haya.Learning made clear
Unit IV · Work simplification, body mechanics and fatigue
7 min readConcept sheetOften a 5- or 10-mark answer

Fatigue: types and management

Fatigue is tiredness that lowers work capacity. It is physiological (muscular) or psychological (boredom, worry), and is managed by planning, controlling and evaluating energy use.

MeaningReduced capacity for work after effort
TypesPhysiological and psychological
Physiological reliefRest, sleep and food
Psychological reliefInterest, variety, a change of task

Concept of fatigue

Fatigue is a state of tiredness in which the capacity to work falls: work becomes slower, poorer and more error-prone, and the worker feels weary. It is the body's warning signal to stop or change. Fatigue may be temporary, removed by rest, or cumulative (chronic), building up day after day when rest is not enough. A homemaker is especially at risk because her work has no fixed hours, many tasks are repetitive, and physical, mental and emotional demands come together.

Physiological and psychological fatigue

PointPhysiological fatiguePsychological fatigue
Also calledPhysical or muscular fatigueMental or emotional fatigue
CauseHard or long muscular work; in the textbook explanation, waste products such as lactic acid build up and the muscles' energy stores fallBoredom, monotony, worry, frustration, dislike of the task, lack of interest or appreciation
Felt asAching, heavy muscles and slower movementsFeeling 'fed up', irritable and unwilling to start, even when the body has done little
Relieved byRest, sleep and good foodInterest, variety, a change of task, praise, pleasant surroundings, sharing worries
Home exampleWashing a week's clothes by handWashing vessels alone after every meal, day after day, with no help or thanks

Managerial process applied to energy

StepWhat the homemaker does
PlanningStudy the energy each task needs; spread heavy tasks across the day and week; alternate heavy and light work; plan rest periods; simplify work and use good equipment; share tasks
ControllingEnergizing: begin demanding tasks at the time of best efficiency. Checking: watch for early signs of fatigue (slowing down, mistakes, irritability). Adjusting: take a break, change the task, slow the pace or ask for help
EvaluatingAfter the day or week, ask: was the work done without undue tiredness? Which tasks caused most fatigue? Then revise the plan, work heights, methods or sharing

Ways to reduce fatigue

  • Use good posture and body mechanics; sit for long tasks.
  • Apply work simplification: fewer steps, correct heights, better tools.
  • Take short, frequent rests before fatigue builds up.
  • Alternate heavy and light tasks, and pleasant and unpleasant ones.
  • Add interest: music while working, working alongside family members, trying new methods.
  • Keep the surroundings pleasant: good light, ventilation and a comfortable temperature.
  • Eat regular, balanced meals and sleep enough.
In food service and dietetics

Poor nutrition makes fatigue worse. Iron-deficiency anaemia, common among Indian women, lowers the oxygen reaching working muscles, and a skipped breakfast leaves little energy for the morning peak load. Regular, balanced meals with iron-rich foods (greens, ragi, pulses) plus vitamin C help a homemaker work without early fatigue.

Exam angle

2 marks: “Distinguish between physiological and psychological fatigue.” Physiological fatigue comes from muscular work and is relieved by rest; psychological fatigue comes from boredom, worry or dislike and is relieved by interest and variety.

5 marks: “What are the causes of fatigue and how can it be reduced?” Give physical and psychological causes, then ways to reduce it: body mechanics, work simplification, rest periods, variety, pleasant surroundings and good nutrition.

10 marks: “Explain the types of fatigue and the managerial process applied to energy.” Define fatigue, compare the two types in a table, then apply planning, controlling (energize, check, adjust) and evaluating to energy use, with examples.

Remember it

Body tired → rest. Mind tired → change. Physiological fatigue needs rest; psychological fatigue needs interest and variety.