Awareness about the effect of stress on muscles among undergraduate students

Shifa Jawahar Ali1, Gayatri Devi R*2, Gifrina Jayaraj3 1Saveetha Dental college and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai – 77, TamilNadu, India 2Department of Physiology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences (SIMATS), Saveetha University, Chennai – 77, TamilNadu, India 3Department of Oral Pathology, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai – 77, TamilNadu, India


INTRODUCTION
Stress affects the body in many ways and causes a headache, increases blood pressure, heart prob-lems, asthma, insomnia, fatigue and weakens the body's immune system (Rj and R, 2016;Dave and Preetha, 2016;Renuka and Sethu, 2015). The psychological effect of stress includes poor concentration, irritability and reduced memory (Yaribeygi et al., 2017). Psychological stress is assumed to contribute to the development of musculoskeletal disorders, especially in the neck and shoulder (Lundberg, 2003). When the body is stressed, muscles tense up as a re lex action to protect the body against injury. Chronic stress will cause the muscles in the body to be in a state of constant guardedness and leads to stiffness of muscles. This causes muscle pain. Headache, which is again a muscle pain, is also associated with muscle tension. Relaxation techniques or stress-relieving activities are found to be effec-tively reducing muscle pain and stress-related disorder (Dunford and Thompson, 2010). Generalized anxiety disorder patients were reported to feel tensed and often experience a feeling of tightness. Muscle relaxation therapy was found to be effective to decrease the sense of tightness (Pluess et al., 2009). Depression and anxiety were found to have an association with pain conditions like arthritis, migraine and back pain (McWilliams et al., 2004). Stress and musculoskeletal disorders are the most common causes of work-related ill health, and they frequently occur together, having an in luence on each other. In general, stress is required for survival, but too much of it leads to health and mental problems. Pain and stress both affect the body's homeostasis and share a common behavior of failure to destroy negative memories (Abdallah and Geha, 2017). Stress weakens the immune system and makes the person prone to many diseases (Timothy et al., 2019;R and G, 2018). People living in modern society are exposed to more amount of stress, and studies have shown that stress inhibits attempts to perform physical activity. Reducing physical activities can also be a cause of developing muscle pain (Koo and Kim, 2018;Swathy and Sethu, 2015).  Occupational stress increases the risk of musculoskeletal symptoms at work (Soteriades et al., 2019;Abigail et al., 2019). These symptoms, in turn, affect productivity (David et al., 2019). Migraine, which is muscle pain, is mainly caused by repeated stress (Maleki et al., 2012). Awareness about the effect of stress on muscles is important because increasing our knowledge about the effect of stress on our body will help us not to stress over small problems in life. Reduced stress will make our body healthier and help us to lead a happy life. Modern lifestyle has caused an increase in stress levels, obesity and occurrence of various diseases and disorders (Samuel and Devi, 2015;Shruthi and Preetha, 2018;Choudhari and Jothipriya, 2016). Obesity caused due to less physical activity has adverse effects on health (Baheerati and Devi, 2018;Fathima and P, 2016). For the people who are under stress, stress-relieving activities and therapies can be done to reduce muscle tension and decrease the occurrence of certain stress-related disorders such as headache and increase a sense of well-being. These activities also improve mood and daily function. The aim of this study is to analyze the awareness level about the effect of stress on muscles in undergraduate students.

Study design
A cross-sectional survey was conducted among undergraduate students to evaluate the awareness of the effect of stress on muscles. The sampling method is simple random sampling method. The sample size of this study is 100. The participants did the survey voluntarily, and no incentives were given to them. The study was conducted in the month of May 2020. The study was approved by the Institutional Review Board after getting informed consent from the participants. Figure 10: Pie chart showing that 70% know that stress is a cause of migraine (blue) and 30% were not aware (green).

Survey Instrument
The survey instrument, which was a questionnaire, was prepared after an extensive review of the existing literature. The questionnaire was reviewed, and amendments were made to improve the clarity of the questions to eliminate ambiguous responses. The questionnaire consisted of 16 questions with both open and closed-ended questions. The questionnaire was shared to undergraduate students using the online survey platform.

Data analysis
Only completed surveys were taken for analysis, and the incompleted surveys were eliminated. The statistical test used is descriptive statistics. All the responses obtained were tabulated, and the reliability of the data was checked. Frequency table was prepared for each question using SPSS data analysis software version 20. Figure 12: Pie chart showing that 65% of the participants were aware that muscle tension caused due to stress (blue) and 35% not aware (green).

RESULTS AND DISCUSSION
Out of the 100 participants, 50% of the participants belong to the age group of 17 to 19, 22% of the participants belong to the age group of 20 to 22, and the remaining 28% of the participants were more than 22 years (Figure 1). 63% of the participants were females, and 37% of the participants were males (Figure 2). 82% of the participants said that they had experienced muscle pain, and the remaining 18% have not experienced muscle pain (Figure 3). 24% of the participants often experience muscle pain, 45% sometimes experiences muscle pain, 24% very rare, and 7% have never experienced muscle pain (Figure 4). 57% of the participants know the causes of muscle pain, whereas 43% of the participants do not know the causes of muscle pain (Fig-ure 5). Majority of the participants, 69% said that their life is stressful, and 31% of the participants said that their life is not stressful (Figure 6). 40% of the participants get a headache when stressed, 30% does not, and the other 30% sometimes get a headache when stressed (Figure 7).

Figure 13
: Pie chart showing that 60% of the participants were aware that muscle tension is are lex reaction to stress (blue) and 40% of the participants were not aware (green). Figure 14: Pie chart showing that 57% of the participants were aware that stress also affects joints along with muscles (blue) and 43% not aware (green).
58% of the participants were aware that muscle pain is the common side effect of stress, and 42% were not aware (Figure 8). 64% of the participants have a friend or relative who has a migraine, whereas the other 36% did not (Figure 9). 70% of the participants were aware that stress causes migraine and 30% were not aware ( Figure 10). 72% of the people were aware of physical symptoms of stress, whereas the remaining 28% were not aware (Figure 11). 65% of the participants know that muscle tense up during stress conditions, and 35% did not know ( Figure 12). 60% of the participants were aware that muscle tension is a re lex reaction to stress, 40% were not aware ( Figure 13). 57% of the participants were aware that stress affects joints also, whereas 43% of the participants were not aware ( Figure 14). 56% of the participants know that headache is associated with chronic muscle tension in the area of the shoulders, neck and head while 44% were not aware ( Figure 15). 53% of the participants agreed that hormones released during stress decrease muscle strength, while the remaining 47% were not aware ( Figure 16). In the chi-square analysis between gender and experiencing muscle pain, the p-value obtained was 0.664, and it was statistically not signi icant (Figure 17). In the chi-square analysis between gender and awareness of the causes of muscle pain, the p-value obtained was 0.703, and it was statistically not signi icant (Figure 18). In the chi-square analysis between gender and awareness of stress causes migraine, the p-value obtained was 0.190, and it was statistically not signi icant (Figure 19). In the chi-square analysis between gender and awareness of muscle pain is the common side effect of stress, the p-value obtained was 0.518, and it was statistically not signi icant (Figure 20). In the chi-square analysis between gender and awareness of stress causes muscle tension, the p-value obtained was 0.185, and it was statistically not signi icant (Figure 21).   Figure 17 shows that the X-axis represents the gender, and Y-axis represents the prevalence of muscle pain in the participants. Out of the 24% of the participants who get muscle pain often (violet), 17% are females, and 7% are males. Out of the 44% of the participants who get muscle pain sometimes (cream), 29% constitutes females, and 15% constitutes males. Hence, more females get muscle pain often than males. Chi-square test was done, and the association was found to be statistically not significant. Pearson's chi-square value: 1.578, DF -3, pvalue: 0.664(>0.05). Figure 18 shows that the Xaxis represents the gender, and Y-axis represents the awareness of the causes of muscle pain in the participants. Out of the 57% of the participants who are aware of the causes of muscle pain (blue), 35% constitutes females, and 22% constitutes males. Hence, more females were aware than males. Chi-square test was done, and the association was found to be statistically not signi icant. Pearson's chi-square value: 0.145, DF -1, p-value: 0.703(>0.05). Figure 19 shows that the X-axis represents the gender, and Y-axis represents awareness of stress causes migraine in the participants. Out of the 70% of the participants who were aware that stress causes migraine (blue), 47% constitutes females, and 23% constitutes males. Hence, more females were aware than males. Chi-square test was done, and the association was found to be statistically not signi icant. Pearson's chi-square value: 1.718, . Figure 20 shows that the X-axis represents the gender and Y-axis represents the awareness of muscle pain as the common side effect of stress in the participants. Out of the 58% of the participants who were aware that muscle pain as the common side effect of stress (blue), 35% constitutes females, and 23% constitutes males. Hence, more females were aware than males. Chi-square test was done, and the association was found to be statistically not signi icant. Pearson's chi-square value: 0.418, DF -1, p-value: 0.518(>0.05). Figure 21 shows that the X-axis represents the gender, and Y-axis represents awareness of stress causes muscle tension. Out of the 58% of the participants who were aware that stress causes muscle tension (blue), 35% constitutes females, and 23% constitutes males. Hence, more females were aware than males. Chi-square test was done, and the association was found to be statistically not signi icant. Pearson's chi-square value: 1.754, DF -1, p-value: 0.185(>0.05). The relation between stress and muscle pain is supported by our study. Stress causes many damages to the body and weakens the immune system thereby making us prone to many diseases and disorders (Harsha et al., 2015;Iyer et al., 2019). In a study conducted to examine the relationship between stress and health, 33.7% perceived that stress affected their health. In our study, only 54% agreed that stress decreases muscle strength, and 46% did not know that stress affects muscle strength. The slight difference is seen in the results (Keller et al., 2012). One of the previous studies revealed that people belonging to the age group of 61 to 70 have maximal stress, 71 to 80 years experience mild stress and people more than 80 years experienced minimal stress. Our study included young adults; 69% of them said they have a stressful life. Similar results are seen in all age groups with very slight variations (Poornima, 2014).

Figure 21: Bar graph represents the association between gender and awareness of stress causes muscle tension.
A study was conducted with a large sample size in Japan, 15 years and older people took part in a survey. Only 11.6% of them were aware that their headache is migraine. 74.2% complained that migraine affects their day to day life. Our study, 68% of the participants knew that stress causes migraine; hence awareness is higher in our study (Sakai and Igarashi, 1997). Another study conducted in Spain about the prevalence of migraine, 8.4% have a strict migraine, 4.2% of them experience portable migraine. In our study, 64% of the participants have a relative or friend who has a migraine. Hence, the results are similar (Matías-Guiu et al., 2011).
Another study was conducted about sex differences in muscle pain; no signi icant difference was found except that women tend to view exercise as more effective to reduce muscle pain than men. Our study also has similar results and no signi icant difference seen in awareness of males and females (Dannecker et al., 2008). Some of the limitations in this study include the smaller samples size of 100. Larger sample size will give more accurate data. Wide variety of population can be included, our study only undergraduate students were included.

CONCLUSIONS
From the results obtained, we can conclude that a moderate level of awareness is seen in undergrad-uate students about the effect of stress on muscles. More awareness is required among students who will make them understand that they should not stress over small things as stress only causes harm to our mind and body.