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The aim of this study is to examine the effect of walking exercise in postpartum women and to evaluate the weight management intervention by using step tracker. The following hypotheses will be tested:
Postpartum is an important phase in the reproductive years of women. Weight retention after childbirth can lead to chronic diseases (CD), including obesity, cardiovascular disease and other metabolic related diseases such as diabetes or high blood pressure. There are some studies suggesting that pedometer is useful to encourage women in increasing their physical activity.
We propose to evaluate the effects of physical activity intervention based on wearable steps tracker and optimal weight loss for postpartum women. It will be a pilot stratified randomized intervention study on 200 postpartum women at KK Women's and Children's Hospital. Women who are above 21 years old and had given birth between 6 weeks and 6 months before will be recruited under the study. Postpartum women who physically fit to participate in moderate intensity walking are eligible to participate in the study. Women who participated in other weight management or physical activity intervention projects will be excluded from the study. Study enrolment will be done at the Specialist Outpatient Clinics for postnatal check-ups.
This was 12-16 weeks randomized, single-center, unblinded intervention study (Figure 1). Participants were allocated in a 1:1 ratio to either the intervention group (Actigraphy watch) or the control group (no Actigraphy watch). All participants received the standard routine postpartum care, physical activity counselling with advice on walking and motivational messages. Randomization was done using sealed envelopes. Eligible participants had baseline measurements taken during the study enrolment and consent taking where anthropometric measurements, and blood samples were collected and various questionnaires were filled out to assess baseline demographics and lifestyle characteristics.
All the participants in the intervention group received an Actigraphy watch to wear all the time except for swimming and showering. Walking advises and motivational text messages will be sent to the study participants by the research team.
Data will be collected through questionnaires and clinical measurements. The questionnaires include socio-economic factors, and self-reported physical activity. Bio-physical measurements will be obtained from anthropometric measurements of participants, are collected from the participants at their follow-up time points. Objective physical activity will be collected using an Actigraphy watch.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Actigraphy watch intervention | Experimental | All the participants in the intervention group received an Actigraphy watch to wear all the time except for swimming and showering. Walking advises and motivational text messages will be sent to the study participants by the research team. |
|
| Standard care group | No Intervention | Walking advises and motivational text messages will be sent to the study participants by the research team. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Actigraphy watch intervention | Device | Participants in this group only will be given an Actigraphy watch to track their physical activity levels. |
|
| Measure | Description | Time Frame |
|---|---|---|
| Weight change at the end of the intervention at 10 weeks postpartum | Using measured weight in kgs | At 8-12 weeks postpartum from baseline (4-8 weeks postpartum) |
| Weight change at the end of the intervention at 14 weeks postpartum | Using measured weight in kgs | At 12 to 16 weeks postpartum from baseline ( 4-8 weeks postpartum) |
| Measure | Description | Time Frame |
|---|---|---|
| Change in body mass index measures from baseline, 10 weeks postpartum and 14 weeks postpartum | Calculating body mass index (kg/m2) using height (m) and weight (kg) measures | Baseline (4-8 weeks postpartum), 10 weeks postpartum ( 8-12 weeks postpartum) and 14 weeks postpartum (12-16 weeks postpartum) |
| Change in waist circumference measures from baseline, 10 weeks postpartum and 14 weeks postpartum |
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Inclusion Criteria:
Exclusion Criteria:
Only women
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| Name | Affiliation | Role |
|---|---|---|
| Bernard Su Min Chern, MD | KK Women's and Children's Hospital | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| KK Women's and Children's Hospital | Singapore | 229899 | Singapore |
| PubMed Identifier | Type | Citation | Retractions |
|---|---|---|---|
| 22176722 | Background | Maturi MS, Afshary P, Abedi P. Effect of physical activity intervention based on a pedometer on physical activity level and anthropometric measures after childbirth: a randomized controlled trial. BMC Pregnancy Childbirth. 2011 Dec 16;11:103. doi: 10.1186/1471-2393-11-103. | |
| 21085038 | Background | Davenport MH, Giroux I, Sopper MM, Mottola MF. Postpartum exercise regardless of intensity improves chronic disease risk factors. Med Sci Sports Exerc. 2011 Jun;43(6):951-8. doi: 10.1249/MSS.0b013e3182051155. |
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The IPD will not be shared due to privacy concerns and the potential risk of re-identification, especially in a small sample size or a highly specific population
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| ICF | No | No | Yes | Informed Consent Form | Dec 9, 2021 | Aug 4, 2025 | ICF_000.pdf |
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| ID | Term |
|---|---|
| D001836 | Body Weight Changes |
| D009043 | Motor Activity |
| ID | Term |
|---|---|
| D001835 | Body Weight |
| D012816 | Signs and Symptoms |
| D013568 | Pathological Conditions, Signs and Symptoms |
| D001519 | Behavior |
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Randomized, single-center, unblinded intervention study with a 1:! allocation ratio.
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Using waist circumference measures in cm |
| Baseline (4-8 weeks postpartum), 10 weeks (8-12 weeks postpartum) and 14 weeks (12-16 weeks postpartum) |
| Change in waist to hip ratio from baseline, 10 weeks and 14 weeks postpartum | Using waist circumference and hip measures | Baseline 6 weeks postpartum (4-8 weeks postpartum), 10 weeks postpartum (8-12 weeks postpartum) and 14 weeks postpartum (12-16 weeks postpartum). |
| Change in body fat mass from baseline, 10 and 14 weeks postpartum | Using body fat mass percentage measured using the bioelectrical impedance analysis scale | Baseline, 10 weeks postpartum (8-12 weeks postpartum) and 14 weeks (12-16 weeks postpartum) |
| Change in fasting lipid profile from baseline, 10 weeks and 14 weeks postpartum | Using fasting lipid profiles (total cholesterol, Low-density lipoprotein (LDL) cholesterol, High-density lipoprotein (HDL) cholesterol, triglycerides) of blood samples in mmol/L | Baseline, 10 weeks (8-12 week postpartum) and 14 weeks (12-16 weeks postpartum) |
| Change in glucose homeostasis markers from baseline at 10 weeks and 14 weeks postpartum | Using fasting glucose and fasting insulin from blood samples in mmol/L | Baseline, 10 weeks (8-12 weeks postpartum), and 14 weeks (12-16 weeks postpartum) |
| Change in blood pressure from baseline at 10 weeks and 14 weeks postpartum | Using measured systolic and diastolic blood pressure in mm/Hg | At baseline, 10 weeks (8-12 weeks postpartum) and 14 weeks (12-16 weeks postpartum) |
| Change in self-reported frequency of moderate to vigorous physical activity at baseline, 10 weeks and 14 weeks | Self-reported data from the International Physical Activity Questionnaire (IPAQ) to assess frequency of moderate to vigorous physical activity. | At baseline, 10 weeks (8-12 weeks postpartum) and 14 weeks (12-16 weeks postpartum). |
| Change in self-reported duration of moderate to vigorous physical activity at baseline, 10 weeks and 14 weeks | Self-reported data from the International Physical Activity Questionnaire (IPAQ) to assess duration of moderate to vigorous physical activity.. | At baseline, 10 weeks (8-12 weeks postpartum) and 14 weeks (12-16 weeks postpartum). |
| Change in duration of objective moderate to vigorous physical activity at baseline, 10 weeks and 14 weeks | MVPA will be assessed using an Actigraphy accelerometer Duration: Average daily/weekly minutes of MVPA (minutes per week). | Baseline, 10 weeks postpartum (8-12 weeks postpartum) and 14 weeks (12-16 weeks). |
| Change in frequency of objective moderate to vigorous physical activity at baseline, 10 weeks and 14 weeks | MVPA will be assessed using an Actigraphy accelerometer Frequency: Number of days per week with ≥30 minutes of MVPA (days per week). | Baseline, 10 weeks postpartum (8-12 weeks postpartum) and 14 weeks (12-16 weeks). |
| 41917836 | Derived | Quah PL, Tan KH, Tan MH, Chern BSM. Evaluating wearable-supported exercise interventions for reducing postpartum weight: a randomized controlled trial. BMC Pregnancy Childbirth. 2026 Apr 1;26(1):515. doi: 10.1186/s12884-026-08937-1. |