Active Leisure Time Predicts Happiness among Iranian Adults: A Study Comparing Adults with Physically Active versus Inactive Lifestyle

Physical activity (PA) has been shown to have positive efects on mental well-being. However, previous research has mostly concentrated on the negative efects of inactivity on mental well-being and examined the use of PA as a preventive or therapeutic treatment for mental disorders, rather than a proactive method of enhancing mental well-being. Terefore, there is a need to consider the connection between PA and enhanced mental well-being, such as happiness. Te current study sought to examine the levels of happiness among active and inactive adults. Te study’s participants were Iranian adults between 18 and 60years. Data were gathered using a modifed version of the 29-item Oxford 2002 Happiness Questionnaire and a researcher-developed leisure and PA questionnaire. N � 541 individuals completed the online survey, including n � 373 (68.9%) women and n � 168 (31.1%) men. More than half of Iranians (55.1%) reported low or moderate levels of happiness, and that those who engaged in active leisure pursuits reported signifcantly higher levels of happiness than those who were inactive during leisure time. Te results of this cross-sectional study suggest that engaging in PA during leisure time predicts happiness. Encouraging Iranian adults to be more physically active during leisure time could increase happiness levels and thus contribute to the sustainable happiness and well-being of society.


Introduction
Although there are many ways to defne happiness, it is generally agreed that it consists of pleasant mental or emotional (afective) sensations of satisfaction and fulfllment [1,2].For this study, we are defning happiness as a subjective state of mind characterized by enjoyment and contentment and a self-assessment of overall subjective wellbeing [3][4][5].
Tere is a growing body of literature highlighting the health benefts of happiness.A 15-yearfollow-up study, for example, found that higher levels of happiness are associated with lower mortality [6].Other research suggested that mental and physical well-being also play a role in enhancing happiness [7,8].Additionally, Lyubomirsky et al. [9] found that happiness was associated with a range of positive outcomes such as greater career success, better quality marriages and relationships, and better physical and mental well-being.
Tough several literature reviews have noted a benefcial relationship between PA and mental well-being [10], PA is not commonly studied as a contributing factor to happiness.Indeed, the feld of positive psychology emphasizes various other factors as the keys to happiness, including practicing gratitude [11], helping others [12], and cultivating positive emotions, relationships, engagement, and fnding meaning and accomplishment [13].Tus, more analysis is needed to understand the extent to which PA may contribute to sustainable happiness.
PA behavior is infuenced by both individual characteristics and the social environment.Whether an individual is physically active depends on demographic characteristics such as gender, age, and ethnic background and on socioeconomic characteristics such as education and income levels.It also depends on at least three other factors, the latter two of which are external to the individual: (a) attitudes, preferences, motivations, and skills related to the motor behavior; (b) opportunities or constraints that make the behavior easier or more difcult to perform; and (c) incentives or disincentives that encourage or discourage the desired behavior relative to competing activities [14,15].
Several countries are prioritizing happiness to enhance public health.Te World Health Organization [16] reported that the UK, France, and Canada are considering national happiness indices to complement existing measures of development like Gross Domestic Product (GDP) and are emulating Bhutan in doing so.Tis approach departs from using economic growth as the exclusive barometer of national well-being and has sparked discussion about how to promote happiness [17].
Recent research indicates that Iran is one of the least happy countries, ranking 110 out of 146 countries measured, and well below the world average from 2019 to 2020 [18].Iran's happiness score also decreased from 2019 to 2020 [19].Still, in recent years, working hours in Iran have decreased due to the rapid advancement of science, technology, and industrial development, thereby facilitating more leisure time, which should arguably contribute to greater happiness.
Leisure is an important part of a balanced lifestyle and is often described as essential for welfare [20].Leisure satisfaction can also predict both life satisfaction and health [21].Prior research demonstrated a positive relationship between perceived freedom in leisure and happiness and mental wellbeing [22].Additionally, routine activities and attitudes about leisure can have a signifcant positive efect on overall happiness [23], and increased happiness is considered a signifcant predictor of overall health in addition to being one of the most fundamental goals in life [24].
Still, leisure is a vague term, and not all leisure activities may have the same association with happiness.For example, Talmage et al. [25] found that PA was an important leisure pursuit for valuation of life, and PA during leisure time has been shown to improve mental well-being [26].However, environmental factors have systematically emerged as determinants of PA in adults.Te culture of ethnic minorities and barriers such as lack of afordable facilities, childcare, high crime rates, and fear of personal safety are primary reasons for not engaging in PA in leisure [27].Tus, while Iranians might beneft from engaging in more PA, they may be deterred from doing so due to some of these issues.
Further, the elements valued by older people as benefting them and contributing to their quality of life include health care, relationships, functional autonomy, and staying active.Terefore, physical activity is one of the relevant quality of life components for older people [28].Still, socio-contextual variables can infuence how much older people engage in physical activity, such as gender, educational level, functional capacity, and the practice of leisure activities, with older women and less-educated individuals exhibiting less proactive attitudes towards physical capacity and leisure activities [29].Likewise, socioenvironmental factors related to a higher quality of life are related to more physical activity in older people, such as income, education, and practicing healthy lifestyle [30].
Tis study aimed to investigate the happiness levels of Iranians and determine which aspects of leisure impact happiness.Te following hypotheses were explored: (i) Iranian adults will report low levels of happiness; (ii) more time spent in leisure will predict greater levels of happiness; and (iii) active leisure will predict greater levels of happiness than inactive leisure.

Materials and Methods
2.1.Participants.Te participants were N � 585 Iranian adults.Individuals were eligible if they met the following inclusion criteria: (1) no severe bipolarity with psychotic symptoms, no suicidal ideation and intent, no severe sensorimotor injury, (2) age range between 18 and 60 years, and (3) Iranian adults or adults living in Iran.Moreover, exclusion criteria were as follows: (1) having personality disorders and (2) substance use disorders.Of the N � 585 Iranians who completed the survey, n � 44 reported being younger than age 18 and were excluded.Tus, a fnal sample of N � 541 was used for analysis.

2.2.
Procedure.An online survey was used to recruit participants and collect data.Te survey was disseminated over 6 months through various Iranian websites and social media groups, with periodic reminders to boost participation and the sample size.After reviewing and signing an informed consent form, respondents were asked to complete a series of questionnaires including socio-demographic information, type and amount of leisure activity, and happiness.Te ethics committee of Tarbiat Modares University (Tehran, Iran) approved the study protocol (IR2021-367992) and its

Results
Regarding the frst hypothesis, the mean score for the aggregate happiness measure was 44.30, which was slightly higher than half of the highest possible score (i.e., 87).Tough no normative data for this modifed happiness questionnaire exist, M � 44.30 (SD � 0.72) does seem quite low, and the frequency counts in Table 1 indicate that more than half (55.1%) of respondents rated their happiness average or below average.Te second hypothesis was related to which leisure variables might predict happiness.A multiple regression was performed using the predictor variables of leisure activity (e.g., sports, art, traveling, and so on), type of leisure (active/ inactive), and time spent engaging in leisure (days and hours).Table 2 shows the regression model summary for happiness.Regarding the overall multiple regression to predict happiness, when leisure variables were used as predictors, about 6% of the variance in happiness could be predicted.Te efect size for R 2 or adjusted R 2 was medium.
Te ANOVA output indicated that the overall regression was statistically signifcant, F (10,530) � 3.22 and p < 0.001, suggesting that leisure factors signifcantly predict variance in happiness.However, the coefcients output for happiness indicated that only the type of leisure activity (i.e., active versus inactive) was signifcantly predictive of happiness when other variables were controlled, t (530) � 4.64 and p < 0.001.Te slope coefcient to predict happiness from type of activity was 6.92, meaning that predicted happiness for people engaging in active leisure was 6.92 points higher than for those engaging in inactive leisure.
However, the results of the regression model suggested that active leisure would predict greater levels of happiness than inactive leisure.An independent t-test confrmed this fnding: t (345.23)� −4.43 and p < 0.001.Te mean happiness score of those who were active during leisure was M � 48.72 (SD � 17.75) versus M � 41.92 (SD � 15.64) for those who were inactive.
To verify if happiness might be infuenced by sociodemographic factors in addition to type of leisure, a second regression model was performed with type of leisure, gender, age, marital status, education, and occupation included as predictor variables.Te model results were similar and signifcant with R � 0.24, R 2 � 0.06, adjusted R 2 � 0.03, and F (13,527) � 2.37 and p � 0.004.Additionally, only the type of leisure was a signifcant coefcient: t (527) � 4.84 and p < 0.001, with the coefcient slope to predict happiness from type of activity at 7.30.

Discussion
Tis study aimed to evaluate the happiness of Iranians and determine if time spent in leisure and type of leisure predicted levels of happiness.Te results supported two of the three hypotheses and were consistent with global happiness reports [18].Te self-reported happiness of study participants was relatively low, with more than half rating themselves as average or below average on the happiness scale.Interestingly, time spent engaged in leisure was not predictive of happiness.Rather, it was the type of leisure that was signifcantly predictive.Namely, that people who engage in active leisure had a higher happiness mean score than those who engage in inactive leisure.Tese fndings provide initial evidence that Iranians could beneft from engaging in more active leisure pursuits.Perspectives in Psychiatric Care Tese results are supported by prior studies showing a signifcant diference in happiness levels between exercising one day per week and not at all [33].Even 45 minutes of PA per week could signifcantly increase the chances of being happy [34].A similar pattern was observed in the relationship between PA and other aspects of mental wellbeing, such as depression and anxiety [35].
Tis was a cross-sectional study and claims of causation are not possible.Indeed, the relationship between happiness and physical exercise may be reciprocal.On the one hand, physical exercise can lead to happiness because exercise improves the fow of monoamines (such as noradrenaline, dopamine, and serotonin) throughout the brain [36] and boosts endorphin production [37].Tese physiological reactions are known to lessen anxiety and depressed symptoms while enhancing well-being [38].On the other hand, cognitive and afective processes, as described in selfdetermination theory [39], and afective models of behavior change, meaning that happiness can lead to PA.
However, despite the benefts of being regularly active, about one-third (31.1%) of people do not engage in any PA program [40,41].A review of past studies indicates that there is no single solution to promoting PA because perceived barriers vary in population subgroups [42].Terefore, future research should examine why Iranians choose to engage in active leisure and what motivates them to do so regularly.Similarly, it would be helpful to understand the specifc barriers to PA in Iranian culture.Such knowledge would provide valuable guidance for encouraging more active leisure and sustainable happiness for Iranian adults.
Our result, in line with Haase et al. [43], showed that many adult's levels of leisure-time PA fell short of the guidelines.For the selection of adults to get involved in the promotion of health through physical exercises or those who do not practice this type of activities, researchers and practitioners must examine the motivational factors that may distinguish between those who are active and those who are not.In a review of various well-known theories of exercise behavior, the need for theoretically grounded research on the motivational mechanisms underlying the start and maintenance of PA is emphasized .Tere are various practical justifcations for diferentiating between autonomous and regulating restrictions in exercise participation from a larger health promotion perspective.Research from the past has shown that more autonomous regulations are positively correlated with positive motivational outcomes (such as behavioral persistence, task involvement, improved psychological well-being, and quality of life) and negatively correlated with more controlling regulations [44].

Strengths and Limitations.
Te present study has several strengths.First, that the study considers how PA and leisure activities afect happiness.Previous research has not given much thought to how PA afects happiness.Instead, most studies have concentrated on the psychological aspects of happiness.Terefore, it was important to examine other aspects of this phenomenon such as PA and active leisure and expand the existing knowledge in this feld.Second, the study investigated two types of leisure among Iranians (active and inactive), and their relationship with happiness has been examined.Tird, the study examined the role of PA and its connection to happiness in the context of Iranian culture.Tus, the results may be used as a point of reference for countries with similar cultures.Fourth, results were derived from a sizable sample, and various levels of recreational PA were used to determine participants' happiness levels.
However, there are limitations that need to be considered.Data were collected using an online method.Consequently, people without access to the Internet could not participate.Additionally, using only one method (selfreported surveys) to collect data limited our understanding of the connection between PA and happiness.A recommendation for future research is to employ other methods (e.g., interview, observation, laboratory design, and so on) to enhance knowledge in this area.Moreover, future research could address the issue of why Iranians prefer certain physical activities in their free time and their motivations for engaging in such activities.Finally, future research could develop a typology of Iranian's leisure physical activities to better inform potential policies designed to promote physical activity.
In general, theoretical implications for other researchers or academics are that the time spent in leisure can be considered a determining factor in happiness.Terefore, researchers and academics should pay attention to the ways in which specifc types of leisure activities can promote happiness.From a practical perspective, the study results suggest that Iranians could beneft from raised awareness through the media and mass information tools that engaging in active leisure is connected to greater happiness.Moreover, public policy ofcials should consider promoting and developing active leisure facilities for Iranians, to help increase the level of happiness in the Iranian society.

Conclusions
More than half of the Iranians reported low to moderate levels of happiness, which suggests that there is much room for improvement, particularly as various countries begin using happiness as a national measure of well-being [45].Te study identifed that engaging in active leisure signifcantly predicted higher happiness levels.Terefore, health ofcials in Iran could consider encouraging more active

2
Perspectives in Psychiatric Care amendments.Te present study was conducted in accordance with the ethical principles laid down in the Declaration of Helsinki and its later amendments.Data were collected via an online survey over a period of 2 weeks in May 2021.Data analysis was performed with IBM SPSS v26.0.A multiple regression used to identify signifcant predictors of happiness.Tis was followed by an independent t-test examining the diference in happiness levels between participants who were active and inactive during leisure time.Te outcome variable of happiness was normal, with skewness and kurtosis scores within the ±2 acceptable range, and no outliers.Statistical signifcance was set a priori at p < 0.05.
2.3.2.Leisure.To assess time spent in leisure and the type of activity, a researcher-developed Physical Activity Leisure Questionnaire was used.Participants indicated the number of days per week they engaged in leisure time and the length of time spent during these days.Additionally, they were asked about the type of activities.Levels of PA were rated on a scale of vigorous and moderate.Activities that require a lot of physical efort, make you breathe quickly, perspire heavily, and leave you feeling exhausted were considered vigorous PA.Contrarily, moderate PA was characterized as activities that require minimal physical efort, make you feel a little exhausted, and allow you to breathe normally.2.4.Statistical Analysis.

Table 1 :
Frequency counts for happiness.

Table 2 :
4egression model summary for happiness.constant),spendingleisure: other; leisure time hours: 1 to 2; type leisure; leisure time week: over 5 days; spending leisure: family; leisure time week: 4 to 5 days; spending leisure: art; leisure time week: 3 to 4 days; spending leisure: sports; leisure time hours: 5 to 6. b Dependent variable: happiness.Note.Spending leisure � travel, leisure time hours � 3-4, and leisure time week � 1-2 were excluded from the model.4Perspectives in Psychiatric Care leisure for Iranians, regardless of their socio-demographic status, to help bolster happiness levels.Te fndings of this research could help health professionals and policy makers to make Iranian society happier.Tey could create a framework for allowing more Iranians to participate in active leisure pursuits, thus contributing to the sustainable happiness and well-being of society.