Staying healthy at work

30 min

Healthy body, healthy business

Mutoni runs a small accounting firm in Kigali. Her six staff sit at screens for most of the day. In one year they took a total of 41 sick days: back pain, headaches, tired eyes, two bouts of stress-related illness. None of it came from a dramatic accident. Most workplace ill health builds slowly, from how people sit, move, eat, rest and cope with pressure. (An illustrative firm.) This last lesson is about the everyday habits, for employees and employers, that keep people healthy at work.

Definition

Well-being: a state of physical, mental and social health in which a person can cope with normal stresses and work productively. Ergonomics: designing work, equipment and workplaces to fit the people who use them. Sedentary behaviour: time spent sitting or lying with very little movement while awake.

Definition

Work-related stress: the harmful reaction people have when the demands of work exceed their ability to cope. Burn-out: a syndrome of chronic workplace stress that has not been successfully managed, marked by exhaustion, mental distance from one's job and reduced effectiveness; WHO classes it as an occupational phenomenon, not a medical condition (ICD-11, 2019).

Sitting well

Good posture spreads the load on the back, neck and wrists. Even good posture becomes harmful if it lasts all day, so change position and get up to move regularly. For tired eyes, eye doctors suggest the 20-20-20 rule: every 20 minutes, look at something about 6 metres (20 feet) away for 20 seconds (American Academy of Ophthalmology).

Habits that protect health

Area	Healthy practice	Why
Physical activity	WHO (2020): adults should do 150 to 300 minutes of moderate activity a week, or 75 to 150 minutes of vigorous activity, plus muscle-strengthening on 2 or more days; every move counts	Lowers the risk of heart disease, diabetes, depression and back pain
Breaks and rest	Short breaks in long tasks; a proper lunch break; rest days and annual leave actually taken	Restores attention and prevents fatigue and errors
Food and water	Regular meals with vegetables, fruit and whole grains; clean drinking water through the day	Energy and concentration; avoids dehydration headaches
Sleep	Enough regular sleep; avoid screens late at night	Tired workers make more mistakes and have more accidents
Stress	Plan and prioritise work; talk to a manager early; support colleagues; seek help when needed	Prevents burn-out and conflict
Substances	No alcohol or drugs at work; avoid tobacco	Impair judgement and cause accidents and long-term disease
Check-ups	Regular medical and eye checks; vaccinations needed for the job	Finds problems early

Worked example 1: does Mutoni meet the WHO guideline?

Mutoni walks briskly to and from work, 25 minutes each way, 5 days a week (moderate activity), and plays football for 40 minutes on Saturdays (vigorous activity). One minute of vigorous activity counts as about two minutes of moderate activity.

Moderate: $25 \times 2 \times 5 = 250$ minutes. Vigorous, as moderate: $40 \times 2 = 80$ minutes.

Total: $250 + 80 = 330$ moderate-equivalent minutes a week, above the 150 to 300 range. If she took a minibus instead of walking, she would have only 80 minutes and would fall short.

Worked example 2: body mass index

Body mass index (BMI) compares weight with height. For an adult of mass $m$ kilograms and height $h$ metres:

\text{BMI} = \frac{m}{h^{2}}

A worker weighs 82 kg and is 1.75 m tall: $\text{BMI} = \frac{82}{1.75^{2}} = \frac{82}{3.0625} \approx 26.8$ . WHO classes adult BMI of 18.5 to 24.9 as normal weight and 25 or more as overweight, so this worker is overweight. BMI is only a screening tool: a very muscular person can have a high BMI and be healthy.

Worked example 3: is a wellness programme worth it?

A company of 50 workers averages 6 sick days per worker a year; each day of absence costs about Frw 12,000 in wages and lost output (illustrative). A wellness programme (an ergonomic check of every desk, a weekly exercise session and stress training) costs Frw 1,200,000 a year and is expected to cut sick days by a third.

Cost of absence now: $50 \times 6 \times 12{,}000 = 3{,}600{,}000$ francs. Saving: $\frac{3{,}600{,}000}{3} = 1{,}200{,}000$ francs.

Evaluation: the programme just pays for itself in sick days alone; better morale, fewer mistakes and keeping good staff are extra benefits, so it is likely to be worthwhile.

Warning

Mental health is health. Long-lasting tiredness, irritability, poor sleep or loss of interest can be signs of stress or depression. They are not weakness. Talk to someone you trust, a manager or a health worker; employers should treat such conversations confidentially and adjust workloads where they can.

World Health Organization, "Every Move Counts". Listen for how much activity WHO recommends for adults, and for small ways to add movement to a working day.

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Practice

Define ergonomics, sedentary behaviour and burn-out.
Describe four features of a good seated working posture.
State WHO's 2020 physical activity guideline for adults.
A worker cycles to work for 20 minutes each way on 5 days (vigorous) and walks for 30 minutes on Sunday (moderate). Find the weekly total in moderate-equivalent minutes.
Calculate the BMI of a worker who weighs 58 kg and is 1.68 m tall, and classify it.
Suggest four things the owner of a busy restaurant could do to reduce stress among her staff.
"Staff health is the employee's private business, not the employer's." Evaluate this statement.

Show answersHide answers

Ergonomics: designing work, equipment and workplaces to fit people. Sedentary behaviour: time spent sitting or lying with little movement while awake. Burn-out: chronic workplace stress that has not been managed, with exhaustion, distance from the job and reduced effectiveness.
Any four: screen top at or just below eye level; screen about an arm's length away; back supported; wrists straight and elbows about 90°; knees about level with hips; feet flat on the floor; regular changes of position.
150 to 300 minutes of moderate activity a week, or 75 to 150 minutes of vigorous activity (or an equivalent mix), plus muscle-strengthening activities on 2 or more days, and less sedentary time.
Vigorous $20 \times 2 \times 5 = 200$ minutes, worth $400$ moderate minutes; plus 30: total 430 moderate-equivalent minutes.
$\frac{58}{1.68^{2}} = \frac{58}{2.8224} \approx 20.5$ : normal weight.
For example: plan shifts fairly and publish rotas early; ensure proper breaks and a place to rest; enough staff at peak times; clear roles; listen to complaints and act; train staff to handle difficult customers; recognise good work.
Partly true: workers make their own choices about diet and exercise. But employers shape working hours, posture, workload, breaks, harassment and stress, and the law makes them responsible for health and safety at work (Article 77). Healthy staff are also more productive and take fewer sick days. A balanced view: health is a shared responsibility, and the employer's part is large.

1Healthy body, healthy business

2Sitting well

3Habits that protect health

Healthy body, healthy business

Sitting well

Habits that protect health