James F. Sallis and Jacqueline Kerr
Mindy Fullilove, Chanam Lee and James F. Sallis
Nicola W. Burton, Gavin Turrell, Brian Oldenburg and James F. Sallis
This study assessed the relative contributions of psychological, social, and environmental variables to walking, moderate- and vigorous-intensity physical activity.
A questionnaire was mailed to a random sample (57% response rate). Analyses used a backwards elimination logistic regression model, removing and replacing individual variables, and adjusting for age, gender, household composition, and education (N = 1827).
The sociodemographic and correlate variables collectively accounted for 43% of the variation in total activity, 26% of walking, 22% of moderate-intensity activity and 45% of vigorous-intensity activity (Nagelkerke R2). Individually, the correlates accounted for 0.0 to 4.0% of unique variation, with habit, efficacy, and support having higher values. Physical health, discouragement, competition, and time management contributed more to vigorous-intensity activity. Anticipated benefits of social interactions and weight management contributed more to moderate-intensity activity. Neighborhood aesthetics contributed more to walking.
Walking, moderate- and vigorous-intensity activity might be associated with different correlates.
Javier Molina-García, James F. Sallis and Isabel Castillo
Commuting to university represents an opportunity to incorporate physical activity (walking or biking) into students’ daily routines. There are few studies that analyze patterns of transport in university populations. This cross-sectional study estimated energy expenditure from active commuting to university (ACU) and examined sociodemographic differences in findings.
The sample included 518 students with a mean age of 22.4 years (59.7% female) from 2 urban universities in Valencia, Spain. Time spent in each mode of transport to university and sociodemographic factors was assessed by self-report.
Nearly 35% of the students reported walking or biking as their main mode of transport. ACU (min/wk) were highest for walkers (168) and cyclists (137) and lowest for motorbike riders (0.0) and car drivers (16). Public transport users, younger students, low socioeconomic status students, and those living ≤ 2 km from the university had higher energy expenditure from active commuting than comparison groups. Biking was highest among those living 2–5 km from the university.
Our findings suggest that active commuting and public transit use generated substantial weekly energy expenditure, contributed to meeting physical activity recommendations, and may aid in obesity prevention.
Javier Molina-García, Ana Queralt, Isabel Castillo and James F. Sallis
This study examined changes in multiple physical activity domains during the transition out of high school and psychosocial and environmental determinants of these changes.
A 1-year prospective study was designed. The baseline sample was composed of 244 last-year high school students (58.6% female) from Valencia, Spain. Follow-up rate was 46%. Physical activity and potential determinants were measured by the Global Physical Activity Questionnaire and other evaluated scales in 2 waves.
Total physical activity and active commuting (AC) decreased, respectively, by 21% and 36%, only in males. At time 1, access to car/motorbike (inverse), planning/psychosocial barriers (inverse), street connectivity (positive) and parental education (inverse) were significantly associated with AC (P < .05). Prospectively, the increase in distance to school/workplace was associated with AC decrease among males (P < .001). In both genders, there was a decrease in leisure-time physical activity (LTPA; –35% in males, –43% in females). At time 1, self-efficacy and social support were positive correlates of LTPA (P < .05). Social support decreases were associated with reductions in LTPA for males (P < .05).
Several psychosocial and environmental correlates of physical activity change were identified, and these are promising targets for interventions.
Colin A. Armstrong, James F. Sallis, Melbourne F. Hovell and C. Richard Hofstetter
Components of the transtheoretical model of change were examined in a prospective study of the adoption of vigorous exercise in adults. Respondents to a random mail survey were resurveyed 2 years later. Those who reported no vigorous exercise at baseline were classified as either contemplators (n = 213) or precontemplators (n = 188). Contemplators had higher baseline self-efficacy scores than precontemplators (p < .001). In multivariate analyses, baseline stage of change was a significant predictor (p < .0005) of later adoption of vigorous exercise, even after controlling for differences in age, gender, and self-efficacy. During the first 6 months postbaseline, contemplators were nearly twice as likely as precontemplators to progress to the stage of action (46% vs. 24%), and four times more likely to progress to the stage of maintenance (25% vs. 6%). Use of the transtheoretical model in the study of exercise was supported in this prospective examination of exercise in a community sample.
M. Katherine Kraft, James F. Sallis, Anne Vernez Moudon and Leslie S. Linton
Gregory J. Norman, Sandra K. Nutter, Sherry Ryan, James F. Sallis, Karen J. Calfas and Kevin Patrick
Neighborhood-level environmental features have been associated with adult physical activity and weight status, but this link has not been established for adolescents.
Community design and access to recreational facilities variables were derived using geographic information systems (GIS) for 799 adolescents (age 11 to 15 y, mean = 12.8 y, 53% girls, 43% ethnic minority). Environment variables were calculated for a 1-mile buffer around each participant’s residence. Accelerometers measured min/d of physical activity.
Number of nearby recreation facilities and number of nearby parks correlated positively with girls’ physical activity, and intersection density inversely related to girls’ physical activity. Retail floor area ratio correlated positively with boys’ physical activity. No community design or access to recreation variables were related to BMI-percentile.
There was limited evidence that both community design and access to recreation facilities variables were associated with adolescent physical activity, but additional built environment variables need to be studied that have particular relevance for youth.
Guadalupe X. Ayala, Amy Gammelgard, James F. Sallis and John. P. Elder
Studies have examined the association between work-related characteristics and physical activity participation; however few studies include U.S. Latinos.
Six hundred and seventy two Latino adults of San Diego County were randomly sampled and surveyed to assess their health behaviors in the fall of 2006. Analyses were conducted with 633 respondents with physical activity data (94% of sample), examining the extent to which job category and hours worked per week were associated with 4 domains of physical activity defined by MET-minutes per week using the long IPAQ.
Multivariate analysis of variance models were computed. After adjusting for covariates, occupational MET-minutes per week were associated with job category and hours worked per week, such that blue collar workers expended more MET-minutes per week than white collar or nonworkers, and those who worked 20 hours a week or less expended less occupational physical activity compared with those who worked more than 20 hours per week. In addition, nonworkers reported expending more household MET-minutes per week than blue collar or white collar workers.
Efforts are needed to increase the physical activity levels of Mexican immigrants/Mexican-Americans, with interventions designed in consideration of the individual’s work status.
Dori E. Rosenberg, Gregory J. Norman, Nicole Wagner, Kevin Patrick, Karen J. Calfas and James F. Sallis
Sedentary behavior is related to obesity, but measures of sedentary behaviors are lacking for adults. The purpose of this study was to examine the reliability and validity of the Sedentary Behavior Questionnaire (SBQ) among overweight adults.
Participants were 49 adults for the 2 week test-retest reliability study (67% female, 53% white, mean age = 20) and 401 overweight women (mean age = 41, 61% white) and 441 overweight men (mean age = 44, 81% white) for the validity study. The SBQ consisted of reports of time spent in 9 sedentary behaviors. Outcomes for validity included accelerometer measured inactivity, sitting time (International Physical Activity Questionnaire), and BMI. Intraclass correlation coefficients (ICCs) assessed reliability and partial correlations assessed validity.
ICCs were acceptable for all items and the total scale (range = .51–.93). For men, there were significant relationships of SBQ items with IPAQ sitting time and BMI. For women, there were relationships between the SBQ and accelerometer inactivity minutes, IPAQ sitting time, and BMI.
The SBQ has acceptable measurement properties for use among overweight adults. Specific measures of sedentary behavior should be included in studies and population surveillance.