Physical Education, Quality of Breathable Air and Their Effects on the Formation of High School Students as Sustainability in Maintaining the Lifestyle. Is the Physical Education Lesson Enough to Create such Valences?

This study was conducted to emphasize the correlation between the number of physical education lessons with effects on the formation of high school students and the importance of practicing physical activities during the extra-class time in sustainable spaces with quality breathable air. The values were recorded in this cross-sectional study; on a number of 208 high school students; grades 9–12; tested for the level of manifesting their effort capacity acquired during the physical education lessons. The statistical analysis of the processed data highlights the obtained values: Weak 59% and 31% satisfactory for boys; and 53.92% weak; 34% satisfactory for girls. In conclusion; the necessity to carry out extra-curricular physical activities in an unpolluted environment and to acquire useful physical skills in carrying out different activities in society, promotes and generates sustainability in maintaining the lifestyle.


Introduction
The environment in which people live is defined firstly by the quality of air, water, soil, dwelling place, and by the food they eat, as well as by the environment where they carry on their habitual activities. Closely related to these factors, influenced and determined in the short or long run by them, is the population's health condition [1]. In their vast majority, green spaces are arranged for definite purposes and are used for certain activities, the laws in force supporting their intentions. "Generally, the city is a great resources consumer and a big producer of pollutant emissions and waste, being therefore a great threat and influence on the environment" [2].
HSS have the ability to make a sustained physical effort, which involves "a mechanical work with the highest intensity, with a duration as long as possible" [17], unconcerned of its forms of manifestation. "The effort's capacity represents the maximum power of which an individual is capable to realize, it being the maximum intensity of the effort that can be realized by a subject, or representing the maximum working quantity of a mechanical thing that can be made in the time unity of an individual" [18].
Physical effort made by high school students is generated by the functionality of "internal organs and systems having at the base the specific energetic potential, from which it results a mechanical thing expressed in acknowledged measurement units" [19], "to which is added a cognitive loading on functional activities" [20], as well as the maintaining of "the body position as natural as possible" [21], which are dependent on the quality of the air breathed in the environment. Thus, the human movement achieved by muscular contraction [22] is the basis of the manifestations of the different practical skills acquired during school hours, especially during the physical education lesson.
Internationally, the importance of the existence of an adequate and balanced curriculum by which the number of hours of physical education for young pupils is materialized in many objectives, like getting good health, good physical development, a healthy lifestyle, and last but not least, pleasure to practice exercises independently or in a team. However, in Romania, most studies emphasize the importance of physical education classes without exemplifying the variety of activities that could be included in the school curriculum, with an important role in acquiring the skills for HSS [23].
The lack of appropriate physical activity, especially during the growth period, exposes the students to different diseases [24,25], which subsequently need to be treated by methods of recovery and rehabilitation [26], and the incidence of air quality, especially in urban areas where, due to varied anthropoid activities, "high concentration of the pollutants in atmosphere are resulting (example: carbon oxides, nitrogen, sulphur, suspension powders, and sedimentary powders, toxic substances) over the limits where they are usually found in the atmosphere" [27,28], generate the reorientation towards spaces or places that offer sustainability, in which various extra-class physical activities can be carried out. These locations are equipped with electronic means that facilitate learning [29] by visualizing personal biomechanical movements, also contributing to the development of positive attitudes towards physical education (PE) [30].

Aim
The aim of the study was to emphasize the connection between the manifestation of the level of anaerobic effort capacity of high school students during physical education lessons and the quality of breathable air where they practice their sustainable physical activities in order to maintain a healthy lifestyle.

Hypothesis
The hypothesis from which we started is to emphasize the direct connection between the number of hours of physical education provided in the Romanian school syllabus for high school students with effects on their formation and the necessity to do extra-class physical activities which provide sustainability in maintaining the lifestyle.

Methodology
The research was conducted at "Mihai Viteazul" National College from Bucharest, during a school year, the subjects being HSS from the 9th-12th grades, in number of 208:105 girls, 103 boys.
The research was carried out by involving the physical education teachers who taught at the study centers and the authors of the paper, who have acquired experience both in teaching physical education in high school and in higher education, their teaching and research experience and research confirming the familiarity of the authors of the paper with the tests used to validate the hypothesis of the study.
The experiment allowed the application of observational and experimental methods, with the purpose of recording and interpreting the values obtained by the HSS, during the physical education lesson (PEL), as well as generating feedbacks of major significance in the management of the didactic process and of the weights from the physical activities in the PEL. This fact allowed us to make a correct quantification of the applied tests [20,31,32].
The recording of the anthropometric data of each student, by age categories were recorded as follows: for girls: The processing of the data obtained and the use of the Sargent test, (expressed in kg/s) allowed us to evaluate the anaerobic capacity, manifested by the HSS, during the PEL, in accordance with the quality of the air breathed during the physical activities [17]. "Nevertheless, in order to achieve these results, teachers need to design and apply pedagogical strategies routinely, and pay very close attention to the dynamics created in the classroom" [33] and to the responses to visual stimuli (visual reflex), which contribute to the achievement of the tasks appropriate to the formation of psycho-motricity by functioning of the mechanisms of inverse communication (the emission of feed-back) [34].
The high school students' (HSS) motor skills acquisition is at this age at a certain level, and demonstrates personal achievements under the influence of the various factors that have contributed to the development of the student's abilities up to this moment, skills that can be further improved through practical exercises [35]. Therefore, the subjects under study will carry out, without deviating from the structure of the PEL (physical education lesson) the following: • performing 3 series of 3 vertical jump, successive, with a pause of 10 s after each series of vertical jumps. The best vertical jump will be taken into consideration, confirming the level each student has achieved. The best leap will be the result of a correct coordination between the positions of the body segments and breathing, throughout jumping [36].
Assessments made and the values obtained from the applied tests were corroborated with the investigation, during the same period, of the values of the concentrations from the different compounds of the breathable air in the locations closest to the place where the study was carried out.

Statistical Analysis
With the obtained results, we calculated the arithmetic mean (X), the standard deviation (S), coefficient of variation (Cv%), the estimation of medium error (EME), and of the significance of the difference between the two means-the "z" test [35].
The "z" test value = 9.02 obtained, for HSS, and compared to the "t" value in Fischer's table, is higher, and taking into account the value threshold p < 0.01, we find the difference obtained, thus validating the hypothesis of the study.

Results
For a period of one year, the records of these compounds showed values between certain limits, their monitoring being performed also at intervals of 6 months, as well as 6 months after the completion of the tests. For a period of one year, the records of these compounds showed values between certain limits, their monitoring being performed also at intervals of 6 months, as well as 6 months after the completion of the tests. The admitted limits recorded at Mihai Bravu point/center, closest to the place where the study was conducted, show the concentrations during a school year of NOx ( Figure 1                  Irrespective of the class level, the values recorded are low ( Figure 8), an aspect that highlights the reduced time allotted to physical activities by HSS, insufficient for the acquisition of new skills and a healthy lifestyle.
The values obtained from the statistical indicators (X, S, Cv, EME, and the "Z" test), recorded in Table 1, and their comparison with the reference values, separately for girls and boys, for p < 0.01, show the level of physical effort made by the HSS, related to the time allocated for physical activities. Only the time during the PEL is taken into account and, as the obtained values show, the available time is not enough to develop in HSS an adequate effort capacity to maintain an optimal long-term health condition. The physical activities performed inside of the PEL allowed us to highlight how successful or not this lesson is in acquiring a general capacity of the human body, directly reflected in the lifestyle. The values obtained, expressed as a percentage, are highlighted in Table 2, Figure 9 for boys and in Table 2, Figure 10, for girls.   Irrespective of the class level, the values recorded are low (Figure 8), an aspect that highlights the reduced time allotted to physical activities by HSS, insufficient for the acquisition of new skills and a healthy lifestyle.
The values obtained from the statistical indicators (X, S, Cv, EME, and the "Z" test), recorded in Table 1, and their comparison with the reference values, separately for girls and boys, for p < 0.01, show the level of physical effort made by the HSS, related to the time allocated for physical activities. Only the time during the PEL is taken into account and, as the obtained values show, the available time is not enough to develop in HSS an adequate effort capacity to maintain an optimal long-term health condition. The physical activities performed inside of the PEL allowed us to highlight how successful or not this lesson is in acquiring a general capacity of the human body, directly reflected in the lifestyle. The values obtained, expressed as a percentage, are highlighted in Table 2, Figure 9 for boys and in Table 2, Figure 10, for girls.  Irrespective of the class level, the values recorded are low (Figure 8), an aspect that highlights the reduced time allotted to physical activities by HSS, insufficient for the acquisition of new skills and a healthy lifestyle. The values obtained, expressed as a percentage, for boys in Table 2, Figure 9, and for girls in Table 2, Figure 10 demonstrate the insufficient time allotted to the hours of physical education in the school curriculum in Romania. The values obtained from the statistical indicators (X, S, Cv, EME, and the "Z" test), recorded in Table 1, and their comparison with the reference values, separately for girls and boys, for p < 0.01, show the level of physical effort made by the HSS, related to the time allocated for physical activities. Only the time during the PEL is taken into account and, as the obtained values show, the available time is not enough to develop in HSS an adequate effort capacity to maintain an optimal long-term health condition. The physical activities performed inside of the PEL allowed us to highlight how successful or not this lesson is in acquiring a general capacity of the human body, directly reflected in the lifestyle. The values obtained, expressed as a percentage, are highlighted in Table 2, Figure 9 for boys and in Table 2, Figure 10, for girls. The values obtained, expressed as a percentage, for boys in Table 2, Figure 9, and for girls in Table 2, Figure 10 demonstrate the insufficient time allotted to the hours of physical education in the school curriculum in Romania.    In order to determine the concentration evolution for nitrogen oxides concentration for 4 data collection centers (Berceni, Drumul Taberei, Lacul Morii, and Mihai Bravu, Figure 11), during one year the data were calculated mathematically. Studies conducted thus to underline a weekly concentration distribution and also an hourly distribution.
The data were also calculated to underline the cumulative evolution of (CU) pollutants concentration being recorded daily during the study period. In Figures 12, 13, and 14, the evolution of NO, NO2, NOx concentration for 4 collecting data centers is comparatively presented.  The values obtained, expressed as a percentage, for boys in Table 2, Figure 9, and for girls in Table 2, Figure 10 demonstrate the insufficient time allotted to the hours of physical education in the school curriculum in Romania. In order to determine the concentration evolution for nitrogen oxides concentration for 4 data collection centers (Berceni, Drumul Taberei, Lacul Morii, and Mihai Bravu, Figure 11), during one year the data were calculated mathematically. Studies conducted thus to underline a weekly concentration distribution and also an hourly distribution. In order to determine the concentration evolution for nitrogen oxides concentration for 4 data collection centers (Berceni, Drumul Taberei, Lacul Morii, and Mihai Bravu, Figure 11), during one year the data were calculated mathematically. Studies conducted thus to underline a weekly concentration distribution and also an hourly distribution.
The data were also calculated to underline the cumulative evolution of (CU) pollutants concentration being recorded daily during the study period. In Figures 12, 13, and 14, the evolution of NO, NO2, NOx concentration for 4 collecting data centers is comparatively presented.   The data were also calculated to underline the cumulative evolution of (CU) pollutants concentration being recorded daily during the study period. In Figures 12-14, the evolution of NO, NO 2 , NO x concentration for 4 collecting data centers is comparatively presented.  In order to determine the concentration evolution for nitrogen oxides concentration for 4 data collection centers (Berceni, Drumul Taberei, Lacul Morii, and Mihai Bravu, Figure 11), during one year the data were calculated mathematically. Studies conducted thus to underline a weekly concentration distribution and also an hourly distribution.
The data were also calculated to underline the cumulative evolution of (CU) pollutants concentration being recorded daily during the study period. In Figures 12, 13, and 14, the evolution of NO, NO2, NOx concentration for 4 collecting data centers is comparatively presented.     These predictions were necessary to establish the training program so that the start of the training schedule should begin in the days and hourly intervals with the lowest concentrations, after which the intensity and the allotted time for the exercise should increase gradually.
The values in the figures 1-7 are cumulative for NO, NO2, and NOx, and are expressed in μg/m 3 , and the evolution of the concentration of pollutants in certain days and hours was monitored, due to the fact that the physical activities took place during a certain period of the day.
Additionally, it is necessary to emphasize the fact that at the age of 14-18 years, the students' bodies being in the period of transformation and maturation, the consumption of O2 in the internal functional systems is increased, therefore the inhalation of a qualitative air, without pollutants, contributes to the acquisition a healthy lifestyle. Figure 15 presents the mean annual concentrations of SO2 resulted after pattern making. In the same manner of patterns (Figure 16), the map of iso-concentrations of SO2 for the 3rd daily maximum value is presented (used as reference by EU directives of air quality).  These predictions were necessary to establish the training program so that the start of the training schedule should begin in the days and hourly intervals with the lowest concentrations, after which the intensity and the allotted time for the exercise should increase gradually.
The values in the figures 1-7 are cumulative for NO, NO2, and NOx, and are expressed in μg/m 3 , and the evolution of the concentration of pollutants in certain days and hours was monitored, due to the fact that the physical activities took place during a certain period of the day.
Additionally, it is necessary to emphasize the fact that at the age of 14-18 years, the students' bodies being in the period of transformation and maturation, the consumption of O2 in the internal functional systems is increased, therefore the inhalation of a qualitative air, without pollutants, contributes to the acquisition a healthy lifestyle. Figure 15 presents the mean annual concentrations of SO2 resulted after pattern making. In the same manner of patterns (Figure 16), the map of iso-concentrations of SO2 for the 3rd daily maximum value is presented (used as reference by EU directives of air quality). These predictions were necessary to establish the training program so that the start of the training schedule should begin in the days and hourly intervals with the lowest concentrations, after which the intensity and the allotted time for the exercise should increase gradually.
The values in the Figures 1-7, are cumulative for NO, NO 2 , and NOx, and are expressed in µg/m 3 , and the evolution of the concentration of pollutants in certain days and hours was monitored, due to the fact that the physical activities took place during a certain period of the day.
Additionally, it is necessary to emphasize the fact that at the age of 14-18 years, the students' bodies being in the period of transformation and maturation, the consumption of O 2 in the internal functional systems is increased, therefore the inhalation of a qualitative air, without pollutants, contributes to the acquisition a healthy lifestyle. Figure 15 presents the mean annual concentrations of SO 2 resulted after pattern making. In the same manner of patterns (Figure 16), the map of iso-concentrations of SO 2 for the 3rd daily maximum value is presented (used as reference by EU directives of air quality).
Reporting to the imposed limits of EU directives requirements, it can be observed that the limit value is over-rated in the central city zone, both for the mean annual concentration for the ecosystem's protection (30 µg/m 3 comparing to VL = 20 µg/m 3 ), as for the 3rd daily maximum value.
The quality of the air in the environment has an influence on the time at which the equilibrium concentration of carboxyhemoglobin (COHb) is reached in the blood, which depends on both the carbon monoxide in the inspired air and on the volume of pulmonary ventilation. Thus, sustained physical activity depends on the initial value of carboxy-hemoglobin in the blood which, in the long run, contributes to maintaining the quality of life. The lack of physical activity and the inhalation of a polluted air can cause the occurrence of different nervous symptoms manifested through headaches, dizziness, digestive symptoms, and cardio-vascular symptoms, all starting with a COHb concentration of over 1% in the blood. Sustainability 2017, 9, x FOR PEER REVIEW  Reporting to the imposed limits of EU directives requirements, it can be observed that th value is over-rated in the central city zone, both for the mean annual concentration for the ecosy protection (30 μg/m 3 comparing to VL = 20 μg/m 3 ), as for the 3rd daily maximum value.
The quality of the air in the environment has an influence on the time at which the equil concentration of carboxyhemoglobin (COHb) is reached in the blood, which depends on bo carbon monoxide in the inspired air and on the volume of pulmonary ventilation. Thus, sus physical activity depends on the initial value of carboxy-hemoglobin in the blood which, in th run, contributes to maintaining the quality of life. The lack of physical activity and the inhala a polluted air can cause the occurrence of different nervous symptoms manifested th headaches, dizziness, digestive symptoms, and cardio-vascular symptoms, all starting with a concentration of over 1% in the blood.

Discussions
The National Education System in Romania groups the students by age and distributes th class, therefore, their biological development is relatively similar, and the students of the re study are in the value range 10.83-10.89 (9.84 + 0.99; 9.90 + 0.99), namely boys, and in the range 11.40-11.51 (10.38 + 1.02; 10.49 + 1.02), namely girls. But from a social and informational point o there are major differences throughout years between high school students, and the low obtained by HSS: Boys-59% (weak), 31% (satisfactory), and 10% (medium), girls-53.92% ( 34% (satisfactory), and 12.08% (medium), require finding solutions for this problem. The imp role, in this aspect, is played by the physical education lesson, which develops skills in a pedag context, but the insufficiency of the number of hours allocated weekly tends to determine ph inactivity with personal/individual, but also social effects that lead to health deterioration [37] "It is important that PETE educators work together with the physical education departm the local schools to support PETE students to effectively implement nonlinear informed appr in a school environment" [38], just to try to correct that "34.88% of girls and 21.26% of boys of 14 spent more time doing homework on school days and 24.32% of 14-year-old boys spent mor doing homework on days off" [39], which will affect the health status by acquiring disease repercussions on the quality of life [40][41][42]. Also, it is necessary to emphasize that between the 14 and 18 years is a period of transformation, and the consumption of O2 in the internal fun systems of the organism is increased, therefore, the physical activities, as well as the inhalatio qualitative air, without pollutants, contribute to the acquisition of a healthy life style. In this s development, generating ecological attitudes and sustainable actions have the role to contrib the achievement of the objectives of the physical education lesson by acquiring new skills, edu and sustainable training for future generations.
The low values obtained by boys: 15 students (9th grade), 18 students (10th grade), 11 st (11th grade), 15 students (12th grade), representing 59%, and by girls: 10 students (9th grad  orting to the imposed limits of EU directives requirements, it can be observed that the limit ver-rated in the central city zone, both for the mean annual concentration for the ecosystem's n (30 μg/m 3 comparing to VL = 20 μg/m 3 ), as for the 3rd daily maximum value. quality of the air in the environment has an influence on the time at which the equilibrium ation of carboxyhemoglobin (COHb) is reached in the blood, which depends on both the onoxide in the inspired air and on the volume of pulmonary ventilation. Thus, sustained activity depends on the initial value of carboxy-hemoglobin in the blood which, in the long tributes to maintaining the quality of life. The lack of physical activity and the inhalation of ed air can cause the occurrence of different nervous symptoms manifested through es, dizziness, digestive symptoms, and cardio-vascular symptoms, all starting with a COHb ation of over 1% in the blood.
sions National Education System in Romania groups the students by age and distributes them by refore, their biological development is relatively similar, and the students of the research in the value range 10.83-10.89 (9.84 + 0.99; 9.90 + 0.99), namely boys, and in the range value .51 (10.38 + 1.02; 10.49 + 1.02), namely girls. But from a social and informational point of view, major differences throughout years between high school students, and the low results by HSS: Boys-59% (weak), 31% (satisfactory), and 10% (medium), girls-53.92% (weak), isfactory), and 12.08% (medium), require finding solutions for this problem. The important is aspect, is played by the physical education lesson, which develops skills in a pedagogical but the insufficiency of the number of hours allocated weekly tends to determine physical with personal/individual, but also social effects that lead to health deterioration [37]. s important that PETE educators work together with the physical education department of schools to support PETE students to effectively implement nonlinear informed approaches ol environment" [38], just to try to correct that "34.88% of girls and 21.26% of boys of 14 years

Discussions
The National Education System in Romania groups the students by age and distributes them by class, therefore, their biological development is relatively similar, and the students of the research study are in the value range 10.83-10.89 (9.84 + 0.99; 9.90 + 0.99), namely boys, and in the range value 11.40-11.51 (10.38 + 1.02; 10.49 + 1.02), namely girls. But from a social and informational point of view, there are major differences throughout years between high school students, and the low results obtained by HSS: Boys-59% (weak), 31% (satisfactory), and 10% (medium), girls-53.92% (weak), 34% (satisfactory), and 12.08% (medium), require finding solutions for this problem. The important role, in this aspect, is played by the physical education lesson, which develops skills in a pedagogical context, but the insufficiency of the number of hours allocated weekly tends to determine physical inactivity with personal/individual, but also social effects that lead to health deterioration [37].
"It is important that PETE educators work together with the physical education department of the local schools to support PETE students to effectively implement nonlinear informed approaches in a school environment" [38], just to try to correct that "34.88% of girls and 21.26% of boys of 14 years spent more time doing homework on school days and 24.32% of 14-year-old boys spent more time doing homework on days off" [39], which will affect the health status by acquiring diseases with repercussions on the quality of life [40][41][42]. Also, it is necessary to emphasize that between the age of 14 and 18 years is a period of transformation, and the consumption of O 2 in the internal functional systems of the organism is increased, therefore, the physical activities, as well as the inhalation of a qualitative air, without pollutants, contribute to the acquisition of a healthy life style. In this stage of development, generating ecological attitudes and sustainable actions have the role to contribute to the achievement of the objectives of the physical education lesson by acquiring new skills, education, and sustainable training for future generations.
The low values obtained by boys: 15 students (9th grade), 18 students (10th grade), 11 students (11th grade), 15 students (12th grade), representing 59%, and by girls: 10 students (9th grade), 17 students (10th grade), 14 students (11th grade), 16 students (12th grade), representing 53.92%, denote the level of physical training of the HSS assimilated in the physical education lessons. Thus, highlighting the correlation between the manifestation of the level of anaerobic effort capacity of the HSS and the air quality in the environment related to the concentration of pollutants in the atmosphere, in which the physical activities are carried out, determines the need to find alternatives to practice physical activities for maintaining a healthy lifestyle. The fact that, in Romania, it will not be possible to regulate, in the near future, the increase of the number of physical education lessons, these solutions are required to carry out sustainable physical activities in unpolluted air places [32,43]. By practicing any kind of physical activity, the resistance of the students' bodies increases, this aspect generating a conscious approach and a sustainable development in the information society.
According to European norms that support sustainable conditions for the performance of physical activities with a role in improving the quality of life, it can be observed that the limit value concentrations of SO 2 are over-rated in the central city area, both for the mean annual concentration for the ecosystem's protection (30 µg/m 3 comparing to VL = 20 µg/m 3 ), as for the maximum recorded value. Also, the values obtained underlined the cumulative evolution (CU) of the NO, NO 2 , NOx pollutant concentration, recorded daily, in hours, in 4 centers, the closest to the high school. In this regard, the attention paid to climate change that influences the lifestyle, as well as the care taken to increase the quality of the breathable air by "placing the pollutant industrial parts far from the cities, as well as increasing the green surfaces influencing the meteorological phenomenon ensuring the rapid circulation of different gases (CO 2 consumption and releasing O 2 )" [1] contribute to the promotion of physical activity in the open air, using natural environmental factors [44,45]. These aspects require a more aggressive reconsideration and promotion of the benefits of sustainable physical activities on HSS' health by guiding them to places/spaces where they can carry out extracurricular physical activities, in a sustainable way, in an unpolluted environment, and also by making them aware of the long-term impact on their lifestyle.

Conclusions
The low values registered by the students during the PEL allow us to conclude that the insufficient number of physical education lessons has a negative impact on the level of manifestation of the capacity of anaerobic effort, which impose the need to increase the degree of HSS' independence by carrying out extra-class physical activities.
Concentrations from the different compounds of the breathable air during a day in Bucharest showed a significant decrease in the time interval 13-19, which allows the scheduling of intense sustainable physical activities that lead to the increase of the life quality and to the improvement of daily activities. The more intense the physical activities in this type of interval are, the more the air inhaled by the HSS contributes to balancing the vital functions of the body with a role in their healthy development.
The applicability of this study will allow the reassessment of the level of manifesting the anaerobic effort capacity of the HSS from different schools, starting with the localities in which the authors of the present work activate and which will support the physical education teachers in the implementation of these investigations. In this way we will develop skills and we will broaden their horizon of knowledge and socialization in a sustainable way.
Taking into account the reduced number of physical education lessons provided in the Romanian school curriculum for high school students with effects on their formation, there is a need to do extra-class physical activities, which provide sustainability in maintaining lifestyle. Even if the number of physical education lessons is not be increased in the near future, teachers from faculties and universities will be involved and will collaborate with school principals through different partnerships and information programs to promote the major benefits obtained by practicing extra-class physical activities at certain time when the concentration of polluting compounds in the breathable air is the lowest.

Key Limitations
Insufficient resources of information on how to efficiently record some values during the PEL, without affecting the structure of the lesson, have been negatively reflected in the rate of work we have initially intended in this study.
The difficulty of finding the number of students to be subjected to the study made the initial stage of forming the group to be investigated difficult. We have also encountered problems due to the reluctance of a large number of students to be part of the study because they felt that their exposure by performing these tests would affect their self-image compared to other colleagues.
Also, the instability of the students from the point of view of their personal beliefs, which are intensely manifested in this stage of their development, required an additional allocation of the authors' time for diversifying and motivating the speeches that supported the importance of doing the physical activities during the extracurricular period, since in the HSS' preferences, spending their extra-class time doing physical activities occupied the last place.