The Impact of COVID-19 Pandemic Restrictions on Physical Activity and Psychological Characteristics of the Iranian People

Background The aim of this study was to investigate the impact of the COVID-19 pandemic restrictions on physical activity behaviours, as well as on mental health indicators among Iranian residents. Methods In this cross-sectional study, 335 participants were included (155 males, mean age = 30.06 ± 14.58 years). The eligibility criteria for this study were as follows; 1- Having at least 10 years of age. 2- Having a minimum literacy rate 3- Ability to work with networks of smart communication devices such as smartphones and computers 4- Living in Iran for the past 5 years. Participants were selected through the convenience sampling and lled out an online questionnaire measuring physical activity behaviours (The International Physical Activity Questionnaire; IPAQ; Short Form) and two mental health indicators – self-esteem (Rosenberg self-esteem scale) and social physical anxiety (7-items social physique anxiety scale). The results of Wilcoxon test showed that participants reported signicant differences from before to during the pandemic in all three variables of physical activity (signicant decreases), self-esteem (signicant decreases), and social physical anxiety (signicant increases). This difference was found, regardless of participants’ gender. The results of Spearman correlation test between changes in physical activity and changes in mental health indicators showed that COVID-19 pandemic negatively impacted self-esteem and social physical anxiety. However, we have not found any signicant association of physical activity’s change with social physical anxiety or self-esteem’s changes before and during the pandemic.


Abstract Background
The aim of this study was to investigate the impact of the COVID-19 pandemic restrictions on physical activity behaviours, as well as on mental health indicators among Iranian residents.

Methods
In this cross-sectional study, 335 participants were included (155 males, mean age = 30.06 ± 14.58 years). The eligibility criteria for this study were as follows; 1-Having at least 10 years of age. 2-Having a minimum literacy rate 3-Ability to work with networks of smart communication devices such as smartphones and computers 4-Living in Iran for the past 5 years. Participants were selected through the convenience sampling and lled out an online questionnaire measuring physical activity behaviours (The International Physical Activity Questionnaire; IPAQ; Short Form) and two mental health indicators -self-esteem (Rosenberg self-esteem scale) and social physical anxiety (7-items social physique anxiety scale).

Results
The results of Wilcoxon test showed that participants reported signi cant differences from before to during the pandemic in all three variables of physical activity (signi cant decreases), self-esteem (signi cant decreases), and social physical anxiety (signi cant increases). This difference was found, regardless of participants' gender. The results of Spearman correlation test between changes in physical activity and changes in mental health indicators showed that COVID-19 pandemic negatively impacted self-esteem and social physical anxiety. However, we have not found any signi cant association of physical activity's change with social physical anxiety or self-esteem's changes before and during the pandemic.

Conclusions
In sum, the ndings of the present study indicate a detrimental effect of the COVID-19 pandemic on the physical activity and mental health among Iranian's residents. Public policies aiming to buffer the negative impact on COVID-19 Iranians' health are urgently needed.
Background  is a highly contagious disease caused by acute respiratory syndrome [1]. The disease was rst observed in mid-December 2019 in Wuhan, China. Since the outbreak of the virus, the number of reported cases has increased rapidly and has affected the whole world. On January 30, 2020, the World Health Organization (WHO) a rmed the disease as "an international public health emergency" [2]. By the end of July 2021, more than 192 million people worldwide has been infected by the disease, of which more than 4 million people have died (World Health Organization, 2021) [3]. During this period, the WHO advised people to maintain social distance, use masks, to avoid public places such as restaurants, sports clubs, shops and stores, etc., and to cooperate with the WHO and local governments to avoid escalation of this disease [3]. As the coronavirus intensi ed, people were instructed to leave their home for very limited purposes, such as shopping for food or seeking medical attention. As a result, most sports venues and clubs were closed [4]. In other words, the reduction of physical interaction, known as social or physical distance, has been considered as the rst line of defence against this pandemic [5]. However, such social distances, or even temporary quarantines, can themselves have adverse effects on other facets of individuals' lives: such as their physical activity (PA) and mental health Iran is also one of the countries deeply affected by the COVID-19 pandemic. According to the WHO, by the end of July 2021, about 3,623,840 (4.37% of the whole Iranian population) cases have been affected by coronavirus and 88,066 (0.10%) persons have died in Iran [3]. Despite this situation, by the end of July 2021, just over 2,268,826 (2.73%) people had been vaccinated [7]. By this severe spread of the virus in Iran and low pace of vaccination in this country, as well as social and physical restrictions and temporary quarantines, it seems that this country has been severely faced with the subsequent physical and psychological consequences of this pandemic [3]. Undoubtedly, the COVID-19 pandemic has had several effects on individuals' behaviours [8].
According to reports and researches, critical situations and pandemics may affect differently the PA and mental health of people at different levels of society such as patients, health care workers, families, children, students, and even athletes [2,5,9,10]. For example, when a negative event occurs in life, states of anxiety and stress perception are exacerbated by a lack of relationship with others due to social distance [11]. In other words, the current emergency situation that combines both the stress due to COVID-19 with social isolation may have an important emotional and physical impact [12,13].
The positive effects of regular PA on many health outcomes have been well established [14], and studies have observed this link during the COVID-19 [9]. In addition, exercising regularly and maintaining a lifestyle during quarantine is crucial to prevent future chronic illnesses due to sedentary habits [5]. However, research has shown that engagement in PA may have decreased during the COVID-19 pandemic [6,15]. For example, Amini et al. [15] reported that the physical activity level of Iranian people decreased before and during the COVID-19 pandemic.
Furthermore, concerning emotional factors, researchers have also shown that quarantine and isolation can also lead to anxiety [16-18]. One of these types of anxiety variables is social physical anxiety. Social physical anxiety is a social psychological variable that is in uenced by theories of self-expression and management and it assesses a person's perceived anxiety about presenting his body and gure when they are in front of others [19]. Social physical anxiety is mainly associated with some of the prominent psychological and behavioural factors associated with health. For example, social physical anxiety is associated with variables such as physical self-esteem [20], body image [21] and levels of PA [22]. Social physical anxiety like other types of anxieties appears to increase during the COVID-19 pandemic [23,24]. In addition to this variable, self-esteem as another psychological variable can be affected in this situation [25]. Self-esteem can be de ned as person's self-assessment [26]. This variable is important for a successful and satisfying life and is an essential aspect of psychological well-being. Research has shown a positive relationship between PA and individual's selfesteem [27]. In the present study, we tried to pay attention to these physical and psychological variables and evaluate the impact of the COVID-19 pandemic on them. To date, however, much research has been conducted worldwide on the impact of the COVID-19 pandemic on levels of PA and mental health [6,[28][29][30]. Also, there is little information about this, especially for Iran [31]. Therefore, this study is designed to achieve the following two goals. First, this study aimed to compare the level of physical activity and other psychological indicators such as self-esteem and social physical anxiety before (i.e., retrospectively assessed) and during the COVID-19 pandemic. This procedure will give us a better understanding of the adverse effects of pandemics on PA and psychological states in Iran. In the second step, this study aimed to examine how changes in PA are associated with mental health indicators such as self-esteem and social physical anxiety before and during the COVID-19 pandemic.

Study design and setting
The present study was a cross-sectional web-based study and was performed on a cohort group of Iranian citizen in the spring of 2021. In this study, participants answered the web-based questionnaires of physical activity, self-esteem and social physique anxiety. In these electronic questionnaires, individuals were asked to answer questions in two time periods before and during the pandemic.

Participants
The sample size was calculated using G- They were selected through available sampling for this study and lled out an online questionnaire after expressing their consent to participate and they had the option to withdraw from the study at any time. They were from different parts of Iran. The eligibility criteria for this study were as follows; 1-Having at least 10 years of age. 2-Having a minimum literacy rate 3-Ability to work with networks of smart communication devices such as smartphones and computers 4-Living in Iran for the past 5 years.

Scales
The International Physical Activity Questionnaire (IPAQ; Short Form) The IPAQ was used to measure participants' physical activity [32]. This questionnaire is designed to be used among adults aged 18 to 65 years [33]. The way of scoring is that activities such as aerobics, high-speed cycling, mountaineering and basketball, which require more than 6 calories per minutes of energy, are classi ed as intense activities. Activities such as volleyball, badminton, and room cleaning, which require 3 to 6 calories per minute, are classi ed as moderate activities.
Any activity that is less than ten minute is not considered [32]. Scores for sitting time during the week are calculated separately and are not included in the nal score estimate. Each Metabolic Equivalent Task (MET) minutes per week represents the amount of energy consumed for physical activities per week. To obtain the continuous variable score of the IPAQ, it is su cient to multiply the number of days in the time related to physical activity, as well as the number of METs per week to calculate the amount of energy consumed for physical activity. Since this tool measures physical activity in three categories: low activity level, moderate activity level and intense activity level, each of the mentioned activity intensities will have a different weight. For example, the weight of walking will be 3.3, the weight of moderate activity will be 4 and the weight of intense activity will be 6. The nal score of PA is the sum of scores related to the three categories of low activity level, moderate activity level, and intense activity level [34].

Self-esteem scale
The Rosenberg self-esteem scale (1965) measures a person's overall self-esteem [35]. This scale includes 10 general terms that measures the level of life satisfaction and a good feeling about oneself; for example, the rst question was as follows: "On the whole, I am satis ed with myself". Participants had to answer this question using the 4-point Likert scale, from strongly agree to strongly disagree. This tool is a common and valid tool for measuring self-esteem in all over of the world.
This scale has a higher correlation than the Coopersmith self-esteem questionnaire and has a higher validity in measuring self-esteem levels [36]. In another study, the internal consistency of this scale was reported to be appropriate and about 0.74 [27]. Cronbach's alpha was observed 0.86 in the current sample.

Social physical anxiety scale
The social physical anxiety scale [37] consists of seven items, for example: "I sometimes get upset because I think others

Data analysis
Statistical analysis was performed using SPSS software version 26. To analyse the data collected through questionnaires, rst, preliminary analyses were conducted, such as testing for normality using the Kolmogorov-Smirnov test, and then descriptive statistics were used to describe the data extracted from the questionnaires. According to the purpose of the study, initially the collected data were compared in the two time periods before and during the outbreak of coronavirus.
This comparison was performed in both gender of men and women in general. Considering that another purpose of the present study was to investigate the relationship between changes in PA and mental health indicators from before the pandemic to the during of it, the residualized change scores were obtained by regressing scored variables during pandemic (e.g., PA during the pandemic) on their respective variables before pandemic (e.g., PA before the pandemic) [39].

Results
The results of descriptive statistics showed that, most of participants were single (200 participants, 59.07%) and the rest were married (135 people, 40.03%). Almost most of them (211 participants, 63%) had a university degree. The rest of the participants (124 participants, 37%) had a high school diploma. One hundred twelve (33.4%) of the respondents were students, 132 (39.4%) were employees, and the rest of the participants were employed in freelance and private jobs (91 participants, 27.1%). Preliminary ndings also revealed that the extracted data from the questionnaires did not follow a normal distribution; therefore, the researchers used non-parametric statistics to analyse the data. Wilcoxon test was rst used to compare the groups in the two time periods before and during the pandemic. The results of this test showed that the participants of the present study reported a signi cantly lower overall level of PA and self-esteem from before to during the COVID-19. These differences were consistent in both genders ( Table 1). The results of Spearman correlation test indicated a signi cant negative relationship between self-esteem and social physical anxiety changes from before to during of COVID-19 pandemic. This signi cant negative relationship was observed in both genders. However, the results did not show any signi cant association between changes in PA and in social physical anxiety as well as with changes in self-esteem, from before and during coronavirus ( Table 2 and Figure 1).

Discussion
This study is one of the rst studies in Iran that not only examines the impact of the COVID-19 pandemic on the level of PA, but also examines other psychological variables such as self-esteem and social physical anxiety during the COVID-19 pandemic. Speci cally, this study had two objectives. First, it aims of to compare PA levels, self-esteem and social physical anxiety of the participants from before to during the COVID-19 pandemic. Second, it aims to investigate the relationship between changes in these variables, from before to during the COVID-19 pandemic.
As predicted, the results showed that all the measured indices were different before and during the pandemic, lower levels of PA and self-esteem and higher levels of social anxiety from before to during the COVID-19. Contrary to our hypothesis, we only found one signi cant negative association between self-esteem of individuals and their physical social anxiety (higher self-esteem was associated with lower physical social anxiety) both on the changes scores from before to during the COVID-19. However, PA changes were associated neither with self-esteem nor with physical social anxiety changes.
The ndings indicating detrimental effects of the COVID-19 pandemic on the levels of PA and of psychological indicators are in line with previous studies [6,[28][29][30]. For example, Di Franco et al. [10] in their study examined the effects of social distance on mental status and PA during the COVID-19 pandemic. In their study of 1,132 Italian athletes, the researchers concluded that the COVID-19 pandemic had a negative effect on perceived stress as well as psycho-biological and social conditions.
Amini et al. [15], in their research, show that the COVID-19 pandemic negatively affected the level of PA of Iranian individuals. Therefore, the ndings of the present study, in line with the ndings of Amini et al. [15], show that the level of PA of the Iranian people has decreased signi cantly compared to the time before the pandemic. The results of this study also showed that the level of sedentary behaviours (the amount of time people spend sitting) has increased signi cantly. These changes are seen in both genders. Amini et al. [15] also observed the negative effects of pandemics in both genders. However, others have shown that the pandemic has mainly affected the intensity of PA and not its frequency in Iran [31].
In another study, Cheval et al. [9] examined the association between PA change, sedentary behaviour, and mental health during the coronavirus pandemic in France and Switzerland. In their study, participants also answered online questionnaires that measured PA, mental and physical health, anxiety and depressive symptoms. Their ndings show that the COVID-19 pandemic, although leading to a decrease in vigorous activity as well as an increase in sedentary behaviour among the population, the amount of moderate PA or walking among individuals have also increased. In the present study, PA in all its indicators such as moderate and vigorous PA, walking and over-all PA score decreased during the COVID-19 pandemic period compared to before. The ndings of the present study are consistent with the ndings reported by Cheval et al. [9] regarding vigorous PA, but the results are in contrast with their ndings on other indicators such as moderate PA and walking. These differences can be explained considering the culture of sports and PA among the participants. We can speculate that people in developed countries such as France and Switzerland are more likely than people in countries like Iran to employ bene ts of PA to improve their own physical and psychological health. Another possible reason for the decrease in PA of the participants of the present study after the pandemic is the type of occupation of individuals. As reported in the results and participants sections, the majority of those who participated in the present study were either students and university students or government employees. Universities and schools were closed during the COVID-19 pandemic. Virtual and distance education were implemented to replace traditional teaching strategies. In addition, for employees, telecommuting has replaced attendance at work. Overall, it seems that these frequent and long stays at home, as well as the available stress and fear of leaving home, all led to increased sedentary behaviours and less presence in sports places.
Although the results of the present study did not show any signi cant relationship between PA changes and other psychological indicators such as self-esteem and social physical anxiety changes, they indicated a signi cant and negative relationship between self-esteem and social physical anxiety. To explain this nding, it can be said that high selfesteem has probably reduced concerns about weight and appearance of people in social situations and therefore has reduced the level of social physical anxiety [20]. This relationship has been established in this study.
In the present study, decreased self-esteem and increased post-pandemic social physique anxiety were reported. Research has shown that with the onset of the COVID-19 pandemic, people's use of social networks such as Instagram has increased dramatically [40]. On the other hand, it has been found that there is a relationship between the use of social networks and increased body dissatisfaction and reduced self-esteem [40]. Therefore, the reported decrease in self-esteem, as well as the increase in levels of social physique anxiety among the sample studied in the present study, can be attributed to the possible increase in people's use of social networks, especially Instagram. In the present study, the use of social networks has not been measured. It is suggested that future research measures the use of social networks during the pandemic and compares it with before the pandemic, to examine the impact of the pandemic address the level of PA and indicators of mental health such as self-esteem and social physique anxiety.
PA is an essential part of a healthy lifestyle that can prevent or manage chronic diseases, facilitate daily life activities, and also maintain physical function in people, especially the elderly [9]. In other words, PA can be associated with a myriad of positive physical and mental health consequences [9]. However, since the results of the present study could not show a relationship between the level of PA and other psychological variables, it is suggested that the ndings of this study should be applied more cautiously. Therefore, governments especially the government of Iran, with the help of experts in the eld of sports and health should create conditions allowing individuals to participate in sports and PA with more motivation and facilities. They could also aim to prevent the accumulation of sedentary behaviours, which are associated with detrimental mental and physical problems.
This study is one of the rst studies in an Iranian sample which investigates the impact of the COVID-19 pandemic on the level of PA and on some psychological variables. However, the results of the present study have several potential limitations. First, the study results are limited by the traditional limitations of cross-sectional study designs. For example, one of the limitations of the present study was the retrospective assessment of variables in reference of the beforelockdown period. In this study, participants were asked to report their level of physical activity and psychological indicators in the two time periods before and during the COVID-19 pandemic. Although post-pandemic questions coincided with research implementation, pre-pandemic questions were retrospective and past-related. The next limitation of the present study can be attributed to the geographical scope of the respondents who completed the web-based questionnaire. This dispersion may not be the same throughout the country in different regions and may be more speci c to a particular part of the country (In the present study, participants were from different cities of Iran, but most of them were from Khuzestan, Tehran, Alborz and Kurdistan provinces). Another limitation of the present study was that it was a web-based one. Mainly, some people could not participate in this study due to lack of Internet access, absence in cyberspace or lack of knowledge to complete the questionnaires of this study. Therefore, the ndings of the present study should be used with more caution. Due to the above-mentioned limitations, it is suggested to conduct other researches, which may tackle those limitations.

Conclusions
The ndings of this study showed that the pandemic was associated with lower the levels of PA among the Iranian people, and with lower self-esteem and higher physical social anxiety. However, unlike previous studies, we did not observe a signi cant association of PA with self-esteem and social physical anxiety. Future large-scale studies and with a more heterogeneous sample of Iranian residents should be conducted to further examine the expected protective role of physical activity on mental health outcomes. Meanwhile, public policies aiming to buffer the negative impact on COVID-19 Iranians' health are urgently needed.

Declarations
Ethics approval and consent to participate Before the start of this web base study, informed consent was obtained from all participants. This study was approved by the Ethics Committee at the department of motor behavior and sports psychology of Shahid Chamran University of Ahvaz (16032021). All methods were carried out in accordance with relevant guidelines and regulations.

Consent for publication
No individual or indemni able data is being published as part of this manuscript.

Availability of data and materials
The datasets generated and analyzed during the current study are not publicly available due to ethical restrictions, however, they are available from the corresponding author on reasonable request.

Competing interests
The authors declare that the present study was conducted in the absence of any commercial or nancial relationships that could be construed as a potential con ict of interest.

Funding
This research received no external funding.