In the previous article, we explored the fundamentals of stress, including its causes and how it affects our mental well-being.
Now, let’s dive deeper into the physical impact of stress on the body.
While stress is often viewed as a mental or emotional challenge, it triggers a cascade of physiological responses that can affect multiple systems. From immediate symptoms like headaches and muscle tension to long-term risks such as cardiovascular disease and weakened immunity, stress can have profound and lasting effects on physical health.
In this article, we’ll examine how stress manifests in the body and the consequences it can have over time.
Physical Impact of Stress
Stress is a natural response to challenging situations, but when it becomes chronic or overwhelming, it can take a toll on both mental and physical health. In the short term, stress can be beneficial, triggering the “fight or flight” response that helps us respond to danger.
However, prolonged stress can lead to a range of physical symptoms and long-term health risks that significantly affect the body’s well-being. This article explores the physical manifestations of stress, long-term health risks, and its impact on sleep and weight.
Physical Symptoms of Stress
Stress can manifest in various physical symptoms, acting as a signal that the body is under pressure. Below is an elaboration on these symptoms-
- Headaches- Stress is a major trigger for tension-type headaches and migraines. Muscle contraction and tightening during stress lead to muscle tension, particularly in the neck, shoulders, and back (Borsook, 2016).
- Fatigue and Exhaustion- Stress causes the body to release adrenaline and cortisol, which initially boosts energy but leaves the individual feeling drained afterward (McEwen, 2017). Persistent stress can lead to constant fatigue and exhaustion, depleting physical and mental energy.
- Gastrointestinal Issues- Stress disrupts the normal function of the digestive system, leading to problems like stomach aches, bloating, and irritable bowel syndrome (IBS). The brain-gut connection plays a role, with stress affecting how the digestive system operates (Mayer, 2011).
- Weakened Immune System- The stress response redirects energy away from the immune system, weakening its function. Chronic stress increases susceptibility to infections and illnesses, as shown by a study where individuals under stress were more likely to catch colds and have prolonged illnesses (Cohen et al., 2012).
- Cardiovascular Risks- Stress prompts the heart to work harder, raising heart rate and blood pressure. Over time, this increases the risk of hypertension, heart palpitations, and heart attacks (Steptoe & Kivimäki, 2013). Chronic stress contributes to cardiovascular disease due to prolonged exposure to stress hormones.
Long-Term Health Risks
Chronic stress can lead to significant long-term health risks, affecting various bodily systems. Key points on the dangers of chronic stress are:
- Heart Disease and Diabetes- Prolonged stress elevates blood pressure, increasing the risk of coronary artery disease, heart attacks, and other cardiovascular issues (Dimsdale, 2008). Stress can disrupt blood sugar regulation, contributing to the onset of type 2 diabetes by affecting insulin resistance and glucose levels (Hackett & Steptoe, 2017).
- Immune System Suppression- Chronic stress leads to prolonged cortisol release, which suppresses the immune system. This reduced immune function makes the body more vulnerable to infections and increases the risk of autoimmune diseases, where the immune system attacks its own healthy tissues (Cohen et al., 2012).
- Accelerated Aging- Chronic stress has been linked to shortened telomeres, which protect chromosome ends. Shortened telomeres lead to premature aging and raise the likelihood of developing age-related diseases (Epel et al., 2004).
These long-term effects show how chronic stress can have a cumulative impact, leading to severe health problems if not properly managed.
Stress and Sleep
Sleep is vital for maintaining overall health, and stress can severely disrupt sleep patterns. Stress triggers a hyperarousal state, making it difficult to fall asleep or stay asleep.
The body’s heightened alertness, even at night, results in insomnia and restless nights (Kalmbach et al., 2018). Insomnia, in turn, exacerbates stress, creating a vicious cycle where lack of sleep leads to higher stress levels, which then cause further sleep disturbances.
A study by Morin et al. (2015) found that people with higher stress levels reported poorer sleep quality and difficulty initiating and maintaining sleep.
Sleep deprivation impairs cognitive function, mood, and overall physical health, exacerbating the effects of stress. Additionally, chronic sleep deprivation due to stress can lead to other health issues such as weight gain, weakened immunity, and cardiovascular problems (Meerlo et al., 2008).
Stress and Weight
Stress has a direct impact on eating habits, often leading to unhealthy behaviors like overeating or undereating. When stressed, some individuals find comfort in food, particularly high-calorie, sugary, or fatty foods, leading to weight gain.
This phenomenon, often referred to as “stress eating,” is linked to the body’s release of cortisol (Adam & Epel, 2007). Cortisol increases appetite and cravings for carbohydrate-rich foods, which provide quick energy but can result in excess calorie consumption.
Conversely, others may experience a loss of appetite during stress, resulting in undereating and unintentional weight loss. Stress can also affect metabolism, causing it to slow down in response to prolonged periods of emotional or mental strain (Torres & Nowson, 2007).
Moreover, cortisol plays a significant role in stress-related weight gain. Elevated cortisol levels promote the accumulation of fat, particularly visceral fat around the abdomen. Visceral fat is particularly concerning as it increases the risk of developing metabolic conditions like insulin resistance, type 2 diabetes, and cardiovascular diseases (Kyrou et al., 2018).
Conclusion
Stress has far-reaching physical consequences that, if not managed, can contribute to serious health problems. From the immediate symptoms like headaches and muscle tension to the long-term risks of heart disease and weakened immunity, stress impacts nearly every system in the body. It can disturb sleep, alter eating habits, and even lead to chronic conditions. Understanding these effects can help individuals take steps to manage stress more effectively and prevent the negative health outcomes associated with it.
References
Adam, T. C., & Epel, E. S. (2007). Stress, eating, and the reward system. Physiology & Behavior, 91(4), 449-458.
Borsook, D. (2016). A painful journey: From mouse to man in pain genetics and genomics. Neuroscience, 338, 153-168.
Cohen, S., Janicki-Deverts, D., & Miller, G. E. (2012). Psychological stress and disease. JAMA, 298(14), 1685-1687.
Dimsdale, J. E. (2008). Psychological stress and cardiovascular disease. Journal of the American College of Cardiology, 51(13), 1237-1246.
Epel, E. S., Blackburn, E. H., Lin, J., Dhabhar, F. S., Adler, N. E., Morrow, J. D., & Cawthon, R. M. (2004). Accelerated telomere shortening in response to life stress. Proceedings of the National Academy of Sciences, 101(49), 17312-17315.
Hackett, R. A., & Steptoe, A. (2017). Type 2 diabetes mellitus and psychological stress—a modifiable risk factor. Nature Reviews Endocrinology, 13(9), 547-560.
Kalmbach, D. A., Anderson, J. R., & Drake, C. L. (2018). The impact of stress on sleep: Pathogenic sleep reactivity as a vulnerability to insomnia and circadian disorders. Journal of Sleep Research, 27(6), e12710.
Kyrou, I., Chrousos, G. P., & Tsigos, C. (2018). Stress, visceral obesity, and metabolic complications. Annals of the New York Academy of Sciences, 1148(1), 214-230.
Mayer, E. A. (2011). Gut feelings: The emerging biology of gut–brain communication. Nature Reviews Neuroscience, 12(8), 453-466.
McEwen, B. S. (2017). Neurobiological and systemic effects of chronic stress. Chronic Stress, 1, 1-11.
Meerlo, P., Sgoifo, A., & Suchecki, D. (2008). Restricted and disrupted sleep: Effects on autonomic function, neuroendocrine stress systems, and stress responsivity. Sleep Medicine Reviews, 12(3), 197-210.
Morin, C. M., Rodrigue, S., & Ivers, H. (2015). Role of stress, arousal, and coping skills in primary insomnia. Psychosomatic Medicine, 67(2), 259-267.
Steptoe, A., & Kivimäki, M. (2013). Stress and cardiovascular disease. Nature Reviews Cardiology, 9(6), 360-370.
Torres, S. J., & Nowson, C. A. (2007). Relationship between stress, eating behavior, and obesity. Nutrition, 23(11-12), 887-894.