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What are the limitations of using metabolic equivalents (METs) to measure exercise intensity?
The limitations of MET's are:
- it is only an approximation of energy expenditure.
- There could be potential errors in using the 1.0 MET(resting metabolic rate) as the constant resting value.
- Does not take into account age, sex, muscle mass or disease states.
- Only be used as a guideline for training in a general sense.

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Compare and contrast the health-related components of physical fitness and the skill-related physical fitness.

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Compare and contrast the health-related components of physical fitness and the skill-related physical fitness.

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•	Explain the difference between primary and secondary prevention

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•	Explain the difference between primary and secondary prevention

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-Primary tries to prevent disease before it occurs, this often focuses on healthy individuals.
-Secondary tries to reduce the progression of a disease, focuses on unhealthy individuals.

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Explain what was found in the early studies of London bus drivers and conductors in the 1950s.

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Explain what was found in the early studies of London bus drivers and conductors in the 1950s.

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Different methods of measuring exercise intensity

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Different methods of measuring exercise intensity

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- Maximal oxygen consumption
- Oxygen consumption reserve
- Heart rate reserve
- Maximal Heart Rate
- Metabolic Equivalent

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physical activity- any bodily movement produced by skeletal muscle that requires energy expenditure.

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What types of studies are mostly used as evidence for the health benefits of physical activity? Describe the strengths and limitations of these types of studies.

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What types of studies are mostly used as evidence for the health benefits of physical activity? Describe the strengths and limitations of these types of studies.

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Cohort studies (longitudinal studies)-typically observe large groups of individuals, recording their exposure to certain risk factors to find clues as to the possible causes of disease.
STRENGTHS:

-        Identify cohort, representative of population

-        Follow over many years

-        Collects data on exposures and outcomes

-        Data rich

-        Same people are measured, so minimises the effects of other variables

LIMITATIONS:

-        Attrition (drop out/ mortality)

-        Familiarity with the experiment

-        Non equivalence of those who dropped out with those who stayed in

Others include:
- Laboratory- based studies
- Large scale population- based observation studies

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physical fitness- your ability to carry out tasks without undue fatigue. the components of this are, cardiorespiratory endurance, muscle strength, muscle endurance, flexibility and body composition.

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exercise- activity requiring physical effort, carried out to sustain or improve health and fitness.

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•	Explain the curvilinear relationship between physical activity and health.

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•	Explain the curvilinear relationship between physical activity and health.

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individuals who are sedentary/ get minimal physical activities benefit the most from the relatively modest increases in physical activities and fitness in terms of improvement in health status.
individuals who already meet their minimum requirements of weekly physical activities are likely to derive some additional health and fitness benefits from becoming more physically active.

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•	List the different domains of physical activity.

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•	List the different domains of physical activity.

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- Leisure, sport, exercise, transport, occupation, house and yard