Trial reportAmerican journal of preventive medicine2018
Moderating Effects of Weather-Related Factors on a Physical Activity Intervention.
Trial report in American journal of preventive medicine, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to 2 registered trials, which are not on this map. Cited by 12 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Opt-IN: Optimization of Remotely Delivered Intensive Lifestyle Treatment for Obesity
SMART Weight Loss Management
Who cites it
12 citing papers in PubMed, 30 citations in OpenAlex.
- A Christmas themed physical activity intervention to increase participation in physical activity during Advent: pilot randomised controlled trial.BMJ (Clinical research ed.) · 2022Trial
- An Analysis of the Factors Associated with the Seasonal Variability of Physical Activity in Natural Environments in a Sample of Lithuanian Adults.Behavioral sciences (Basel, Switzerland) · 2025Article
- The Role of Environmental Factors in Technology-Assisted Physical Activity Intervention Studies Among Older Adults: Scoping Review.JMIR mHealth and uHealth · 2025Article
- Joint modeling the frequency and duration of accelerometer-measured physical activity from a lifestyle intervention trial.Statistics in medicine · 2023Article
- Seasonal variation in gestational diabetes mellitus among women in Norway: a national population-based study.BMJ open · 2023Article
- Effect of High Temperature on Walking among Residents of Rural and Urban Communities.Yonsei medical journal · 2022Article
- The relationship of weather with daily physical activity and the time spent out of home in older adults from Germany - the ActiFE study.European review of aging and physical activity : official journal of the European Group for Research into Elderly and Physical Activity · 2022Article
- Sedentary behavior among breast cancer survivors: a longitudinal study using ecological momentary assessments.Journal of cancer survivorship : research and practice · 2021Observational
- Person-specific dose-finding for a digital messaging intervention to promote physical activity.Health psychology : official journal of the Division of Health Psychology, American Psychological Association · 2021Article
- Environmental and Psychosocial Barriers Affect the Active Commuting to University in Chilean Students.International journal of environmental research and public health · 2021Article
- Relationship between stress and weight management behaviors during the COVID-19 pandemic among those enrolled in an internet program.Obesity science & practice · 2021Article
- Seasonal fluctuations in weight and self-weighing behavior among adults in a behavioral weight loss intervention.Eating and weight disorders : EWD · 2020Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors at 1 institution in 1 country.
Funding
Abstract
introductionThe purpose of this study is to identify whether weather-related factors moderate the effect of a physical activity (PA) intervention.
methodsParticipants (N=204, 77% female, mean age 33 [SD=11] years, mean BMI 28.2 [SD=7.1]) from the Make Better Choices 1 trial, enrolled April 2005 to April 2008, were randomized to one of two treatment conditions: (1) increase moderate to vigorous physical activity (MVPA) treatment group, or (2) decrease sedentary behavior control group. Participants wore an accelerometer for 5 weeks: a 2-week baseline assessment followed by a 3-week intervention. Accelerometer data were used to estimate minutes/day of MVPA. Average daily temperature, day length, and precipitation were obtained from the National Climatic Data Center and combined with the accelerometer data. Linear mixed effects models were used to determine whether these weather-related factors moderated the effect of the intervention on MVPA. Separate models were fit for season, daily average temperature, and day length.
resultsThere was a significant moderating effect of season on MVPA such that the PA intervention, as compared with control, increased MVPA 10.4 minutes more in the summer than in the winter (95% CI=1.1, 19.6, p=0.029). There was a significant moderating effect of daily temperature such that every 10°F increase in temperature was associated with an additional 1.5 minutes/day increase in the difference in MVPA increase between the two intervention conditions (95% CI=0.1, 2.9, p=0.015). There was a significant moderating effect of day length such that every additional hour of daylight was associated with a 2.23-minute increase in the PA intervention's impact on increasing MVPA (95% CI=0.8, 3.7, p=0.002).
conclusionsDay length and temperature had a significant moderating effect on change in MVPA during a PA intervention such that the intervention was less effective on colder days and on shorter days, independently. These results suggest that strategies to overcome environmental barriers should be considered when designing PA interventions for adults.
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.