What are the components of fitness, and how are valid and reliable fitness tests used to assess and monitor an athlete?
Identify the health and skill related components of fitness and explain how fitness tests are used to assess them validly and reliably
A focused answer to the WACE Year 12 Physical Education Studies Unit 3 content on fitness components and testing. The health related and skill related components of fitness, matching tests to components, the meaning of validity and reliability, and how protocols and pre-test conditions are controlled to give trustworthy results.
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What this dot point is asking
WACE expects you to list and classify the fitness components, match an appropriate test to each, and explain validity and reliability. Selecting a valid, reliable test for a stated component and justifying it is the common task.
Health related components
These relate to general health and the body's ability to function. Aerobic capacity (cardiorespiratory endurance) is the ability to sustain activity using oxygen. Muscular strength is the maximum force a muscle can exert. Muscular endurance is the ability to repeat contractions over time. Flexibility is the range of movement at a joint. Body composition is the proportion of fat to lean mass.
Skill related components
These relate to performance in sport. Speed is how fast the body or a part moves. Power is force applied quickly, combining strength and speed. Agility is the ability to change direction quickly and accurately. Balance is maintaining equilibrium. Coordination is using body parts together smoothly. Reaction time is the time from a stimulus to the start of a response.
Matching tests to components
Each component has standard tests. Aerobic capacity is measured by the multistage fitness (beep) test or a Cooper run. Muscular strength is measured by a one repetition maximum lift or a grip dynamometer. Flexibility is measured by the sit and reach test. Speed is measured by a timed sprint. Power is measured by a vertical jump test. Agility is measured by the Illinois agility run. Reaction time is measured by a ruler drop test. Choosing the test that targets the specific component is essential.
Validity
A test is valid if it actually measures the component it claims to measure. The beep test is a valid measure of aerobic capacity because it taxes the cardiorespiratory system over progressive stages. A test that measured something else, or relied heavily on skill the athlete lacks, would not be valid for the intended component.
Reliability
A test is reliable if it produces consistent results when repeated under the same conditions. Reliability is improved by following a standard protocol every time, using the same equipment, giving the same instructions and warm up, testing at the same time of day, and controlling the athlete's preparation such as rest, hydration and recent food. Without these controls, a change in score might reflect different conditions rather than a real change in fitness.
How this maps to the exam
Questions ask you to identify components for a sport, select tests, or evaluate a test's validity and reliability. Classify the component as health or skill related, name a test that targets it, then explain validity (right component) and reliability (consistent conditions and protocol).