Grade 9 · lesson 3 of 4

Use adult moderate-equivalent minutes

Use adult moderate-equivalent minutes

About 18 minutes, plus any extended practice

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Supplied materials

  • Paper or a text document; all cases below are original fictional learning inputs.
  • An adult may read aloud; drawing or spoken answers are valid. No personal health information or physical performance is required.
  • The separate worked case gives moderateMinutes=110, vigorousMinutes=20. For this adult planning equivalence, calculate moderate+2×vigorous minutes. First identify the quantities and keep their units consistent. The calculation is 110+2*20=150 moderate-equivalent minutes/week. Round to six decimal places where needed. That result answers this supplied planning question only. It does not establish what a real person did, diagnose a condition or prove physical skill. Compare the units with the question before accepting a number.
  • Fictional case 1: moderateMinutes=90, vigorousMinutes=30. What is the modeled result using the stated method?
  • Fictional case 2: moderateMinutes=100, vigorousMinutes=20. What is the modeled result using the stated method?
  • Fictional case 3: moderateMinutes=60, vigorousMinutes=45. What is the modeled result using the stated method?
  • Fictional case 4: moderateMinutes=80, vigorousMinutes=35. What is the modeled result using the stated method?
  • Fictional case 5: moderateMinutes=120, vigorousMinutes=15. What is the modeled result using the stated method?
  • Fictional case 6: moderateMinutes=50, vigorousMinutes=40. What is the modeled result using the stated method?

Learn the idea

Adult aerobic guidance permits an equivalent combination of moderate and vigorous activity. A rule of thumb counts one vigorous minute as approximately two moderate minutes. This is a planning equivalence, not an instruction to intensify activity or a physiological measurement.

Add moderate minutes plus twice vigorous minutes. The supplied blocks do not overlap. Keep clock time separate: equivalent minutes can exceed actual elapsed activity minutes. Muscle-strengthening days are a separate component of the guidance.

All participants are fictional adults aged nineteen or older. No exertion test is required. The calculation does not apply an adult weekly target to a minor, diagnose fitness or guarantee benefit. Individual adaptation and qualified support remain relevant.

  1. Mark the facts or constraints in the supplied case.
  2. Apply the method explained above; draw a sequence, table or decision map.
  3. Compare your result with the worked solution and explain the difference.
  4. Complete the new cases, then check the changed-case extension.
Worked example

See the method in action

The separate worked case gives moderateMinutes=110, vigorousMinutes=20. For this adult planning equivalence, calculate moderate+2×vigorous minutes. First identify the quantities and keep their units consistent. The calculation is 110+2*20=150 moderate-equivalent minutes/week. Round to six decimal places where needed. That result answers this supplied planning question only. It does not establish what a real person did, diagnose a condition or prove physical skill. Compare the units with the question before accepting a number.

Your turn

Check your reasoning

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Helpful tips
  • Equivalent minutes are a planning conversion, not extra elapsed time.
  • This combination model is explicitly for adults; muscle days remain separate.
Use adult moderate-equivalent minutes: Fictional case 1: moderateMinutes=90, vigorousMinutes=30. What is the modeled result using the stated method?

Feedback appears here after you check. This is practice, not a graded school assessment.

See the answer and explanation

150 moderate-equivalent minutes/week

For this adult planning equivalence, calculate moderate+2×vigorous minutes. With moderateMinutes=90, vigorousMinutes=30, calculate 90+2*30=150 moderate-equivalent minutes/week. Results are rounded to six decimal places where needed. This is a supplied model, not a personal health assessment.

Take it further

Changed case: moderateMinutes=70, vigorousMinutes=40. Show the operation. Expected: 70+2*40=150 moderate-equivalent minutes/week; round to six decimal places where needed, retain model limits and explain the units.

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More practice: try new cases

Choose an answer for each problem. Explain your method on paper, then use the feedback to decide what to revisit.

More practice: try new cases
1. Use adult moderate-equivalent minutes: Fictional case 2: moderateMinutes=100, vigorousMinutes=20. What is the modeled result using the stated method?
Need a hint?
  • Equivalent minutes are a planning conversion, not extra elapsed time.
  • This combination model is explicitly for adults; muscle days remain separate.
2. Use adult moderate-equivalent minutes: Fictional case 3: moderateMinutes=60, vigorousMinutes=45. What is the modeled result using the stated method?
Need a hint?
  • Equivalent minutes are a planning conversion, not extra elapsed time.
  • This combination model is explicitly for adults; muscle days remain separate.
3. Use adult moderate-equivalent minutes: Fictional case 4: moderateMinutes=80, vigorousMinutes=35. What is the modeled result using the stated method?
Need a hint?
  • Equivalent minutes are a planning conversion, not extra elapsed time.
  • This combination model is explicitly for adults; muscle days remain separate.

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