Social support for physical activity of middle school students

If You Make it Free, Will They Come? Using a Physical Activity Accessibility Model to Understand the Use of a Free Children's Recreation Pass

BACKGROUND

Children's sedentary lifestyles and low physical activity levels may be countered using population-level interventions. This study examines factors influencing the use of a free community-wide physical activity access pass for grade 5 students (G5AP).

METHODS

A natural experiment with longitudinal data collection. A sample of 881 children completed the 9-month follow-up survey self-reporting where they used the G5AP. Two analyses were conducted: Getis-Ord GI* geographic cluster analysis of the spatial distribution of users, and logistic regression examining the relationship between use and accessibility (informational, economic, and geographic) and mobility options, while accounting for intrapersonal and interpersonal factors.

RESULTS

Overall, 44.9% of children used the G5AP with clusters of high use in urban areas and low use in the suburbs. Other factors significantly related to G5AP included gender (girls), informational accessibility (active recruitment), economic accessibility (median household income), geographic accessibility (facilities within 1.6 km of home), and mobility options (access to Boys & Girls Club bus).

CONCLUSIONS

This study found that a diverse population of children used the G5AP. To continue being successful, community-based physical activity interventions need to ensure that the intervention increases geographic, economic, and informational accessibility and provides mobility options that are available to the target population.

Participation and attitudes towards gambling in Ghanaian youth: an exploratory analysis of risk and protective factors

PURPOSE

There is little information on youth gambling in Ghana even though there is an unprecedented emergence of various types of gambling and gambling venues throughout the country. The aim of this cross-sectional exploratory study was to examine the role of perceived social difficulties and perceived protective social factors in participation and attitudes of Ghanaian youth towards gambling using data from a school-based survey (n = 770).

METHODS

Participants completed measures on perceived social difficulties, perceived protective social factors, attitudes towards gambling and participation in four types of gambling.

RESULTS

Sports betting was the most common form of gambling. There were significant differences in gambling participation with males gambling more than females. Youth who reported more perceived social difficulties from family and friends had a more positive attitude and a negative attitude towards gambling, respectively. Youth who reported higher protective social factors from family and teachers were less likely to have a negative attitude towards gambling. In all situations, high frequency gambling resulted in a more positive attitude towards gambling.

CONCLUSION

Perceived social difficulties influences Ghanaian youths to have a positive attitude towards gambling, however, protective social factors from family and teachers may help youth to have a negative attitude towards gambling, gamble less and consequently achieve academic success.

Exploring the effect of parental influence on children's physical activity: The mediating role of children's perceptions of parental support

The purpose of this study was to test a conceptual model linking parental support and parental physical activity (PA), with children's perception of parental support and children's PA. Baseline data were drawn from the Grade 5 ACT-i-Pass community-based PA intervention conducted in London, Ontario between May and October 2014. Parent and child PA were measured using the International Physical Activity Questionnaire and Physical Activity Questionnaire for Children, respectively. Questions pertaining to parental support and children's perception of that parental support were obtained via questionnaires. We employed structural equation modeling techniques to test the conceptual model. In total, 467 boys and 469 girls were included in the study. The model provided an acceptable model fit. Child's perception of parental support for PA had a positive effect on boys' (b=0.319) and girls' (b=0.326) PA. Parental PA was not significantly related to child's perception of parental support for PA. However, parent reported support for PA had a significant, positive effect on child's perception of parental support for boys (b=0.352) and girls (b=0.584). In terms of the indirect effects, the effect of parental PA on child's PA was not statistically significant; however, as expected, parental support for PA had a statistically significant indirect effect on child PA level in both groups. The findings of this study demonstrate the importance of children's perceptions of parental support in relation to their PA behaviours. Developing a better understanding of factors related to children's PA and identifying determinants and mediators of activity behaviours will help inform PA interventions.

Sources and Types of Social Support for Physical Activity Perceived by Fifth to Eighth Grade Girls

BACKGROUND

Information is lacking on forms and sources of social support for physical activity (PA) received by adolescent girls during various pubertal stages. Two study purposes were to (a) identify the sources and forms of social support for PA perceived by adolescent girls, and (b) examine associations of pubertal stage and social support with PA.

METHODS

A secondary analysis of data from a randomized trial was conducted. Fifth through eighth grade girls (N = 1,519) completed surveys on social support for PA and pubertal stage and wore an accelerometer.

RESULTS

Girls in early-middle and late-post puberty most frequently received social support from their mothers. A higher proportion of girls in late-post puberty, compared to early-middle puberty, received social support from nonfamily adults (4.2% vs. 3.0%, p = .019). Girls identifying three sources participated in more moderate-to-vigorous PA than those having fewer sources (t_1,512 = -3.57, p < .001). Various forms of social support, except for encouragement, were positively related to moderate-to-vigorous PA. Girls in early-middle puberty reported greater social support than those in late-post puberty (t_1,512 = 3.99, p < .001). Social support was positively associated with moderate-to-vigorous PA, while girls in late-post puberty had lower moderate-to-vigorous PA than those in early-middle puberty.

CONCLUSIONS

Mothers are important sources of social support for PA. Having more than two sources may result in greater PA. Encouraging girls to increase their PA may not be sufficient.

CLINICAL RELEVANCE

Efforts are needed from health professionals to prevent any decline in social support for PA as girls advance across adolescence.

Correlates of Social Support and its Association With Physical Activity Among Young Adolescents

BACKGROUND

A substantial proportion of adolescents, particularly girls and minority youth, fail to meet daily physical activity (PA) recommendations. Social support contributes to adolescent PA, but studies examining this relationship have yielded inconsistent results and rarely focus on diverse, urban populations.

AIMS

This study examines the correlates of support for PA from family and friends and its relationship with PA outcomes among young adolescents.

METHODS

Data were collected in a cross-sectional survey of 4,773 middle school students. Social support from family and friends was separately measured using the Sallis Support for Exercise Scales. Hierarchical logistic regression models were used to assess correlates of high support and the relationship between support and self-reported PA.

RESULTS

Approximately one quarter of students reported being active for at least an hour each day. 31.7% of students reported high family support for PA, while 17.8% reported high friend support. Differences in perceptions of support by gender, ethnicity, and language emerged. Support from family and friends were both consistently strong predictors of all three PA outcomes measured.

DISCUSSION

Findings highlight the need for multilevel interventions targeting both psychosocial influences on behavior in addition to addressing the physical environment. Given low rates of friend support for PA, there appears to be an opportunity to increase PA levels through promotion of supportive behaviors among peers.

CONCLUSION

Support for PA from family and friends is a key contributor to increased PA among adolescents. Further research is needed to further understand the mechanisms by which these factors influence PA.

Psychosocial Variables Related to Why Women are Less Active than Men and Related Health Implications

This article reviews psychosocial influences on women’s participation in physical activity as they differ from men and how associated activity differences impact women’s risk for a number of chronic diseases. This topic directly aligns with the mission of this special edition related to disparities in women’s health as the typically lower level of physical activity in females directly impacts their health. On average, females participate in physical activity at lower rates than their male counterparts. These lower rates of physical activity are directly related to both incidence of and outcomes from cardiovascular disease, type 2 diabetes, and breast and gynecological cancers. The relationship between psychosocial factors that are understood to affect physical activity differs between men and women. Specifically, self-efficacy, social support, and motivation are empirically substantiated factors that found to impact physical activity participation among women differently than men. Understanding these relationships is integral to designing effective interventions to target physical activity participation in women so that the related health risks are adequately addressed.

The relation of socio-ecological factors to adolescents’ health-related behaviour

Purpose

– The purpose of this paper is to identify and describe adolescents’ health-related behaviours from a socio-ecological perspective. Socio-ecological factors have been widely shown to be related to health behaviours (smoking, alcohol consumption, physical activity and diet) in adolescence and to affect health. The review integrates evidence with socio-ecological factors (social relationships, family, peers, schooling and environment).

Design/methodology/approach

– The data were collected from electronic databases and by manual search consisting of articles (n=90) published during 2002-2014. The selected articles were analysed using inductive content analysis and narrative synthesis.

Findings

– The findings suggest that there was a complex set of relations connected to adolescent health behaviours, also encompassing socio-ecological factors. The authors tentatively conclude that socio-ecological circumstances influence adolescents’ health-related behaviour, but that this review does not provide the full picture. There seemed to be certain key factors with a relation to behavioural outcomes that might increase health inequality among adolescents.

Practical implications

– School health education is an important pathway for interventions to reduce unhealthy behaviours among adolescents including those related to socio-ecological factors.

Originality/value

– Some socio-ecological factors were strongly related to health behaviours in adolescence, which may indicate an important pathway to current and future health. This paper may help schoolteachers, nurses and other school staff to understand the relationships between socio-ecological factors and health-related behaviours, which may be useful in developing health education to reduce health disparities during adolescence.

The ACT-i-Pass study protocol: How does free access to recreation opportunities impact children's physical activity levels?

BACKGROUND

Physical activity during childhood is associated with a multitude of physical, behavioural, and psychological health benefits. Identification of effective population level strategies for increasing children's physical activity levels is critical for improving the overall health of Canadians. The overall objective of this study is to assess how a naturally-occurring, community-level intervention which offers Grade 5 children in London, Canada a free access pass to physical activity opportunities (facilities and programs) for an entire school year can lead to increased physical activity among recipients.

METHODS/DESIGN

This study adopts a longitudinal cohort study design to assess the effectiveness of improving children's access to physical activity opportunities for increasing their physical activity levels. To meet our overall objective we have three aims: (1) to assess whether the provision of free access increases children's physical activity levels during and after the intervention compared to a control group; (2) to assess how and why child-specific trajectories of physical activity (between-children differences in level of physical activity measured across time) in the intervention group differ according to children's individual and household characteristics; and (3) to explore additional factors that are unaccounted for in the theoretical model to gain a further understanding of why the free access intervention had varying effects on changing physical activity levels. We will be addressing these aims using a mixed methods approach, including: a series of youth surveys conducted before, during, immediately after, and 4-months after the intervention; parent surveys before, during, and post-intervention; real-time tracking of the access pass use during the intervention; and focus groups at the conclusion of the intervention. Data compiled from the youth surveys will provide a subjective measure of physical activity to be used as our outcome measure to address our primary aims.

DISCUSSION

The results of this study can inform policy- and decision-makers about the sub-groups of the population that benefitted the most (or least) from the intervention to provide more specific information on how to develop and target future interventions to have a greater impact on the physical activity levels and overall health of children.

Exploring Ghanaian adolescents' meaning of health and wellbeing: a psychosocial perspective

There is presently no internationally agreed upon set of indicators for assessing adolescent health and what "health and wellbeing" means to adolescents. The psychosocial context of family, friends, and school plays a crucial role in the construction of health and wellbeing by adolescents. In spite of this, not much is known about the meaning Ghanaian adolescents attach to their health and wellbeing and the role of stress and social support in the construction of this meaning. This study explores how perceived social support and stress influence the construction of the meaning of health and wellbeing to Ghanaian adolescents. Eleven respondents purposively selected from 770 males and females participated in semi-structured interviews, which were transcribed verbatim and analysed with thematic analysis. Findings pointed to the fact that health and wellbeing was largely construed as "ability to perform daily functions," such as ability to take critical decisions and a general sense of vitality and mental strength. These were influenced by perceived social support ("encouragement and advice" and "religiosity or spirituality") and stress ("teasing, strictness, quarrels, and arguments"). These findings suggest that effective communication, mutual respect, and support from significant others, in the midst of stressful life events, contribute substantially to a holistic construction and meaning of health and wellbeing by Ghanaian adolescents.

A longitudinal study of the effects of instrumental and emotional social support on physical activity in underserved adolescents in the ACT trial

BACKGROUND

Few previous studies have examined the influence of instrumental and emotional social support on physical activity (PA) longitudinally in underserved adolescents.

PURPOSE

This longitudinal study was a secondary analysis of the Active by Choice Today (ACT) trial examining whether instrumental social support predicts increases in PA in underserved adolescents, above and beyond emotional social support provided by family or peers.

METHODS

Students in the sixth grade (N = 1,422, 73 % African American, 54 % female, M age = 11 years) in the ACT trial participated. At baseline and 19 weeks, previously validated measures of social support (family instrumental, family emotional, and peer emotional) were completed and moderate-to-vigorous PA (MVPA) was assessed using 7-day accelerometry estimates.

RESULTS

A mixed ANCOVA demonstrated that baseline (p = 0.02) and change in family instrumental support (p = 0.01), but not emotional support from family or peers, predicted increases in MVPA across a 19-week period.

CONCLUSIONS

Future interventions in underserved adolescents should enhance opportunities for instrumental support for PA.

Demographic, cognitive, affective, and behavioral variables associated with overweight and obesity in low-active girls

This study examined personal, cognitive, affective, and behavioral variables related to body mass index (BMI) among 73 6th and 7th grade girls, and differences between categories of healthy weight, overweight, and obese in the variables. BMI was correlated with barriers to physical activity, enjoyment of physical activity, light physical activity, moderate to vigorous physical activity, vigorous physical activity, and sedentary time. As compared to obese girls, those who were non-obese perceived greater enjoyment of physical activity, engaged in more light and vigorous physical activity, and had fewer minutes/hour of sedentary time. Findings can inform interventions.

Social support and peer norms scales for physical activity in adolescents

OBJECTIVES

To evaluate psychometric properties of a Social Support and Peer Norms Scale in 5th-7th grade urban girls.

METHODS

Baseline data from 509 girls and test-retest data from another 94 girls in the Midwestern US were used.

RESULTS

Cronbach's alpha was .83 for the Social Support Scale and .72 for the Peer Norms Scale, whereas test-re-test reliability was .78 for both scales. Exploratory factor analysis suggested a single factor structure for the Social Support Scale, and a 3-factor structure for the Peer Norms Scale. Social support was correlated with accelerometer-measured physical activity (r = .13, p = .006), and peer norms (r = .50, p < .0001).

CONCLUSIONS

Both scales have adequate psychometric properties.

Physical activity and social support in adolescents: a systematic review

The objective of this review was to systematically synthesize the results of original studies on the association between physical activity and social support in adolescents, published until April 2011. Searches were carried out in Adolec, Eric, Lilacs, Medline, SciELO, Scopus, SportsDiscus and Web of Science electronic databases and the reference lists of selected articles. Searches for articles, data extraction and assessment of methodological quality were conducted independently by two reviewers. In total, 75 articles met inclusion criteria and were analyzed. Most studies were published over the past 6 years (2006-11), conducted in high-income countries, with a cross-sectional design, using subjective measures of physical activity (e.g. questionnaires and recall) and exhibited medium to high methodological quality level. Social support was positive and consistently associated with the physical activity level of adolescents in cross-sectional and longitudinal studies. Those who received more overall social support as well as support from both parents, friends and family showed higher levels of physical activity. It is concluded that social support is an important factor associated with physical activity level in adolescents and should be targeted in intervention programs that aim to increase physical activity levels in this population group.

Perceived social support and parental education as determinants of adolescents' physical activity and eating behaviour: a cross-sectional survey

PURPOSE

To examine the role of perceived social support and parental education on physical activity and eating behaviour of Ghanaian adolescents.

METHODS

Seven hundred and seventy Senior High School students (504 boys and 266 girls) between the ages of 14-21 years participated by completing questionnaires on perceived social support, physical activity and eating behaviour. The highest education attained by either parent or guardian was also obtained. Multivariate analysis of covariance was the main statistical test used to analyse the data.

RESULTS

The results showed significant gender differences in physical activity and eating behaviour combined, with boys more likely to engage in physical activity than girls, and girls also more likely to engage in healthy eating behaviour than boys, albeit the effect was not statistically significant. While perceived social support had a significant positive effect on eating behaviour and physical activity, parental education had a significant effect only on eating behaviour but not physical activity.

CONCLUSION

Perceived social support from family coupled with parental education provides more opportunities for adolescents to engage in healthy eating behaviour. Also, parents' educational attainment alone does not necessarily guarantee that adolescents will engage in physical activity; providing the needed social support and conducive home environment is more likely to induce physical activity behaviours. Finally, physical activity and eating behaviour should not be construed as alternative health behaviours as suggested by gender differentials in these health behaviours.

Process evaluation for a school-based physical activity intervention for 6th- and 7th-grade boys: reach, dose, and fidelity

The purpose was to evaluate the reach, dose, and fidelity of Guys Only Activity for Life (G.O.A.L.), a 7-week pilot intervention conducted from February to March 2011 to increase 6th and 7th grade boys' moderate-to-vigorous physical activity (MVPA). One middle school was randomly assigned to the G.O.A.L. intervention and another from the same urban school district in the Midwestern U.S. to a comparison condition. Thirty boys, ages 10-14 years, participated in each school. The intervention, guided by the Health Promotion Model (HPM) and Self-Determination Theory (SDT), consisted of a 90-min after-school physical activity club 4 days/week and one motivational interviewing session with a registered (school) nurse. Data were gathered via attendance records, club observations, heart rate monitors, audio-taping of motivational interviewing sessions, and surveys. On average boys attended the club 2.11 days/week (SD=.86). A trained independent process evaluator reported that the physical activity club instructors provided the boys with the opportunity for a mean of 25.8 min/day of MVPA. Using a four-point Likert scale (1=disagree a lot; 4=agree a lot), the process evaluator perceived that the club was delivered with high fidelity and adherence to the underlying theories (M=3.48; SD=0.39). Sessions with the nurse lasted an average of 13 min, 29 s. All boys attended. Two trained independent coders indicated that the nurse demonstrated at least beginning proficiency for all tasks associated with motivational interviewing, with the exception of using sufficient open- as opposed to closed-ended questions and reflections compared to questions. Fidelity related to session delivery and adherence to the theories was high (M=3.83; SD=0.19). The process evaluation data indicated that strategies are needed to increase attendance and boys' MVPA during the club time.

Physical activity in adolescents: analysis of the social influence of parents and friends

OBJECTIVE

To analyze the association between physical activity and social support from parents and friends on the physical activity level among adolescents.

METHODS

Data from 2,361 adolescents (56.6% females; mean age 16.4; SD = 1.2), from public and private high schools were analyzed. The physical activity level of the adolescents, parents, and friends were measured through a questionnaire. Parents' and friends' support and self-efficacy were measured using two previously tested scales. Data analysis was performed using the structural equation modeling in IBM® SPSS® Amos™ 20.0.

RESULTS

Physical activity of friends was directly associated with physical activity level of adolescents. Physical activity of the father was associated with that of their sons, and the physical activity of mother was associated with that of their daughters. An indirect association was identified between the physical activity of parents and friends with physical activity level of the adolescents, mediated by social support. Social support was directly associated with physical activity in adolescents of both genders and indirectly mediated by self-efficacy.

CONCLUSIONS

Parents and friends have a social influence on adolescents' level of physical activity through the mechanism of behavior modeling or through social support, mediated by self-efficacy.

Measurement of general and specific approaches to physical activity parenting: a systematic review

BACKGROUND

Parents play a significant role in shaping youth physical activity (PA). However, interventions targeting PA parenting have been ineffective. Methodological inconsistencies related to the measurement of parental influences may be a contributing factor. The purpose of this article is to review the extant peer-reviewed literature related to the measurement of general and specific parental influences on youth PA.

METHODS

A systematic review of studies measuring constructs of PA parenting was conducted. Computerized searches were completed using PubMed, MEDLINE, Academic Search Premier, SPORTDiscus, and PsycINFO. Reference lists of the identified articles were manually reviewed as well as the authors' personal collections. Articles were selected on the basis of strict inclusion criteria and details regarding the measurement protocols were extracted. A total of 117 articles met the inclusionary criteria. Methodological articles that evaluated the validity and reliability of PA parenting measures (n=10) were reviewed separately from parental influence articles (n=107).

RESULTS

A significant percentage of studies used measures with indeterminate validity and reliability. A significant percentage of articles did not provide sample items, describe the response format, or report the possible range of scores. No studies were located that evaluated sensitivity to change.

CONCLUSION

The reporting of measurement properties and the use of valid and reliable measurement scales need to be improved considerably.

"Girls on the Move" intervention protocol for increasing physical activity among low-active underserved urban girls: a group randomized trial

BACKGROUND

Increasing moderate to vigorous physical activity among urban girls of low socioeconomic status is both a challenge and a public health priority. Physical activity interventions targeting exclusively girls remain limited, and maintenance of moderate to vigorous physical activity during the post-intervention period has been difficult to maintain. The main aim of the 5-year "Girls on the Move" group randomized trial is to evaluate the efficacy of a comprehensive school-based intervention in increasing girls' minutes of moderate to vigorous physical activity and improving cardiovascular fitness, body mass index, and percent body fat immediately post-intervention (after 17 weeks) and at 9-month post-intervention follow-up (9 months after end of intervention).

METHODS/DESIGN

A total of 24 urban middle schools in the Midwestern U.S. will be randomized to either receive the intervention or serve as a control (N = 1200 girls). The intervention, based on the Health Promotion Model and Self-Determination Theory, will include: (1) two face-to-face motivational, individually tailored counseling sessions with a registered nurse, one at the beginning and the other at the end of the intervention period; (2) an interactive Internet-based session during which each girl receives individually tailored motivational and feedback messages via iPad at 11 weeks (shortly after midpoint of intervention); and (3) a 90-minute after-school physical activity club. Racially diverse, low-active, 10- to 14-year-old 5th to 8th-grade girls will complete questionnaires and physical measures at baseline and post-intervention (n = 50 per school). Minutes of moderate to vigorous physical activity will be assessed with accelerometers. Cardiovascular fitness will be assessed by estimating VO2 max with PACER (Progressive Aerobic Cardiovascular Endurance Run) scores. Height and weight will be assessed to calculate body mass index. Percent body fat will be estimated with a foot-to-foot bioelectric impedance scale. Linear mixed effects regression analyses will be performed to assess intervention effects.

DISCUSSION

This multi-component approach is expected to improve girls' moderate to vigorous physical activity and related physical outcomes.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier NCT01503333.

Correlates of physical activity in adolescence: a study from a developing country

BACKGROUND

Physical activity is important for adolescent health. The current study aimed to explore factors that predict physical activity among adolescents.

METHODS

This was a cross-sectional study of physical activity among a sample of adolescents in Tabriz, Iran. Information on physical activity was collected using a modified version of the Adolescent Physical Activity and Recall Questionnaire (APARQ). In addition, a self-administrated questionnaire was used to collect data on demographic characteristics, perceived family support, and self-efficacy. Both univariate and multivariate logistic regression analyses were performed to examine the association between physical activity and independent variables including gender and psychosocial predictors.

RESULTS

In all, 402 students were studied. The mean age of adolescents was 12.93 (SD=0.49) years; 51.5% were female. The mean time of moderate and vigorous physical activity for all adolescents was 44.64 (SD=23.24) Metabolic Equivalent (MET) min per day. This figure for female adolescents was 38.77 (SD=19.94) MET min per day and for males it was 50.87 (SD=24.88) (P<0.001). The results obtained from multiple logistic regression analysis indicated that female gender (OR=2.59, 95% CI=1.46-4.57, P=0.001) and poor family support (OR=1.10, 95% CI=1.03-1.20, P=0.038) were the most significant contributing factors to low level physical activity in adolescents. Other variables studied did not show any significant results.

CONCLUSION

The findings from the current study indicated that female adolescents were at risk of lower level of physical activity. In addition, it was found that the lack of family support represented an increased risk for low-level physical activity. It seems that family support should be an integrated part of any health education/promotion programs for improving physical activity among young adolescents in general and for female adolescents in particular.

Specific types of family support and adolescent non-school physical activity levels

In a sample of 291 adolescents (mean age 13 yr), seven psychosocial factors, including family support, were examined in relation to accelerometry-derived physical activity (PA) measured after school and during the weekend. Gender-specific stepwise linear regression analyses determined which combinations of factors explained the variance in nonschool moderate to vigorous PA and nonschool total PA after adjusting for % BF, age, and maturity (p ≤ 0.05). Being praised by a family member and % BF explained 13% of the variance in female nonschool MVPA, while being praised and maturity explained 13% of the variance in nonschool total PA. Having a family member watch him participate, % BF, and age explained 11.5% of the variance in male nonschool MVPA, while having a family member participate with him explained 6.4% of the variance in nonschool total PA. Despite adolescents' growing independence, family support continues to influence PA levels.

The importance of parental beliefs and support for physical activity and body weights of children: a population-based analysis

OBJECTIVE

To determine whether parental beliefs and support for physical activity (PA) are associated with normal-weight and overweight children's self-reported PA and body weight using a population-based approach.

METHODS

We analyzed cross-sectional survey data from 6,585 students and their parents in Alberta, Canada, collected in 2008 and 2010. Parental beliefs and support were collected through questions on "care about staying fit", "encourage PA" and "engage in PA with their child". Children's PA was self-reported. Body mass index was calculated from measured height and weight. We applied random effects models to assess: 1) the association of parental beliefs and support with children's PA; 2) differences in the associations for normal-weight and overweight children; 3) the association of parental beliefs and support with overweight.

RESULTS

Parental care, encouragement, and engagement in PA were independently and positively associated with PA among both normal-weight and overweight children. Relative to children whose parents encouraged them "quite a lot", those whose parents encouraged them "very much" were 22% less likely to be overweight (OR=0.78, 95% CI: 0.68-0.89).

CONCLUSION

Health promotion strategies that target parents to encourage and engage in PA with their children may increase activity levels and reduce overweight among children.

Pilot intervention to increase physical activity among sedentary urban middle school girls: a two-group pretest-posttest quasi-experimental design

The primary purpose of the study was to determine whether girls in one school receiving nurse counseling plus an after-school physical activity club showed greater improvement in physical activity, cardiovascular fitness, and body composition than girls assigned to an attention control condition in another school (N = 69). Linear regressions controlling for baseline measures showed no statistically significant group differences, but the directionality of differences was consistent with greater intervention group improvement for minutes of moderate to vigorous physical activity/hour (t = 0.95, p = .35), cardiovascular fitness (t = 1.26, p = .22), body mass index (BMI; t = -1.47, p = .15), BMI z score (t = -1.19, p = .24), BMI percentile (t = -0.59, p = .56), percentage body fat (t = -0.86, p = .39), and waist circumference (t = -0.19, p = .85). Findings support testing with a larger sample.

Treatment fidelity of motivational interviewing delivered by a school nurse to increase girls' physical activity

Motivational interviewing, which involves the use of person-centered, directive counseling techniques, shows promise for changing adolescent behaviors. The purpose of this article was to describe the methodology and findings related to the treatment fidelity of three face-to-face motivational interviewing sessions involving middle school girls and a school nurse to help the girls increase their moderate-to-vigorous physical activity. The following four areas related to treatment fidelity were addressed: (a) study design, (b) training of interventionists, (c) intervention delivery, and (d) intervention receipt. Findings showed that 34 of 37 (91.9%) girls completed all three sessions. An initial motivational interviewing training workshop followed by evaluation of audiotaped sessions with constructive feedback can result in successful and consistent delivery by a school nurse.

Parental Influences on Physical Activity Behavior in Children and Adolescents: A Brief Review

Understanding the social and environmental factors that influence physical activity is important in the development of effective interventions to increase physical activity behavior in children and adolescents. One factor that has received considerable research attention is the influence of parenting practices and behaviors on child physical activity. This review evaluated 103 studies that examined the influence of parental physical activity, parental support for child physical activity, parenting style, and family cohesion on child and adolescent activity behavior. Results showed that parental support was consistently positively and significantly associated with child activity. With respect to the association between parent and child physical activity, there was little evidence of association. Although the evidence linking parenting style and family cohesion with child physical activity was nonsupportive, too few studies have examined these relationships to draw firm conclusions. Priorities for future research and implications for health care professionals are discussed.

Computer- and web-based interventions to increase preadolescent and adolescent physical activity: a systematic review

AIM

This review examined evidence regarding computer- or web-based interventions to increase preadolescent and adolescent physical activity.

BACKGROUND

Today's youth are less active and more overweight than their counterparts from 25 years ago. Overweight youth tend to become overweight adults with weight-related maladies, including type 2 diabetes and cardiovascular problems. Interventions to increase physical activity that reach a large audience are needed. Computer- and web-based physical activity interventions are an appealing means to influence physical activity in preadolescents and adolescents. However, their effectiveness must be determined.

DATA SOURCES

The following electronic databases were searched for studies published from 1998 through 2010: CINAHL, PubMed, PsycINFO, Sociological Abstracts, SportDISCUS and Proquest.

REVIEW METHODS

A systemic review was conducted. Fourteen randomized control trials or quasi-experimental studies were reviewed to: (1) determine the effect of computer- or web-based interventions on increasing physical activity and/or improving body mass index, weight, percent body fat or waist circumference as a result of increasing physical activity; and (2) examine if additional components associated with these interventions increased success.

RESULTS

  Although most interventions demonstrated statistically significant increases in physical activity or positive health changes related to physical activity, findings were small or short-lived. The value of conducting the interventions at school, using a theory or model as a framework, and supplementing with individual tailoring and parental involvement, is discussed.

CONCLUSION

Computer- and web-based interventions can promote physical activity among preadolescents and adolescents, particularly in schools. However, further efforts are needed to sustain positive changes.

Adolescents' sports and exercise environments in a U.S. time use survey

BACKGROUND

Studies examining environmental influences on adolescent physical activity largely measure the presence and availability of social resources and built environment facilities. Unfortunately, this research approach provides limited information about adolescents' social company during exercise or the extent to which adolescents actually use physical settings for physical activity.

PURPOSE

The current study used data from the nationally representative American Time Use Survey (2003-2006) to describe demographic and temporal patterns in the social and physical contexts of physical activity among adolescents.

METHODS

The sample consisted of high school students (aged 15-18 years) reporting at least one bout of sports or exercise (N=867). During the interview, participants reported where (e.g., outdoors, home, work) and with whom (e.g., alone, family, friends) each bout occurred. Sample-weighted multinomial logistic regression analyses compared the proportion of bouts occurring in each environment by age, gender, family income, season, weekend/weekday, and time of day, controlling for race/ethnicity. Data were analyzed in 2009.

RESULTS

Girls were more likely to exercise with family (22% vs 16%), and less likely to exercise with friends/acquaintances/others (47% vs 52%) and outdoors (18% vs 24%) than boys. Compared with those aged 15 years, a larger proportion of exercise bouts among those aged 18 years occurred alone (23% vs 18%); and a smaller proportion occurred at home (14% vs 20%), at someone else's house (5% vs 12%), and at school (14% vs 27%) (p's<0.001).

CONCLUSIONS

Information about the social and physical contexts of adolescents' sports and exercise can help guide the selection of future environmental targets for investigation and intervention.