Understanding Stress: Definition, Impact, and Importance of Balance

Stress is one of the most commonly used words in everyday life, yet it remains widely misunderstood. We often treat stress as something entirely negative – a force that drains us, makes us anxious, and hurts our health. But here’s the thing: stress is not inherently bad. It is a dynamic, ongoing process that every human being experiences in response to the demands placed on them. In fact, the right amount of stress can sharpen your focus and push you to perform at your best. Understanding what stress really is – and how to manage it – is essential for anyone working in a demanding environment, especially educators.

What is stress? 🔗

Stress is the body’s natural response to any change, challenge, or demand that requires adaptation. It is not a one-time event but a continuous process that fluctuates throughout the day depending on the situations we face. Whether it’s a tight deadline, a classroom full of restless students, or a personal life challenge, our body reacts by activating the fight-or-flight response – increasing heart rate, releasing stress hormones like cortisol, and heightening alertness.

It is important to note that stress is not an illness in itself – it is a state of mind. However, when stress becomes excessive and prolonged, it can develop into mental and physical illness. The key lies in recognising that some pressure is necessary and even beneficial, while too much of it becomes harmful.

Defining stress: what do experts say? 🔗

Various researchers and organisations have attempted to define stress precisely. One of the most widely referenced definitions comes from the Health and Safety Executive (HSE), the UK’s workplace health and safety regulator. The HSE defines work-related stress as the adverse reaction people have to excessive pressures or other types of demand placed on them. This definition highlights two critical aspects: stress is a reaction (not the pressure itself), and it occurs when pressure becomes excessive.

Psychologist Richard Lazarus, one of the pioneers in stress research, proposed that stress arises from a person’s appraisal of a situation – specifically, when someone perceives that the demands placed on them exceed their ability to cope. This means stress is highly subjective. What one person finds overwhelming may feel perfectly manageable to another, depending on their skills, experience, personality, and available support.

Another important distinction, introduced by endocrinologist Hans Selye, is between two types of stress: eustress (positive stress) and distress (negative stress). Selye argued that not all stress is harmful – a concept we will explore in detail below.

Stress as a person-environment interaction 🔗

The modern understanding of stress views it as an interaction between the individual and their environment. A person experiences stress when they perceive that the demands of their work are greater than their ability to cope. Coping, in this context, means balancing the demands and pressures placed on you with your skills, knowledge, and resources. For instance, a teacher given an unrealistic deadline to complete student assessments without adequate support may begin to feel undue pressure – which, if sustained, leads to stress.

Positive vs negative stress: eustress and distress 🔗

One of the biggest misconceptions about stress is that all stress is bad. In reality, stress exists on a spectrum, and its impact depends largely on its intensity, duration, and how we perceive it.

Eustress: the good side of stress 🔗

Eustress, or positive stress, is the type of stress that motivates, energises, and drives us to take on challenges. It is typically short-term and arises from situations we perceive as manageable and rewarding. According to Healthline, eustress challenges you without depleting your resources and fosters personal growth in emotional, psychological, and physical dimensions.

Examples of eustress in a teacher’s life include preparing for an exciting new lesson, taking on a leadership role at school, or participating in a professional development workshop. These situations create pressure, but they also bring a sense of accomplishment and fulfilment. Research published in the journal Behavioral Sciences confirms that eustress is linked to positive emotional reactions, feelings of energy and vigour, and eagerness to perform well.

Distress: when stress becomes harmful 🔗

Distress, or negative stress, occurs when the demands on a person exceed their ability to cope, and they feel helpless or overwhelmed. Unlike eustress, distress is often prolonged and leads to anxiety, reduced performance, and physical health problems. The American Federation of Teachers notes that distress is the overwhelming, anxiety-inducing form of stress that can leave a person feeling debilitated and unable to focus or complete tasks.

Chronic distress has been linked to serious health outcomes including high blood pressure, heart disease, weakened immunity, depression, and burnout. For educators specifically, a scoping review published in the International Journal of Environmental Research and Public Health found that teachers often encounter psychological problems, decreased work quality, and increased absenteeism due to sustained occupational stress.

The thin line between eustress and distress 🔗

The boundary between positive and negative stress is not fixed. What begins as eustress can tip over into distress if the pressure continues without relief. A teacher who is initially excited about a new curriculum initiative may start feeling overwhelmed if the workload keeps piling up without breaks or support. The key factor is perception – whether you see a challenge as something within your control or as an insurmountable threat. Building personal coping skills and having adequate organisational support can help keep stress in its positive zone.

Stress and performance: the inverted-U relationship 🔗

How does stress affect our ability to perform? This is where one of the most well-known models in psychology comes in – the Yerkes-Dodson Law, developed by psychologists Robert Yerkes and John Dodson in 1908.

The Yerkes-Dodson Law describes an empirical relationship between arousal (or stress) and performance. It states that performance improves as stress increases – but only up to an optimal point. Beyond that point, further increases in stress cause performance to decline. This relationship is commonly depicted as an inverted U-shaped curve (also called a bell curve).

The three zones of the curve 🔗

The inverted-U curve can be divided into three zones:

Zone 1 – Too little stress (underarousal): When there is very little pressure or incentive, motivation drops. People feel bored, disengaged, and unchallenged. Performance remains low because there is no drive to act.

Zone 2 – Optimal stress: At a moderate level of stress, people are alert, focused, and motivated. This is the sweet spot where performance peaks. The pressure is enough to energise without overwhelming. This is where eustress operates most effectively.

Zone 3 – Too much stress (overarousal): When stress becomes excessive, cognitive functions like attention, memory, and problem-solving begin to break down. People experience anxiety, fatigue, and eventually burnout. Performance drops sharply.

The sitar string analogy 🔗

A helpful way to understand the stress-performance relationship is through the sitar string analogy. A sitar (or any stringed instrument) produces music only when the string is tuned to the right level of tension. If the string is too loose, it won’t produce any sound – just like a person with too little stress produces little output. If the string is tuned just right, it creates beautiful music – representing optimal performance under the right amount of pressure. But if the string is pulled too tight, it snaps – just as excessive stress can lead to a complete breakdown in performance, health, and well-being.

This analogy captures the essence of stress management: the goal is not to eliminate stress entirely but to find and maintain the right level of tension that enables you to perform at your best without breaking down.

Case study: stress in a teacher’s life 🔗

To bring these concepts to life, consider the example of Shibani, a secondary school teacher in her mid-thirties.

Shibani is passionate about teaching and deeply committed to her students. Over the past year, however, her workload has increased significantly. She has been assigned additional administrative duties, her class sizes have grown, and the school has introduced a new evaluation system that requires extensive documentation. On top of this, Shibani is managing responsibilities at home – caring for her ageing parents and supporting her children’s schoolwork.

Initially, Shibani thrived under the new demands. The challenge of adapting to the new evaluation system gave her a sense of purpose, and she enjoyed learning new skills. This was eustress at work – she felt motivated, engaged, and capable.

But as the weeks passed, the pressure kept mounting. The administrative tasks consumed her evenings and weekends, leaving her no time for rest or personal activities. She began experiencing headaches, difficulty sleeping, and irritability. Her enthusiasm for teaching started to fade, and she noticed herself becoming short-tempered with students – something she had never been before. This was the shift from eustress to distress.

Shibani’s situation perfectly illustrates the inverted-U curve in action. She started at the ascending part of the curve, where increasing demands boosted her performance. But once the pressure crossed her optimal threshold – without adequate support or recovery time – she moved to the descending side, where performance and well-being both declined.

What went wrong? 🔗

Several factors contributed to Shibani’s stress escalation. There was a mismatch between demands and resources – more work was assigned without additional time, training, or support. She had little control over her work schedule, a factor the HSE identifies as one of the six primary sources of workplace stress. And the lack of work-life balance meant she had no opportunity to recover and recharge.

Research supports this pattern. A RAND Corporation survey found that 46% of teachers reported being too tired for personal activities because of their jobs, compared to just 13% of similar working adults. Teachers who experienced greater challenges with work-life balance were more likely to report frequent job-related stress, difficulty coping, and symptoms of depression and burnout.

What could help? 🔗

For Shibani – and teachers like her – managing stress requires action at both the individual and organisational level. On a personal level, setting clear boundaries between work and home, prioritising self-care activities, and seeking support from colleagues or a counsellor can make a significant difference. At the organisational level, schools need to ensure that workload is reasonable, that teachers have a degree of autonomy and control, and that support systems are genuinely accessible.

The goal is to keep Shibani’s “sitar string” tuned just right – enough tension to produce excellent work, but not so much that it snaps.

Why balance matters 🔗

Understanding stress as a spectrum – not a binary of “stressed” or “not stressed” – is essential for managing it effectively. Everyone needs some level of pressure to stay motivated and perform well. The problem arises only when that pressure becomes chronic, uncontrollable, or disproportionate to our coping capacity.

For educators, this understanding is especially critical. Teaching is inherently a high-demand profession involving emotional labour, constant decision-making, and responsibility for student outcomes. A systematic review in the International Journal of Environmental Research and Public Health confirmed that teachers belong to a high-demand occupational group and frequently experience work-related challenges that contribute to burnout and reduced well-being.

The answer is not to avoid stress altogether – that would lead to stagnation and boredom (the left side of the inverted-U curve). Instead, the goal is to cultivate awareness of where you are on the stress spectrum at any given time, develop coping strategies to stay in the optimal zone, and advocate for systemic changes that reduce unnecessary stressors in the workplace.

What do you think? Have you ever experienced a moment when stress actually helped you perform better – and another when it completely overwhelmed you? How do you recognise when you have crossed the line from productive pressure to harmful stress?

References

1. https://www.hseni.gov.uk/what-work-related-stress
2. https://www.simplypsychology.org/what-is-the-yerkes-dodson-law.html
3. https://www.healthline.com/health/eustress
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC8872528/
5. https://www.aft.org/news/how-tell-difference-between-good-and-bad-stress
6. https://pmc.ncbi.nlm.nih.gov/articles/PMC9518388/
7. https://www.k12dive.com/news/teachers-work-life-balance-district-leader-policy-rand/802774/
8. https://pmc.ncbi.nlm.nih.gov/articles/PMC10298565/