The effect of exercise training and motivational counselling on physical activity behaviour and psychosocial factors in pregnant women: secondary analyses of the FitMum randomised controlled trial investigating prenatal physical activity

BACKGROUND

A physically active lifestyle is beneficial during pregnancy. However, little is known about physical activity (PA) behaviour and psychosocial factors in women during and after pregnancy. This study examined exercise behavioural regulation, exercise self-efficacy, health-related quality of life, sickness absence and musculoskeletal pain in pregnant women offered either structured supervised exercise training, motivational counselling on PA, or standard prenatal care in the FitMum randomised controlled trial.

METHODS

Two hundred and eighteen healthy inactive pregnant women were randomised to structured supervised exercise training (n = 87), motivational counselling on PA (n = 86) or standard prenatal care (n = 45). The women answered the Behavioural Regulation in Exercise Questionnaire-2 (BREQ-2), the Pregnancy Exercise Self-Efficacy Scale (P-ESES-DK) and the Short Form 36 Health Survey Questionnaire (SF-36) at baseline (gestational age (GA) of max 15 weeks), GA 28 and 34 weeks, and one year after delivery. Sickness absence and low back and/or pelvic girdle pain were likewise reported in questionnaires at baseline and GA 28 weeks.

RESULTS

Participants offered structured supervised exercise training or motivational counselling on PA had higher autonomous motivation for exercise during pregnancy compared with participants receiving standard prenatal care (e.g., difference in intrinsic regulation at GA 28 weeks, structured supervised exercise training vs. standard prenatal care: mean difference in score 0.39 [0.16; 0.64], p < 0.001). Participants offered structured supervised exercise training also had higher exercise self-efficacy during pregnancy (e.g., GA 28 weeks, structured supervised exercise training vs. standard prenatal care: mean difference in score 6.97 [2.05; 12.02], p = 0.005). All participants reported high exercise self-efficacy at baseline and medium exercise self-efficacy during pregnancy and one year after delivery. No differences were found between groups in health-related quality of life, sickness absence or low back and/or pelvic girdle pain during pregnancy. No group differences were found one year after delivery.

CONCLUSION

Structured supervised exercise training and motivational counselling on PA had important effects on autonomous exercise motivation during pregnancy. Exercise self-efficacy was also increased with structured supervised exercise training compared to standard prenatal care. No group differences in health-related quality of life, sickness absence, or pain were found during and after pregnancy. No effects were found one year post-delivery after intervention cessation.

TRIAL REGISTRATION

The study was approved by the Danish National Committee on Health Research Ethics (#H-18011067) and the Danish Data Protection Agency (#P-2019-512). The study adheres to the principles of the Helsinki declaration. Written informed consent was obtained at inclusion.

Counselling on physical activity in Danish antenatal care: A qualitative study of experiences from both the pregnant woman's and the care provider's perspective

OBJECTIVES

Physical activity during pregnancy is beneficial to maternal and fetal health, but most pregnant women do not achieve the recommended level of physical activity. To investigate how antenatal care can promote physical activity during pregnancy, this study explores experiences of physical activity counselling from the perspectives of pregnant women and antenatal care providers.

METHODS

In a qualitative design with an inductive approach individual semi-structured interviews with 19 pregnant women and seven antenatal care providers were performed and analyzed using thematic analysis.

RESULTS

The themes "Experiencing inadequate counselling", "Benefiting from individualized guidance", and "Voicing a need for enhanced support" cover the perspectives from the participating pregnant women. They often experienced insufficient physical activity counselling that left them insecure about proper physical activity during pregnancy. The pregnant women desired individualized and concrete advice and early and continuous support. From antenatal care providers the themes "Providers' perceived barriers in counselling", "Balancing the act of counselling", and "Acknowledging potential for enhanced counselling" were identified. They perceived barriers towards counselling including time restraints, lack of interest, and doubts about certain physical activity during pregnancy but expressed trying to adjust the counselling to meet the woman's individual situation. They acknowledged that continuous support during pregnancy and updated knowledge and increased focus among providers might improve physical activity counselling.

CONCLUSIONS

Pregnant women received scarce counselling on physical activity in antenatal care, while care providers described several barriers towards counselling on physical activity. Both pregnant women and antenatal care providers recognized opportunities for enhanced physical activity counselling.

Effects of Two Physical Activity Interventions on Sleep and Sedentary Time in Pregnant Women

Pregnancy is often associated with poor sleep and high sedentary time (SED). We investigated the effect of physical activity (PA) interventions on sleep and SED in pregnant women. A secondary analysis of a randomized controlled trial (n = 219) explored the effect of structured supervised exercise training (EXE) or motivational counseling on PA (MOT) compared to standard prenatal care (CON) on sleep and SED during pregnancy. Three times during pregnancy, sleep was determined by the Pittsburgh Sleep Quality Index (PSQI) and SED by the Pregnancy Physical Activity Questionnaire (PPAQ). Also, a wrist-worn consumer activity tracker measured sleep and SED continuously. Data from the activity tracker confirmed that sleep time decreases, and SED increases by approx. 30 and 24 min/day, respectively, from baseline (maximum gestational age (GA) week 15) to delivery. Compared to CON, the global PSQI score was better for EXE in GA week 28 (-0.8 [-1.5; -0.1], p = 0.031) and for both EXE and MOT in GA week 34 (-1 [-2; -0.5], p = 0.002; -1 [-2; -0.1], p = 0.026). In GA week 28, SED (h/day) from PPAQ was lower in EXE compared to both CON and MOT (-0.69 [-1; -0.0], p = 0.049; -0.6 [-1.0; -0.02], p = 0.042). In conclusion, PA interventions during pregnancy improved sleep quality and reduced SED.

Physical activity in pregnancy: a mixed methods process evaluation of the FitMum randomised controlled trial interventions

BACKGROUND

Physical activity (PA) at moderate intensity is recommended for healthy pregnant women. The three-arm FitMum randomised controlled trial showed that it was possible to increase PA level during pregnancy with structured supervised exercise training (EXE) compared to standard care. Motivational counselling on PA (MOT) did not increase PA. This process evaluation aims to understand the implementation and mechanisms of impact of EXE and MOT.

METHODS

A mixed methods process evaluation was conducted using the UK Medical Research Council's process evaluation framework by assessing implementation (reach, fidelity, and dose) and mechanisms of impact of the two interventions provided to pregnant women in FitMum. Data was collected both quantitatively (n = 220) and qualitatively (n = 20).

RESULTS

The FitMum trial reached educated pregnant women (80% having an educational level ≥ bachelor's degree) with high autonomy of everyday life. Most participants (58%) were recruited at their first-trimester ultrasonic scan. Reasons to participate were personal (91%) and altruistic (56%). The intervention dose was delivered as intended with high fidelity in the original physical intervention setup and in the altered online setup during the COVID-19 restrictions. A low dose received in EXE (1.3 [95% CI, 1.1; 1.5] sessions/week) was partly explained by the pre-scheduled EXE sessions favouring participants with a flexible everyday life and a supportive social network. Dose received in EXE increased during online intervention delivery. Participants in MOT received 5.2 [4.7; 5.7] of 7 sessions. Mechanisms of impact comprised a perception of intervention commitment among participants in EXE due to the scheduled EXE sessions, whereas participants in MOT considered themselves as PA self-determined. PA was considered as constrained activities in EXE and included in daily activities in MOT.

CONCLUSION

The FitMum interventions was delivered with high fidelity. During COVID-19, the dose received in EXE increased compared to the previous physical setup. Mechanisms of impact as commitment, perception of empowerment and perception of PA as well as the paradox between prioritising PA and family and the need of a flexible everyday life need to be considered when offering pregnant women PA interventions. Future interventions should consider a combination of physical and online exercise training for pregnant women.

Effects of Structured Supervised Exercise Training or Motivational Counseling on Pregnant Women's Physical Activity Level: FitMum - Randomized Controlled Trial

Background

Physical activity (PA) during pregnancy is an effective and safe way to improve maternal health in uncomplicated pregnancies. However, compliance with PA recommendations remains low among pregnant women.

Objective

The purpose of this study was to evaluate the effects of offering structured supervised exercise training (EXE) or motivational counseling on PA (MOT) during pregnancy on moderate-to-vigorous intensity physical activity (MVPA) level. Additionally, complementary measures of PA using the Pregnancy Physical Activity Questionnaire (PPAQ) and gold standard doubly labeled water (DLW) technique were investigated. The hypotheses were that both EXE and MOT would increase MVPA in pregnancy compared with standard care (CON) and that EXE would be more effective than MOT. In addition, the association between MVPA and the number of sessions attended was explored.

Methods

A randomized controlled trial included 220 healthy, inactive pregnant women with a median gestational age of 12.9 (IQR 9.4-13.9) weeks. A total of 219 women were randomized to CON (45/219), EXE (87/219), or MOT (87/219). The primary outcome was MVPA (minutes per week) from randomization to the 29th gestational week obtained by a wrist-worn commercial activity tracker (Vivosport, Garmin International). PA was measured by the activity tracker throughout pregnancy, PPAQ, and DLW. The primary outcome analysis was performed as an analysis of covariance model adjusting for baseline PA.

Results

The average MVPA (minutes per week) from randomization to the 29th gestational week was 33 (95% CI 18 to 47) in CON, 50 (95% CI 39 to 60) in EXE, and 40 (95% CI 30 to 51) in MOT. When adjusted for baseline MVPA, participants in EXE performed 20 (95% CI 4 to 36) minutes per week more MVPA than participants in CON (P=.02). MOT was not more effective than CON; EXE and MOT also did not differ. MVPA was positively associated with the number of exercise sessions attended in EXE from randomization to delivery (P=.04). Attendance was higher for online (due to COVID-19 restrictions) compared with physical exercise training (P=.03). Adverse events and serious adverse events did not differ between groups.

Conclusions

Offering EXE was more effective than CON to increase MVPA among pregnant women, whereas offering MOT was not. MVPA in the intervention groups did not reach the recommended level in pregnancy. Changing the intervention to online due to COVID-19 restrictions did not affect MVPA level but increased exercise participation.

Trial Registration

ClinicalTrials.gov NCT03679130; https://clinicaltrials.gov/ct2/show/NCT03679130

International Registered Report Identifier (IRRID)

RR2-10.1136/bmjopen-2020-043671

Structured supervised exercise training or motivational counselling during pregnancy on physical activity level and health of mother and offspring: FitMum study protocol

INTRODUCTION

A physically active lifestyle during pregnancy improves maternal and offspring health but can be difficult to follow. In Denmark, less than 40% of pregnant women meet physical activity (PA) recommendations. The FitMum study aims to explore strategies to increase PA during pregnancy among women with low PA and assess the health effects of PA. This paper presents the FitMum protocol, which evaluates the effects of structured supervised exercise training or motivational counselling supported by health technology during pregnancy on PA level and health of mother and offspring.

METHODS AND ANALYSIS

A single-site three-arm randomised controlled trial that aims to recruit 220 healthy, pregnant women with gestational age (GA) no later than week 15 and whose PA level does not exceed one hour/week. Participants are randomised to one of three groups: structured supervised exercise training consisting of three weekly exercise sessions, motivational counselling supported by health technology or a control group receiving standard care. The interventions take place from randomisation until delivery. The primary outcome is min/week of moderate-to-vigorous intensity PA (MVPA) as determined by a commercial activity tracker, collected from randomisation until GA of 28 weeks and 0-6 days, and the secondary outcome is gestational weight gain (GWG). Additional outcomes are complementary measures of PA; clinical and psychological health parameters in participant, partner and offspring; analyses of blood, placenta and breastmilk samples; process evaluation of interventions; and personal understandings of PA.

ETHICS AND DISSEMINATION

The study is approved by the Danish National Committee on Health Research Ethics (# H-18011067) and the Danish Data Protection Agency (# P-2019-512). Findings will be disseminated via peer-reviewed publications, at conferences, and to health professionals via science theatre performances.

TRIAL REGISTRATION NUMBER

NCT03679130.

PROTOCOL VERSION

This paper was written per the study protocol version 8 dated 28 August 2019.

Validity and reliability of the Danish version of the pregnancy physical activity questionnaire to assess levels of physical activity during pregnancy

INTRODUCTION

Physical inactivity during pregnancy is associated with complications on the mother and child. Thus, assessments of physical activity in pregnant women is relevant. The American validated questionnaire, Pregnancy Physical Activity Questionnaire (PPAQ), measures physical activity during pregnancy, and a translated Danish version of the questionnaire is needed.

OBJECTIVES

To translate the original version of PPAQ into Danish (PPAQ-DK) and to determine face and content validity, and reliability of PPAQ-DK in pregnant Danish women.

MATERIALS AND METHODS

PPAQ was translated into Danish through a systematic process. Subsequently, face and content validity was examined on pregnant women. PPAQ-DK was revised, and the test-retest reliability of PPAQ-DK was investigated in another sample of pregnant women, where the respondents completed the questionnaire twice with one week apart, using an Intraclass Correlation Coefficient (ICC). Internal consistency reliability was determined using Cronbach´s α.

RESULTS

The face validity of the original PPAQ was achieved by interviews of 10 pregnant women (age (mean ± SD): 31.0 ± 3.0 years; 50% in second and 50% in third trimester) and minor changes in the revised version of PPAQ-DK were performed. The content validity was accepted by an expert panel. In 66 pregnant women (aged 30.2 ± 4.8 years; 16.7, 63.6, and 19.7% in first, second and third trimester, respectively), the ICC in the test-retest reliability was 0.79 (0.68-0.87) of the overall PPAQ score. The Cronbach's α in the internal consistency reliability analysis was 0.7 in the overall PPAQ score.

CONCLUSIONS

The PPAQ-DK is within acceptable reliability and is a valid and reliable tool to measure overall physical activity level of pregnant Danish women.