Unit 05 · Physical Fitness & Exercise Science
Fitness is about what your body can do, and it can be studied with data. This unit covers the components of fitness — cardiovascular endurance, strength, and flexibility — how heart rate and recovery reveal what’s happening inside, and how the body adapts to activity over time. You’ll measure fitness the way a scientist would, using something like heart-rate recovery, and read the numbers as evidence about function — never as a judgment about physique, size, or looks. Mastery means you can measure a real fitness marker and explain what it tells you about how your body works.
| Criterion | Not yet | Approaching | Mastered |
|---|---|---|---|
| Components of fitness | Thinks fitness is a single thing rather than several distinct components. | Names one or two components but cannot distinguish what each one measures. | Distinguishes cardiovascular endurance, strength, and flexibility, and explains what each component measures. |
| Heart rate & recovery | Cannot take a pulse or explain what heart rate indicates. | Measures heart rate but does not understand what recovery shows. | Measures heart rate accurately and explains how the speed of recovery reflects cardiovascular fitness. |
| How the body adapts to training | Believes the body stays the same no matter the activity. | Knows the body adapts but cannot describe how or why. | Explains how the body adapts to regular activity — a stronger heart, better endurance — and why change takes consistent time. |
| Measuring & interpreting fitness data | Treats a fitness measurement as a verdict about body size or looks. | Records data but slips into judging appearance rather than function. | Interprets fitness data as evidence about function — what the body can do — never about physique or appearance. |
| Anchor lab (fitness measurement — heart rate & recovery) | Skips the measurement lab or records numbers without a method. | Runs the lab but cannot say what the recovery data means. | Completes the fitness-measurement lab, records heart-rate and recovery data carefully, and interprets it as neutral evidence about function. |
| Integration (cross-domain) | Treats the science as isolated facts; makes no cross-domain connection. | Names a link to history, reading, or writing but cannot defend why it matters. | Connects the unit across History · Reading · Writing — including the James Lind scurvy trial as the root of evidence-based health — and defends why the connection matters. |
“My heart rate jumped during the step test, then dropped fast in the first minute afterward — that quick recovery is a sign of cardiovascular fitness. The number tells me about what my heart can do, not about how my body looks.”
“My heart beat faster, so I got tired. Fitness is just about how you look. I’m not sure what recovery means.”
You demonstrate this unit by running a fitness-measurement lab — taking heart rate and tracking recovery — and interpreting your own data aloud as evidence about function, not appearance — not a multiple-choice test. A criterion counts as mastered only when you can take the measurements carefully and explain the exercise science behind them. Mastery is demonstrated, not awarded.
A 5-page clipboard packet — unit overview, key terms, the mastery rubric, anchor examples, and a score sheet you can print and grade against.