Therapeutic Aquatic Exercise in Pregnancy: A Systematic Review and Meta-Analysis

Retrospective Analysis of Balance Parameters in Pregnant Women: A Sub-Analysis of a Randomized Controlled Trial

Objectives: Altered body biomechanics during pregnancy can lead to balance impairments and an increased risk of falls. Clinical exercise interventions can help regulate these biomechanical changes. Methods: A total of 101 pregnant participants (exercise group: n = 50; control group: n = 51) were retrospectively analyzed over an 8-week follow-up period. Single-leg balance parameters, including AP sway, ML sway, total body sway, OSD, and center of pressure velocity and acceleration, were assessed considering limb dominance. Measurements were taken at baseline and week 8. Repeated-measures ANOVA was used to analyze time-group interactions, with significance set at p < 0.001. The biomechanical impacts of participant height and body mass on center of pressure dynamics were also considered. Results: The exercise group (EG) demonstrated significant improvements in all balance parameters compared to the control group (CG) (p < 0.001), except for non-dominant anterior-posterior (AP) sway (p = 0.512). In the EG, medio-lateral (ML) and AP sway of the non-dominant limb were minimized, whereas these parameters were significantly increased in the CG. Although both groups exhibited an increased one-leg stance duration (OSD), the improvement was more pronounced in the EG. The controlled improvements observed in the EG suggest a protective effect of exercise on balance, particularly in the dominant limb. Conclusions: Clinical exercise interventions during pregnancy enhance balance parameters, reduce fall risk, and improve functional mobility. These findings suggest that structured exercise programs not only support maternal well-being but also improve reactive balance control. Given the biomechanical changes throughout pregnancy, future studies should examine the center of pressure velocity, acceleration, and the influence of maternal anthropometrics on postural stability to refine exercise recommendations.

Dietary amino acids, macronutrients, vaginal birth, and breastfeeding are associated with the vaginal microbiome in early pregnancy

The vaginal microbiome is a key player in the etiology of spontaneous preterm birth. This study aimed to illustrate maternal environmental factors associated with vaginal microbiota composition and function in pregnancy. Women in healthy pregnancy had vaginal microbial sampling from the posterior vaginal fornix performed at 16 weeks gestation. After shotgun metagenomic sequencing, heatmaps of relative abundance data were generated. Community state type (CST) was assigned, and alpha diversity was calculated. Demography, obstetric history, well-being, exercise, and diet using food frequency questionnaires were collected and compared against microbial parameters. A total of 119 pregnant participants had vaginal metagenomic sequencing performed. Factors with strongest association with beta diversity were dietary lysine (adj-R2 0.113, P = 0.002), valine (adj-R2 0.096, P = 0.004), leucine (adj-R2 0.086, P = 0.003), and phenylalanine (adj-R2 0.085, P = 0.005, Fig. 2D). Previous vaginal delivery and breastfeeding were associated with vaginal beta diversity (adj-R2 0.048, P = 0.003; adj-R2 0.045, P = 0.004), accounting for 8.5% of taxonomy variation on redundancy analysis. Dietary fat, starch, and maltose were positively correlated with alpha diversity (fat +0.002 SD/g, P = 0.025; starch +0.002 SD/g, P = 0.043; maltose +0.440 SD/g, P = 0.013), particularly in secretor-positive women. Functional signature was associated with CST, maternal smoking, and dietary phenylalanine, accounting for 8.9%-11% of the variation in vaginal microbiome functional signature. Dietary amino acids, previous vaginal delivery, and breastfeeding history were associated with vaginal beta diversity. Functional signature of the vaginal microbiome differed with community state type, smoking, dietary phenylalanine, and vitamin K. Increased alpha diversity correlated with dietary fat and starch. These data provide a novel snapshot into the associations between maternal environment, nutrition, and the vaginal microbiome.

IMPORTANCE

This secondary analysis of the MicrobeMom randomized controlled trial reveals that dietary amino acids, macronutrients, previous vaginal birth, and breastfeeding have the strongest associations with vaginal taxonomy in early pregnancy. Function of the vaginal niche is associated mainly by species composition, but smoking, vitamin K, and phenylalanine also play a role. These associations provide an intriguing and novel insight into the association between host factors and diet on the vaginal microbiome in pregnancy and highlight the need for further investigation into the complex interactions between the diet, human gut, and vaginal microbiome.

Influence of prenatal aquatic activities on fetal outcomes and maternal physical and mental outcomes: a systematic review and meta-analysis

BACKGROUND

Aquatic activities are becoming increasingly popular as a form of exercise during pregnancy. However, the effects of these activities on the physical and mental health outcomes of pregnant women during and after pregnancy as well as fetal outcomes remain unclear. This meta-analysis evaluated the current evidence regarding the effects of aquatic activities during pregnancy on neonatal and maternal outcomes.

METHODS

Three databases (PubMed, Cochrane Central electronic database, Embase) were searched from inception to July 17, 2024 for randomized controlled trials (RCTs) comparing the effects of aquatic activities versus standard prenatal care or no exercise on neonatal and maternal outcomes. Pooled outcome measures were determined using random-effects models.

RESULTS

Ten RCTs including 1949 patients met the criteria for inclusion in this meta-analysis. The results showed that prenatal aquatic activities could significantly improve maternal weight control (mean difference [MD]= -0.91, 95% confidence interval [CI]= -1.64 to -0.18, P = 0.01, I2 = 0.00%), improve maternal quality of life (standard mean difference [SMD] = 0.16, 95%CI = 0.03 to 0.28, P = 0.01, I2 = 0.00%), and extend fetal birth length (MD = 0.48, 95%CI = 0.10 to 0.87, P = 0.01, I2 = 0.00%) compared with standard prenatal care or no exercise, while no significant differences were observed in fetal birth weight, Apgar score at 1 min, Apgar score at 5 min, pH of umbilical cord blood, gestational age, rate of preterm delivery, incidence of postnatal depression and mode of delivery.

CONCLUSIONS

Prenatal aquatic activities can significantly improve maternal weight control and quality of life during pregnancy, and may promote longer birth length. However, additional studies are needed to confirm these findings.

Optimizing labor duration with pilates: evidence from a systematic review and meta-analysis of randomized controlled trials

BACKGROUND

Pilates has captured interest due to its possible advantages during pregnancy and childbirth. Although research indicates that Pilates may reduce labor duration, alleviate pain, and improve satisfaction with the childbirth experience, consensus on these outcomes remains elusive, underscoring the necessity for additional studies.

AIM

This systematic review and meta-analysis aimed to assess the impact of Pilates exercises on labor duration among pregnant women.

METHODS

The online database was searched to yield the literature using the terms of 'Pilates', 'childbirth', and 'labor duration', and similar terms including PubMed, Clinical Key, Scopus, Web of Science, Embase, and Cochrane Database of Systematic Reviews up to June 25, 2023. Studies were considered eligible if they were randomized or clinical controlled trials (RCTs/CCTs) published in English, focusing on healthy pregnant women without exercise contraindications. The studies needed to include interventions involving Pilates or exercise movement techniques, a comparison group with no exercise, and outcomes related to labor duration, the period of the active phase, and the second stage of delivery.

RESULTS

Eleven studies, totalling 1239 participants, were included in the analysis. These studies provided high-quality evidence from exercise only RCTs/CCTs. The findings indicated a significant reduction in the active phase of labor (8 RCTs, n = 1195; Mean Difference [MD] = -56.35, 95% Confidence Interval [CI] [-89.46 to -23.25]) and overall labor duration (8 RCTs, n = 898; MD = -93.93, 95% CI [-138.34 to -49.51]) in pregnant women who engaged in Pilates exercises compared to those who did not but doesn't affect on the duration of the second stage of labor (7 RCTs, n = 1135; MD = -0.11, 95% CI [-7.21 to 6.99]).

CONCLUSIONS

While this review primarily addresses the effects of Pilates on healthy and low-risk pregnant women, the findings suggest a potential role for Pilates in shortening labor duration. Therefore, engaging in Pilates or similar physical activities is recommended for pregnant women to potentially facilitate a more efficient labor process.

Current Understanding and Future Challenges in Physical Activity during Pregnancy

Obesity and overweight attributed to poor nutrition and a lack of physical activity increasingly become a serious problem among women of reproductive age [...].