Assessing Physical Activity in Temporary Spaces: Application of SOPARC / iSOPARC® for Play Streets

Purpose: The System for Observing Play and Recreation in Communities (SOPARC) is a valid, reliable method for understanding how people engage in physical activity (PA) in various permanent settings (e.g., parks) and contexts. However, its utility, reliability, and validity in temporary spaces has not been examined. Temporary spaces can provide PA opportunities often absent in low-income communities due to inadequate safe permanent PA spaces. Play Streets involve temporary closure of streets or other publicly accessibly spaces (e.g., parking lots, open-fields) to create safe play spaces for a specified time-period. We describe the utility, reliability, and validity of using SOPARC to assess PA in temporary spaces like Play Streets. Method: Trained SOPARC/iSOPARC (iPad App) research staff completed systematic observations during Play Streets occurring in four diverse low-income rural U.S. communities during summer 2017. Results: We successfully used iSOPARC to document PA and how spaces were used at Play Streets (n = 16), confirming its utility, reliability, and validity. Unlike observations of permanent spaces, target areas could not be pre-established since play spaces often changed during set-up, requiring time onsite to identify target areas and boundaries. Play areas frequently appeared and/or disappeared during Play Streets, and this was systematically addressed by using physical target area boundaries instead of activities. Conclusions: Understanding how temporary spaces are used for PA is critical for promoting their use. SOPARC/iSOPARC methods are useful in a Play Streets' context; however, systematic methods and training are needed to address inherent unpredictable and dynamic changes within and across target areas.

Systematic review of how Play Streets impact opportunities for active play, physical activity, neighborhoods, and communities

BACKGROUND

Active play and physical activity are important for preventing childhood obesity, building healthy bones and muscles, reducing anxiety and stress, and increasing self-esteem. Unfortunately, safe and accessible play places are often lacking in under-resourced communities. Play Streets (temporary closure of streets) are an understudied intervention that provide safe places for children, adolescents, and their families to actively play. This systematic review examines how Play Streets impact opportunities for children and adolescents to engage in safe active play and physical activity, and for communities and neighborhoods. Methods for evaluating Play Streets were also examined.

METHODS

A systematic literature review was conducted in Academic Search Complete, CINHAL, PsycINFO, PubMED, Web of Science, and Google Scholar. Peer-reviewed intervention studies published worldwide were included if they were published in English, through December 2017 and documented free-to-access Play Streets or other temporary spaces that incorporated a designated area for children and/or adolescents to engage in active play. Systematic data extraction documented sample, implementation, and measurement characteristics and outcomes.

RESULTS

Of 180 reviewed abstracts, 6 studies met inclusion criteria. Studies were conducted in five different countries (n = 2 in U.S.), using mostly cross-sectional study designs (n = 4). Physical activity outcomes were measured in half of the studies; one used observational and self-report measures, and two used device-based and self-report measures. In general, Play Streets provided safe places for child play, increased sense of community, and when measured, data suggest increased physical activity overall and during Play Streets.

CONCLUSIONS

Play Streets can create safe places for children to actively play, with promise of increasing physical activity and strengthening community. Given the popularity of Play Streets and the potential impact for active play, physical activity, and community level benefits, more rigorous evaluations and systematic reporting of Play Streets' evaluations are needed.

Sibship, physical activity, and sedentary behavior: a longitudinal, observational study among Mexican-heritage sibling dyads

BACKGROUND

Shared genetic and environmental factors suggest that family relationships are important predictors of obesity-related behaviors, yet little is known about how siblings influence physical activity and sedentary behaviors. This study examined physical activity and sedentary behavior between sibling dyads across summer and fall time points and determined if birth order and gender modify the relationship between sibling behaviors.

METHODS

Mexican-heritage families residing in colonias along the United States-Mexico border were recruited using promotoras de salud to participate in summer and school year surveys. Eighty-seven sibling dyads had complete data for the physical activity sub-study: 21 older brother-younger brother, 21 older brother-younger sister, 23 older sister-younger brother, and 22 older sister-younger sister dyads. Physical activity and sedentary behavior were measured using a validated 7-day recall instrument to create summary measures of weekly active, moderate-to-vigorous physical activity (MVPA) metabolic equivalents (MET), sitting, and screen time minutes. We used linear regression analyses to examine changes over time and the association between older and younger sibling behavior.

RESULTS

During summer, older siblings (mean age = 11.2 years) reported 1069 active minutes and 1244 sitting minutes per week; younger siblings (mean age = 8.3 years) reported 1201 active minutes and 1368 sitting minutes per week. Younger brothers reported fewer active minutes (mean = - 459.6; p = 0.01) and fewer MVPA MET-minutes (mean = - 2261.7; p = 0.02) of physical activity during the fall. Within all 87 dyads, older sibling physical activity was significantly associated with younger sibling active minutes (B = 0.45;p = 0.004) and MET-minutes (B = 0.45;p = 0.003) during summer but not fall; older sibling sedentary behavior was significantly associated with younger sibling sitting (B = 0.23;p = 0.01) and screen time minutes (B = 0.23;p = 0.004) during fall but not summer. After stratifying by gender dyad groups, younger brother behavior was strongly associated with older brother behavior at both time points.

CONCLUSION

Younger siblings appear to emulate the physical activity behaviors of their older siblings during non-school summer months and sedentary behaviors of older siblings during school-time fall months, especially older brother-younger brother dyads. Family-based interventions to increase physical activity and decrease sedentary behavior are growing in popularity, but more work is needed to understand the role of sibling influences.

Qualitative differences in estrogenic/antiestrogenic effects of clomiphene and zuclomiphene

Depending upon the rat assay end point, the estrogenic or antiestrogenic activity of clomiphene (CC) or its isomer, zuclomiphene (Zu), varies considerably. For uterine/body weight ratio, Zu = estradiol greater than CC; for the estrogenic effect on uterine epithelium, Zu greater than estradiol = CC; higher CC doses were antiestrogenic. For endometrial stroma, Zu = estradiol much greater than CC. In the effect of estrogen receptor, low-dose CC = estradiol; high-dose CC was antiestrogenic. For Zu, both doses were about equal and highly antiestrogenic. Essentially the same was seen with progesterone receptor. For plasma LH suppression, Zu much greater than CC much greater than estradiol; but for plasma FSH, estradiol much greater than CC = Zu. The intrinsic estrogenicity of these compounds was made more apparent by the castrate status of the rats. This spectrum of activities may make it possible to select estrogenic or antiestrogenic activities for clinical purposes, depending upon the end-organ effect desired.