Virtual Trainer System (3rd Version) for Physical Activity Promotion in Middle-aged Hong Kong Adults

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

261 participants

Study Classification

INTERVENTIONAL

Study Start Date

2015-10-31

Study Completion Date

2017-10-30

Brief Summary

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Practicing a habitual physical activity is important for health. A Virtual Trainer (VT) online system was developed in 2006 (1st version) and improved in 2010 (2nd version) for encouraging an active lifestyle. This project intends to further improve the VT (3rd version) which incorporates more effective psychological and e-health theories, and disseminate it to Hong Kong middle-aged adults.

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Detailed Description

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Hong Kong is a highly urbanized city that many people work long hours daily and over the week, especially for those middle-aged adults. The limited time and lack of professional exercise instruction are always the barriers for them to participate in physical activity (PA). With the advances in information technology (IT), the knowledge of PA can be rapidly disseminated through the Internet and smartphone. We design an IT- instruction based lifestyle intervention program, with the purpose to improve PA level and health status in a sample of middle-aged Hong Kong adults. A two-arm parallel individual level randomized controlled trial (RCT) named "Follow Your Virtual Trainer (FYVT)" will be conducted among 200 healthy and sedentary Chinese adults aged from 40 to 65 years. The participants will be randomly allocated into intervention group or control group. Those in intervention group will under the instruction of a web-based computer software termed "Virtual Trainer", which interact with their smartphone apps, to conduct a 3-month self-planned PA training program. A serious of online video seminars with healthy lifestyle themes will be released to the participants biweekly among 3 months. After that, 6 months observation will be followed. Those in control group will only receive a written advice of standard PA recommendation, and the textual content of the seminars. The assessments will be implemented at baseline, 3, 6, and 9 month. Primary outcome is PA measured by accelerometer and International Physical Activity Questionnaire; the second outcomes include cardio-respiratory fitness, resting energy expenditure, anthropometrics, body composition, blood pressure, health-related quality of life, sleep quality and quantity, fatigue, behavior mediators, and maintenance of PA.

Conditions

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Sedentary Lifestyle

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

From 1,300 recruitment questionnaires, 261 met inclusion criteria, and 119 were randomly assigned into either n=53 in group 1 (VT3 intervention), 38 in group 2 (VT2 intervention), or 28 control (no-VT).

Primary Study Purpose

PREVENTION

Blinding Strategy

SINGLE

Participants

randomly assigned into either treatment 1, treatment 2, or control. All participants were managed in individual basis, hence no interaction between any participants was guaranteed. Participants were informed only their treatment without knowing the existence of other treatment.

Study Groups

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Physical activity promotion I

Participants in this group attended the "VT3" program (with Automatic HR detection)

Group Type EXPERIMENTAL

Follow Your Virtual Trainer (FYVT) program

Intervention Type BEHAVIORAL

Participants in intervention group will under the instruction of a web-based computer software termed "Virtual Trainer", which interact with their smartphone apps, to conduct a 3-month self-planned PA training program. A serious of online video seminars related to healthy lifestyle advice will be released to the participants among 3 months. After that, 6 months observation will be followed.

Physical activity promotion II

Participants in this group attended the "VT2" program (self PA report)

Group Type EXPERIMENTAL

Follow Your Virtual Trainer (FYVT) program

Intervention Type BEHAVIORAL

Participants in intervention group will under the instruction of a web-based computer software termed "Virtual Trainer", which interact with their smartphone apps, to conduct a 3-month self-planned PA training program. A serious of online video seminars related to healthy lifestyle advice will be released to the participants among 3 months. After that, 6 months observation will be followed.

Control

Participants in this group did not receive any VT treatment, and live as usual.

Group Type PLACEBO_COMPARATOR

Daily PA recommendation & healthy lifestyle suggestions

Intervention Type OTHER

A written advice of daily PA recommendation, and the textual content of the healthy lifestyle seminars will be provided to the participants.

Interventions

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Follow Your Virtual Trainer (FYVT) program

Participants in intervention group will under the instruction of a web-based computer software termed "Virtual Trainer", which interact with their smartphone apps, to conduct a 3-month self-planned PA training program. A serious of online video seminars related to healthy lifestyle advice will be released to the participants among 3 months. After that, 6 months observation will be followed.

Intervention Type BEHAVIORAL

Daily PA recommendation & healthy lifestyle suggestions

A written advice of daily PA recommendation, and the textual content of the healthy lifestyle seminars will be provided to the participants.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* aged 40 to 65 years
* able to understand Cantonese and read Chinese
* self-reported inactivity (no habitual exercise experience for at least 6 months)
* the baseline resting energy expenditure (REE) is less than 1.05 kcal•min-1 for men and 0.85 kcal•min-1 for women
* reachable by telephone
* have basic computer skills
* have smartphone and always surf internet (at least 4 times per week)
* will not leave Hong Kong for a long time (longer than 2 months) during the study period

Exclusion Criteria

* self-reported history of cardiovascular and pulmonary diseases, neurological disorder, musculo-skeletal disorder, and osteoarthritis
* receiving medically prescribed diet or PA intervention
* blood pressure ≥ 160/100 mmHg
* using of medication that may influence exercise performance
* for women, currently pregnant or plan to become pregnant in the next 1 years, and those receiving hormonal therapy

Minimum Eligible Age

40 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes