the study groups. CONCLUSION: A physical exercise program during pregnancy is associated with a shorter first stage of labor. These results may have important relevance to public health.