Participation In Leisure-time Physical Activity Research Articles

Leisure time physical activity participation among Latino visitors to outdoor recreation areas

Previous research indicates that Latinos have low rates of leisure time physical activity (LTPA). As a result, Latinos suffer from higher rates of obesity and other diseases associated with this lack of activity. Thus, the primary purpose of this exploratory study was to gain a greater understanding of LTPA among Latinos. The goals of this study were threefold: (1) gain an understanding of the similarities and differences between Latino male and female LTPA levels and their levels of walking (done in a variety of settings); (2) examine the types of environments where their LTPA occurs; and (3) gain insight into Latinos’ attitudes and perceptions of social support and constraints to LTPA. The study included Latinos from two suburban Chicago communities. Data were collected at local parks and in a sports complex. The findings indicated that 39.1% of the Latinos had engaged in vigorous LTPA 2.75 days in the previous week, and men were active for longer periods of time than were women (F = 6.47; p = 0.021). Additionally, 38.6% of the Latinos had engaged in moderate LTPA an average of 2.57 days in a week. The majority of participants indicated they walked at least 10 minutes per day (77.5%), and men spent significantly more time walking than did women (F = 47.17; p = 0.001). Men were more likely to exercise in parks whereas women were more likely to exercise at home. Most Latinos indicated high levels of social support for exercise, and men found LTPA more interesting than did women (F = 4.23; p = 0.040). The top constraint for women was lack of childcare and for men it was too tired after work. Consistent with previous findings, a large proportion of respondents were totally inactive and did not participate in moderate or vigorous LTPA. Findings indicated that men and women experienced constraints differently, but that for both groups constraints led to lower LTPA.

P1-348 Leisure-time physical activity and breast cancer risk defined by oestrogen and progesterone receptor status: the Japan public health center-based prospective study

ObjectiveTo investigate the association between leisure-time physical activity (LPA) and breast cancer risk in consideration of tumour oestrogen/progesterone-receptor (ER/PR) status.MethodsWe conducted a population-based prospective cohort study among 53 578 women...

Adolescent physical fitness and activity as predictors of adulthood activity

A 25-year population-based study was conducted to determine how physical fitness and participation in leisure-time physical activity in adolescence (age 12–18 years) predict leisure-time physical activity in adulthood (age 37–43 years). In 1976, five field tests were conducted to measure muscular fitness, agility and aerobic capacity, and self-report weekly frequencies of activity were obtained by questionnaire. A modified questionnaire was repeated in 2001, when participants were age 37–43 years (N = 1525). On the basis of the questionnaire, a physical activity index was calculated both in 1976 and 2001. The odds ratios (OR) for being inactive in adulthood among those who were physically very active in adolescence compared with those who were inactive in adolescence was 0.13 for males (95%CI: 0.06–0.31) and 0.28 for females (95%CI: 0.13–0.59). The odds ratio for adult inactivity among males in the highest versus lowest fitness group in adolescence was 0.24 (95%CI: 0.07–0.81). Activity in adolescence predicted activity in adulthood in both males and females. The risk for adult inactivity was significantly lower for those who were physically active in adolescence. In addition, high fitness predicted adult activity among males but not among females.

The Correlates of Leisure Time Physical Activity among an Adults Population from Southern Taiwan

BackgroundAssessing the correlates of practicing physical activity during leisure time is important with regard to planning and designing public health strategies to increase beneficial behaviors among adult populations. Although the importance of leisure time physical activity (LTPA) is highlighted in many Western countries, there are not many publications on physical activity patterns, and even less on their correlates, in non-Western societies. The goal of this study was thus to explore the determinants influencing adults' leisure time physical activity (LTPA) in a city in southern Taiwan.MethodsA cross-sectional population-based study was conducted in 2007, using a standardized questionnaire. Energy expenditure was dichotomized into two groups based on the recommended levels of moderate physical activity from LTPA: ≥10 or < 10 MET·hr·wk-1. Logistic regression analyses were applied to the results.ResultsA total of 762 subjects with valid data took part in the study (mean age 53.8 ± 13.8 years). In multivariate logistic regression analysis, we found the following results: Age was positively associated with LTPA. Adults with stronger perceived convenience of exercise facilities (OR = 2.04; 95%CI = 1.28-3.24) and past exercise experience in school (OR = 1.86; 95%CI= 1.19-2.91) participated in more LTPA. Subjects with more general social support (OR = 1.66;95%CI = 1.13-2.44), greater knowledge about the health benefits of exercise (OR = 1.85;95%CI = 1.25-2.74), more sports media consumption (OR = 1.94;95%CI = 1.26-2.98), and higher self-efficacy (OR = 3.99;95%CI = 2.67-5.97) were more likely to engage in LTPA. Further analysis comparing different sources of social support showed only social support from friends had a significant positive association (OR = 1.73;95%CI = 1.14-2.63) with increased LTPA.ConclusionsLTPA in southern city of Taiwan showed some unique associations with age, socioeconomic status and media consumption that are not commonly reported in the Western World and similar associations with regards to psychosocial correlates of LTPA participation. Further studies from developing countries are warranted to highlight culture-specific differences in physical activity participation.

Atividades físicas e barreiras referidas por adolescentes atendidos num serviço de saúde. DOI: 10.5007/1980-0037.2011v13n3p163

This study characterized the physical activity and barriers reported by adolescents attending the Physical Education service of the Adolescent Care and Support Center, São Paulo, Brazil. An exploratory study was conducted using anamnesis data from118 adolescents aged 10 to 19 years seen between April 2005 and June 2008. The following aspects were analyzed according to gender and age group: participation in leisure-time physical activities and physical education classes, physical activity preferences, and barriers to preferred physical activity. Data are reported as frequencies and were compared by Fisher’s exact test. Enjoying physical activities was reported by 93.2% of the adolescents, whereas 50.8% did not perform any physical activity during their leisure time. The lack of participation in school physical education classes predominated among older adolescents of both genders. Games and team games were the preferred activities, irrespective of gender or age. The lack of company or friends and the lack of places were the most frequently reported barriers to preferred physical activity. The results highlight the importance of a health service program for adolescents that promotes, guides, and supports a more active lifestyle.

Leisure-time physical activity and breast cancer risk defined by estrogen and progesterone receptor status—The Japan Public Health Center-based Prospective Study

Objective. The study aims to investigate the association between leisure-time physical activity and breast cancer risk in consideration of tumor estrogen-receptor/progesterone-receptor status. Methods. We conducted a population-based prospective cohort study among 53,578 women in the Japan Public Health Center-based Prospective Study. Leisure-time physical activity was assessed by self-reported questionnaires. A Cox proportional hazards regression model was used to derive relative risks and 95% confidence intervals. Results. From 1990–1993 to the end of 2007, 652 cases were identified. The breast cancer rates (per 100,000 person-years) in the sedentary groups (≤ 3 days/month) was 84 in overall, 97 in premenopausal and 75 in postmenopausal women. We observed a statistically significant inverse association between leisure-time physical activity and breast cancer risk (relative risk ≥ 3 days/week vs. ≤ 3 days/month = 0.73; 95% confidence interval 0.54–1.00; p trend 0.037), particularly in estrogen receptor+progesterone receptor+ (relative risk 0.43; 0.19–1.00; p trend 0.022), and this inverse trend was apparent among postmenopausal women (relative risk 0.25; 0.06–1.06; p trend 0.041). An inverse trend was also observed between daily total physical activity and postmenopausal estrogen receptor+progesterone receptor+ risk ( p = 0.046). Among body mass index ≥ 25 kg/m 2 group, leisure-time physical activity was associated with decreased risk (relative risk ≥ 1 day/week vs. ≤ 3 days/month = 0.65; 0.43–0.97; p trend 0.033 ). Conclusion. Active participation in leisure-time physical activity may contribute to a decrease in breast cancer risk, particularly for postmenopausal estrogen receptor+progesterone receptor+ tumors.

The effect of mere-measurement of cognitions on physical activity behavior: a randomized controlled trial among overweight and obese individuals

BackgroundThe promotion of physical activity among an overweight/obese population is an important challenge for clinical practitioners and researchers. In this regard, completing a questionnaire on cognitions could be a simple and easy strategy to increase levels of physical activity. Thus, the aim of the present study was to test the effect of completing a questionnaire based on the Theory of Planned Behavior (TPB) on the level of physical activity.MethodsOverall, 452 overweight/obese adults were recruited and randomized to the experimental or control group. At baseline, participants completed a questionnaire on cognitions regarding their participation in leisure-time physical activity (experimental condition) versus a questionnaire on fruit and vegetable consumption (control condition). The questionnaires assessed the TPB variables that are beliefs, attitude, norm, perception of control, intention and a few additional variables from other theories. At three-month follow-up, leisure-time physical activity was self-reported by means of a short questionnaire. An analysis of covariance with baseline physical activity level as covariate was used to verify the effect of the intervention.ResultsAt follow-up, 373 participants completed the leisure-time physical activity questionnaire. The statistical analysis showed that physical activity participation was greater among participants in the experimental condition than those in the control condition (F(1,370) = 6.85, p = .009, d = 0.20).ConclusionsFindings indicate that completing a TPB questionnaire has a significant positive impact on subsequent participation in physical activity. Consequently, asking individuals to complete such a questionnaire is a simple, inexpensive and easy strategy to increase the level of physical activity among overweight/obese adults.

Physical Activity Levels by Occupational Category in Non-Metropolitan Australian Adults

The aim of this study was to examine the relationship between occupational category and 3 health-related behaviors: participation in leisure-time physical activity, active transport (AT) and occupational sitting in a sample of employed Australian adults. A random, cross-sectional sample of 592 adults aged 18 to 71 years completed a telephone survey in October/November 2006. Reported occupations were categorized as professional (n = 332, 56.1%), white-collar (n = 181, 30.6%), and blue-collar (n = 79, 13.3%). Relationships between occupational category and AT, sufficient physical activity and occupational sitting were examined using logistic regression. White-collar employees (OR = 0.36, 95% CI 0.14-0.95) were less likely to engage in AT and more likely to engage in occupational sitting (OR = 3.10, 95% CI 1.63-5.92) when compared with blue-collar workers. Professionals (OR = 3.04, 95% CI 1.94-4.76) were also more likely to engage in occupational sitting compared with blue-collar workers. No relationship was observed between occupational category and engagement in sufficient physical activity. No association between occupational category and sufficient physical activity levels was observed, although white-collar and professionals were likely to engage in high levels of occupational sitting. Innovative and sustainable strategies are required to reduce occupational sitting to improve health.

Recreational physical activities among children with a history of severe traumatic brain injury

Objective: To describe leisure time physical activity (LTPA) and physical capabilities such as balance, muscle strength and walking performance and to evaluate the associations between physical capabilities and LTPA among children post-traumatic brain injury (TBI) as compared to a peer group of typically-developed (TD) controls.Participants: Convenience sample of 15 children, 1.5–7 years post-severe TBI and 15 age- and sex-matched controls.Main outcome measures: LTPA by the Godin and Shephard (G&S) questionnaire. Balance tests—the Timed Up and Go test (TUG) and functional reach test (FRT). Maximal isometric strength was assessed by using a hand-held dynamometer; walking dynamics were recorded by an electronic mat and the 6 minute walk test and energy expenditure index (EEI). Perceived exertion was rated by the OMNI scale.Results: Children post-severe TBI participate significantly less in LTPA as compared to TD controls (p < 0.01). Walking performance was comparable between groups except for step length which was significantly shorter among children post-TBI. Hip extensor strength and balance performance were significantly lower among children post-TBI. Balance performance was positively associated with LTPA.Conclusions: This study suggests that attention should be directed towards improving balance performance as part of the training repertoire of children and adolescents with post-severe TBI. The efficacy of such a training programme, in particular its contribution to LTPA participation, should then be further assessed.

Performance in leisure-time physical activities and self-efficacy in females with rheumatoid arthritis

The purpose of this study was to examine leisure-time physical activities (LTPAs) and their association with self-efficacy in females with rheumatoid arthritis (RA) (n = 238). Their self-reported performance in LTPAs was measured by the Interest Checklist and efficacy beliefs by using the Arthritis Self-Efficacy Scales (ASES). LTPAs were classified as active or less active according to how many LTPAs they performed. The participants had reduced their participation in LTPAs by almost one-third during the last year. Active individuals performed the vigorous activities more often, they had a higher level of education, were working to a significantly greater extent, and reported better function, higher scores on the self-efficacy scales, and lower joint pain and fatigue. Multivariate analyses demonstrated that a high level of LTPAs was independently related to less fatigue (OR 0.98, p = 0.004), positive self-efficacy in coping with RA functions (OR 1.03, p = 0.015), and higher employment level (OR 0.42, p = 0.039). Only a quarter of the responders were physically active in their leisure time in the present study. Less active individuals reduced their performance in LTPAs to a much higher degree than active individuals during the last year. Partaking in a high amount of LTPAs was related to less fatigue and higher efficacy beliefs.

Secular trends in muscular fitness among Finnish adolescents

To investigate secular change over time in health-related muscular fitness and how leisure time physical activity (LTPA), sport club participation, and body mass index are associated with muscular fitness in adolescents. Two cross-sectional samples of Finnish 13-16-year-old adolescents were studied in 1976 (n = 643; 312 boys and 331 girls) and in 2001 (n = 579; 308 boys and 271 girls). Muscular fitness index was calculated as the sum of age- and sex-specific z-scores of four tests measuring muscular fitness and agility. Height and weight were also measured. Self-reported weekly frequency of LTPA of at least 30-min duration and regularity of participation in organised sport were obtained by questionnaire. Identical methods were used in 1976 and 2001. Muscular fitness index was higher in 2001 than in 1976 in both boys (by 0.77 points, p = 0.008, effect size d = 0.17, small difference) and girls (1.01 points, p = 0.004, d = 0.20, small difference). Sport club participation, body mass index, and participation in LTPA together explained more of the muscular fitness index variance in 2001 than in 1976 in both boys (coefficient of determination from 0.10 to 0.24) and girls (from 0.25 to 0.40). The muscular fitness of 13-16-year old adolescents slightly improved over time. Organised LTPA showed a stronger association with muscular fitness in 2001 than in 1976. Due to increased polarisation in fitness, in health promotion more attention should be paid on adolescents' health-related fitness and its association to LTPA.

Trend and Prevalence Estimates Based on the 2008 Physical Activity Guidelines for Americans

According to the 2008 Physical Activity Guidelines for Americans, adults need to engage in at least 150 minutes/week of moderate-intensity activity or its equivalent (defined as aerobically active) to obtain substantial health benefits and more than 300 minutes/week (defined as highly active) to obtain more extensive health benefits. In addition to aerobic activity, the 2008 Guidelines recommend that adults participate in muscle-strengthening activities on 2 or more days/week. This study examined the prevalence and trends of meeting the activity criteria defined by the 2008 Guidelines among U.S. adults. Prevalence and trends of participation in leisure-time physical activity were estimated from the 1998-2008 National Health Interview Survey (analyzed in 2010). In 2008, 43.5% of U.S. adults were aerobically active, 28.4% were highly active, 21.9% met the muscle-strengthening guideline, and 18.2% both met the muscle-strengthening guideline and were aerobically active. The likelihood of meeting each of these four activity criteria was similar and were associated with being male, being younger, being non-Hispanic white, having higher levels of education, and having a lower BMI. Trends over time were also similar for each part of the 2008 Guidelines, with the prevalence of participation exhibiting a small but significant increase when comparing 1998 to 2008 (difference ranging from 2.4 to 4.2 percentage points). Little progress has been made during the past 10 years in increasing physical activity levels in the U.S. There is much room for improvement in achieving recommended levels of physical activity among Americans, particularly among relatively inactive subgroups.

Pursuing Leisure During Leisure-Time Physical Activity

While considerable attention has been given to quantifying leisure-time physical activity (LTPA) among subpopulations, less attention has focused on the perception of the experience as leisure. The current study describes the prevalence of leisure-like experiences during LTPA among college students. We describe the social contexts and activity settings that contribute to participant enjoyment of LTPA since enjoyment has been linked to participation and adherence. Data were collected from 192 undergraduate students using a short questionnaire and 2 days of time diaries. Respondents spent nearly equal time working, sleeping, and engaged in discretionary activities. Students reported 512 minutes of discretionary time each day, of which 77 minutes were spent in LTPA and 68% was classified by respondents as leisure. Active sports/exercise (including aerobics and weight lifting), walking, and dancing at bars or parties were the most frequent LTPA choices. When LTPA involved the presence of human companions, activities were more likely to be perceived by respondents as leisure experiences. Physical activities undertaken at public parks, bars/dance clubs and private recreation centers were also more likely to be perceived as leisure experiences. Findings indicate that social instead of traditional exercise activities may motivate LTPA participation among college students. For example, results suggest the importance of dancing in this population.

Perceived Barriers to Leisure-Time Physical Activity in Adults: An Ecological Perspective

Perceived barriers are modifiable correlates of participation in physical activity. Associations of specific perceived barriers with participation in and level of walking for recreation, and other leisure-time physical activity (LTPA) were examined. Personal, social, and environmental factors associated with these perceived barriers were then examined. From 2003 to 2004, 2 surveys collected data on recreational walking and other LTPA, perceived barriers to participation, and personal, social, and environmental attributes, from 2194 Australian adults. Zero-inflated negative binomial regression models examined associations of perceived barriers with walking and other LTPA. Generalized linear models identified the correlates of these perceived barriers. The perceived barriers of lack of motivation and time were associated with level of LTPA, while lack of motivation, poor health, and lack of facilities were associated with the odds of nonparticipation in LTPA. Personal, social, and environmental factors independently contributed to variations in perceived barriers. Level and likelihood of participation in LTPA are associated with different perceived barriers. Perceived barriers are a function of both nonmodifiable personal factors and potentially modifiable personal, social, and environmental factors. These findings suggest that the provision of relevant environmental opportunities and social support may effectively reduce perceived barriers to LTPA.

Leisure-Time Physical Activity: Association With Activity Levels in Other Domains

To explore whether participation in leisure-time physical activity (LTPA) is associated with participation in occupational, housework, and transport-related physical activity. Population-based cross-sectional study covering a multistage sample of 972 subjects age 20 to 69 years. Physical activity was measured using the long version of the International Physical Activity Questionnaire. A LTPA score was calculated as follows: min/wk of walking + min/wk of moderate-intensity physical activity + (min/wk of vigorous-intensity physical activity x 2). Similar scores were generated for each domain. For categorical analyses, the scores were divided into 3 categories: 0 min/wk, 10-149 min/wk, and > or = 150 min/wk. The proportion of subjects practicing less than 150 min/wk of physical activity in each domain was: leisure-time (69.8%), occupational (58.3%), housework (35.0%), transportation (51.9%). Subjects with a transport-related physical activity score equal to or above 150 min/wk were 40% less likely to be sedentary in leisure-time in comparison with those who did not practice transport-related physical activity. Housework and occupational physical activity were not related to participation in LTPA. Future physical activity campaigns should focus on other domains instead of LTPA alone, particularly supporting transport-related physical activity as a strategy of health promotion.

Self-Determination Theory as a Framework for Understanding Women's Psychological Well-Being Outcomes from Leisure-Time Physical Activity

Self-determination theory (SDT) is used as a framework to understand how women's psychological well-being is influenced by participation in leisure-time physical activity and the social context in which activity occurs. Data were collected during in-depth semi-structured interviews with 20 participants and analyzed using constant comparison. Findings indicate women's well-being can be enhanced through casual participation in leisure-time physical activity if activity contexts support interaction between the elements of self-determination: competence, autonomy, and relatedness. Participant interactions during activities also play an important role in facilitating well-being outcomes. The findings qualitatively add to understanding and development of SDT as a legitimate psychological construct by explaining the key components of the theory through the participants own words and reflections.

Leisure Time and Occupational Physical Activity among Racial or Ethnic Minorities

One of the factors distinguishing non-Latino blacks (NLB) and Latinos from non-Latino whites (NLW) is higher rates of occupational physical activity (OPA) and less participation in leisure time physical activity (LTPA). We examined participation in OPA and LTPA among employed individuals and the relationship between OPA and LTPA across select racial or ethnic groups and Latino subgroups. We pooled data from 2000 to 2003 of the National Health Interview Survey. We divided the survey participants into three groups: 1) those with no LTPA, 2) those who reported some LTPA but not for sufficient time and intensity to meet recommended guidelines, and 3) those who reported LTPA at levels that met or exceeded recommendations. We used ordinal logistic regression to examine whether NLB and Latinos or Latino subgroups were less likely to report LTPA than NLW while controlling for social, economic, and demographic factors that may have accounted for group differences. We further examined the prevalence of OPA and the relationship between LTPA and OPA. Among employed individuals, NLB and Latinos had significantly more individuals reporting no LTPA compared with NLW. Latinos had the greatest proportion of individuals reporting no LTPA. Furthermore, it was found that significantly more Latinos had physically active occupations compared with NLB and NLB compared with NLW, respectively. Among employed Latinos, Cubans and Dominicans were most likely to report no LTPA, and Mexicans had the greatest percentage of workers with a physically active occupation. LTPA was not significantly associated with having a physically active occupation across races and Latino subgroups. Participation in LTPA among ethnic or racial minorities is lower than that of NLW, and the OPA rates are higher. OPA does not significantly impact participation in LTPA in employed adults.

Physical Activity, Academic Performance, And Physical Self-description In Adolescent Females

Despite the many health benefits of being physically active nearly a quarter of U.S. adults and adolescents report no participation in leisure-time physical activity. It is recommended that children and adolescents participate in physical activity for at least 60 minutes daily at moderate or vigorous intensity. In addition to potentially enhancing academic performance participation in physical activity may also influence perceptions of physical appearance and global self-esteem which tend to decrease with age in adolescent females. The purposes of this study were to: (a) examine the prevalence of overweight and obesity and the percentage of adolescent females from a rural community that meets physical activity recommendations; (b) examine the relationship of body composition physical activity and sedentary behavior on academic performance; and (c) examine the relationship between physical activity and physical self-concept among adolescent females. Thirty adolescent females (mean age = 15.6 ± 1.3 years) wore an Actigraph GT1M accelerometer for seven consecutive days set to measure in 15-second epochs. Age specific cutpoints were used to determine minutes of sedentary behavior and light moderate vigorous and moderate-to-vigorous physical activity (MVPA). Participants completed the Physical Self-Description Questionnaire (PSDQ) to assess how they perceive themselves physically. Height weight and percent body fat were measured. Grade point averages (GPA) were obtained from school records. Regression analysis was performed to predict GPA from measures of body composition sedentary behavior and MVPA. Measures of physical activity and sedentary behavior were correlated with PSDQ subscale scores with Pearson correlations. Thirty percent of participants (n = 9) were obese (BMI [greater than or equal to] 95th percentile) and another 36% (n = 11) were overweight (BMI between the 85th and 94th percentiles). None of the participants accumulated [greater than or equal to] 60 minutes of MVPA per day. Daily MVPA averaged 9.7 (± 7.1) minutes. Percent fat (r = -.51) minutes of MVPA (r = .34) and time spent in sedentary behavior (r = .32) were significantly correlated (p < .05) with GPA. Together measures of body composition physical activity and sedentary behavior explained 36% of the variance (multiple R = .60) in GPA. The standard error of estimate for predicting GPA was 0.64. Minutes per day spent in light physical activity was negatively correlated (p < .01) with the Self-Esteem (r = -.51) Body Fat (r = -.52) and Global Physical Self-Concept (r = -.48) subscales of the PSDQ. Only the Physical Activity subscale of the PSDQ was significantly correlated with MVPA (r = .36). In conclusion the current sample of adolescent females had a high prevalence of overweight and obesity and was physically inactive. Academic performance was significantly associated with measures of body composition physical activity and sedentary behavior. Time spent in light physical activity was associated with lower self-perceptions of body fat global physical self-concept and self-esteem. Measures of higher intensity physical activity were generally not associated with physical self-perception measures possibly due to the low amount of time spent in MVPA. Interventions to increase physical activity and improve body composition in adolescent girls should be considered not only for their health effects but also for their potential to impact academic performance and psychological profiles.

The benefits of sustained leisure-time physical activity on job strain

The long-term effects of leisure-time physical activity (LTPA) on job strain have not been assessed in a large prospective population-based cohort study. To examine the relationship between the LTPA and the prevalence of job strain. The participants were 861 full-time employees (406 men and 455 women), aged 24-39 years in 2001, from the ongoing Cardiovascular Risk in Young Finns Study. LTPA was assessed using a self-report questionnaire in 1992 and in 2001. The participants were grouped into four categories according to tertiles of LTPA index at two time points: persistently active, increasingly active, decreasingly active and persistently inactive. Job strain was measured in 2001 by indicators of job demands and job control. Baseline LTPA was inversely associated with job strain (P < 0.001) and job demands (P < 0.05) and directly associated with job control (P < 0.05) in both sexes in a model adjusted for the change in 9-year LTPA, age, educational level, occupational status and smoking. Compared with persistently active participants, persistently inactive participants had a 4.0-fold higher job strain after adjustment for the confounders. Similarly, persistently inactive participants had a 2.7-fold higher job demands and a 1.8-fold lower job control. Decreasing physical activity was independently associated with high job strain (P < 0.01) and with low job control (P < 0.01). Participation in regular LTPA during leisure may help young adults to cope with job strain. A long-term benefit of LTPA may play a role in the development of mental well-being.

Direct and Buffering Effects of Physical Activity on Stress-Related Depression in Mothers of Infants

This study examined the role of leisure-time physical activity in reducing the impact of high life stress and time pressure on depression, a buffer effect, for mothers of infants. A direct association between leisure-time physical activity and depression, regardless of both sources of stress, was also tested. A sample of approximately 5,000 mothers of infant children completed questionnaires that measured demographic characteristics, frequency of participation in leisure-time physical activity, life stress, time pressure, and depression (depressive symptoms). Hierarchical multiple regression incorporating an interaction component to represent the buffering effect was used to analyze the data. Frequency of leisure-time physical activity was significantly associated with lower levels of depressive symptoms for both types of stress and acted as a buffer of the association between life stress and depressive symptoms, but did not buffer the influence of time pressure on depressive symptoms. These findings indicated that leisure-time physical activity assists in maintaining the mental health of mothers of infants; however, caution is needed when promoting physical activity for mothers who feel under time pressure.