Clinical trial
Effects of Wearable Device Functions and Health Coaching on Device-measured Movement Behaviours and Cardiometabolic Risk Factors in Adults With Central Obesity
Recruiting now · Not applicable · 1 countries · Registry ID NCT07379970
What this study is about
This study is a randomized controlled trial. The objective of this study is to investigate: 1. the effects of 1-year evidence-based interventions incorporating wearable device functions alone on device-measured movement behaviours and cardiometabolic risk factors among adults with central obesity; and 2. the effects of 1-year evidence-based interventions incorporating wearable device functions combined with health coaching on device-measured movement behaviours and cardiometabolic risk factors among adults with central obesity. We hypothesise that the use of wearable device functions in combination with health coaching will lead to significantly greater improvements in device-measured movement behaviours and cardiometabolic risk factors compared with no intervention and wearable device functions alone, both after the 12-month intervention and at the 6-month follow-up. This study will implement a parallel-group, open-label, 1-year randomized controlled trial involving 133 adults aged 40 years or older with central obesity. The trial will examine the effects of a cutting-edge intervention using evidence-based wearable device functions alone or in combination with evidence-based health coaching on movement behaviours and cardiometabolic risk factors. All participants will provide written informed consent prior to participation and will be informed that they may withdraw from the study at any time during the study period. A staff member without access to participant information will generate a computer-based randomization list using permuted blocks of six, with two participants allocated to each of the three groups (two intervention groups and one control group) per block, in a 2:2:2 allocation ratio. The control group will not receive a Fitbit device and will be asked to continue their usual lifestyle. The two intervention groups will use four evidence-based Fitbit functions: step goal setting, sleep goal setting, activity prompts, and community functions. The key difference between the two intervention groups is that one group will additionally receive a structured health coaching program adapted from the U.S. Centers for Disease Control and Prevention (CDC) National Diabetes Prevention Program (NDPP), as used in our prior trial. The CDC NDPP recommends that at least 22 health coaching sessions be delivered over a 1-year period, depending on participants' needs, and provides corresponding curricula and handouts outlining session content. Coaching sessions will be delivered by trained research staff who have received appropriate professional training in health coaching delivery. The lifestyle change program will include, but not be limited to: 1. education on cardiometabolic disease risk factors (e.g., type 2 diabetes, coronary heart disease, and stroke); 2. goal planning and goal setting; 3. strategies for self-monitoring physical activity, sleep, diet, and stress; 4. strategies for initiating and maintaining favourable levels of physical activity, diet, and sleep; 5. strategies for obtaining support from family, friends, and co-workers; and 6. review of achievements and challenges during the intervention period, with goal setting and planning for the subsequent 6-month follow-up period. Participants will attend the research laboratory on three occasions: at baseline, immediately after the 12-month intervention, and at the 6-month follow-up. Assessments will include demographic information, standing height, body weight, body mass index,…
Basic eligibility
Full registry criteria
Treatments and study arms
Fitbit Wearable Device
Participants will use a Fitbit wearable device with the following evidence-based functions enabled: step goal setting (10% higher than baseline daily steps), sleep goal setting (8 hours per day), activity prompts (vibration alert when fewer than 250 steps are accumulated per hour), and community features such as activity or exercise challenges. These functions support self-monitoring, goal setting, prompts, feedback, and social support.
Lifestyle Coaching Program
Participants will receive a structured lifestyle coaching program adapted from the U.S. Centers for Disease Control and Prevention National Diabetes Prevention Program (NDPP). The program includes at least 22 coaching sessions delivered over approximately 12 months. Sessions focus on cardiometabolic disease risk factors, goal setting, self-monitoring of physical activity, sleep, diet, and stress, strategies to initiate and maintain healthy behaviors, social support, and review of progress and challenges.
Primary outcomes
The primary outcome is the 24-hour composition of movement behaviors, defined as the relative distribution of time spent in sedentary behavior, light physical activity, moderate-to-vigorous physical activity (MVPA), and sleep within a 24-hour period. These components will be derived from accelerometer data and jointly analyzed as a single compositional outcome using compositional data analysis methods.
Study locations
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