A Systematic Review of eHealth Interventions to Promote Physical Activity in Adults with Obesity or Overweight

Physical activity self-efficacy online intervention for adults with obesity: protocol for a feasibility study

BACKGROUND

Even without weight loss, adults with obesity can greatly benefit from regular physical activity. The Physical Activity Self-efficacy (PAS) intervention is an online behavioral intervention newly developed to promote physical activity in adults with obesity by providing capability-enhancing learning opportunities. The objective of this manuscript is to describe the protocol for a feasibility study designed to investigate the feasibility and acceptability of implementing the PAS online intervention for adults with obesity recruited from a local weight management center in the United States of America (USA).

METHODS

The study design is a prospective, double-blind, parallel-group individual randomized pilot trial. Thirty participants will be randomly assigned to the PAS group or usual care group to achieve a 1:1 group assignment. Recruitment of participants is scheduled to begin on 1 March 2024 at a local weight management center within a private healthcare system in the USA. There are six eligibility criteria for participation in this study (e.g., a body mass index ≥ 25.00 kg/m2). Eligibility verification and data collection will be conducted online. Three waves of data collection will take up to 14 weeks depending on participants' progress in the study. The primary feasibility outcomes in the study will be: (a) participation rate, (b) engagement behavior, and (c) a preliminary effect size estimate for the effect of the PAS intervention on physical activity. Instruments designed to measure demographic information, anthropometric characteristics, self-efficacy, and acceptability will be included in the survey battery. A research-grade accelerometer will be used to measure free-living physical activity objectively. Data will be analyzed using descriptive statistics and inferential statistical models under an intention-to-treat approach.

DISCUSSION

Results are intended to inform the preparation of a future definitive randomized controlled trial.

TRIAL REGISTRATION

ClinicalTrials.gov, NCT05935111, registered 7 July 2023.

Community-Dwelling Adults' Perceived Versus Actual Risk of Cardiovascular Disease, Body Mass Index, and Physical Activity Levels and Related Factors

CONTEXT

The difference between actual and perceived risk levels shows distorted risk perception. Unrealistic perceptions of cardiovascular disease (CVD) risks and insufficient knowledge about CVD risk factors can not only hinder the adoption of a positive lifestyle change but also obstruct preventive efforts.

OBJECTIVE

The aim of this study was to evaluate the concordance between perceived and actual risks, body mass index (BMI), and physical activity levels.

DESIGN

This descriptive study included 522 community-dwelling adults in 2 different regions of Antalya/Turkey. The actual CVD risk level of the participants was determined using the "HeartScore program," actual body weight was determined according to BMI, and actual activity levels were found using the "International Physical Activity Questionnaire Short Form (IPAQ-SF)." The perceived risks were measured with the CVD Risk and Risk Factors Perception Determination Questionnaire. CVD Risk Factors Knowledge Level (CARRF-KL) Scale was used to calculate the participants' level of knowledge about the risk factors.

RESULTS

There was no concordance between the participants' actual and perceived CVD risks. A below-average agreement was found between the participants' actual and perceived BMI levels. In terms of actual measurements, it was seen that slightly obese individuals have a realistic perception. There was a weak agreement between the actual and perceived physical activity levels of the adults. Knowledge about the CVD risk factors of adults does not affect the perception of CVD risk and BMI and physical activity.

CONCLUSIONS

Adults have an optimistic risk perception regarding CVD risk, BMI, and physical activity levels. It may be beneficial to periodically assess actual risks to change skewed perceptions of CVD and risk factors. These findings will inform the development of tailored intervention strategies and policies for these adults.

The Effect of Tailored Short Message Service (SMS) on Physical Activity: Results from a Three-Component Randomized Controlled Lifestyle Intervention in Women with PCOS

This analysis of secondary outcome measures of a randomized controlled trial was conducted to study the effect of a one-year three-component (cognitive behavioural therapy, diet, exercise) lifestyle intervention (LSI), with or without additional Short Message Service (SMS) support, on physical activity and aerobic capacity in overweight or obese women with polycystic ovary syndrome (PCOS). Women diagnosed with PCOS and a BMI > 25 kg/m² were randomly assigned to LSI with SMS support (SMS+, n = 60), LSI without SMS support (SMS-, n = 63) or care as usual (CAU, n = 60) in order to lose weight. Based on results from the International Physical Activity Questionnaire (IPAQ), we found a significant within-group increase after one year for SMS+ in the high physical activity category (+31%, p < 0.01) and sitting behaviour decreased (Δ -871 min/week, p < 0.01). Moreover, the peak cycle ergometer workload increased within SMS+ (Δ +10 watts, p < 0.01). The SMS+ group also demonstrated a significantly different increase in walking metabolic equivalent of task minutes (METmin)/week compared with CAU after one year (Δ 1106 METmin/week, p < 0.05). Apart from this increase in walking activity, no other between-group differences were found in this trial. Overall, based on within-group results, SMS support seemed to help with improving physical activity and aerobic capacity and decreasing sedentary behaviour.