At what MET level does an activity become classified as vigorous according to the MET Levels of Common Activities handout?

Question

BlackTom AI · Accepted Answer

One MET equals the energy cost of sitting quietly (about 3.5 mL O2·kg−1·min−1), and public health guidelines use MET thresholds to classify activity intensity: light activities are under 3.0 METs, moderate activities fall around 3.0 to 6.0 METs, and vigorous activities are above that moderate ceiling. 1) Relevant knowledge points and concepts - MET (metabolic equivalent) quantifies physical activity intensity relative to rest (1 MET). - Standard intensity cut-points: light <3.0 METs, moderate ≈3.0–6.0 METs, vigorous >6.0 METs. - These cut-points are used on MET handouts and in activity compendia to label activities (e.g., brisk walking ≈3.0–4.5 METs is moderate; jogging ≈7–10 METs is vigorous). 2) Step-by-step reasoning - Determine where the vigorous category begins: by definition it begins above the upper limit of moderate. - Moderate upper limit is 6.0 METs, so vigorous must be any activity exceeding 6.0 METs. 3) Intermediate steps / thresholds shown - Light: < 3.0 METs - Moderate: 3.0 to 6.0 METs - Vigorous: > 6.0 METs No arithmetic beyond comparing each answer option to these thresholds is needed. 4) Why the correct answer is correct - "Greater than 6.0 METs" matches the standard cut-point separating moderate from vigorous intensity. Any activity with an energy cost above 6.0 METs is classified as vigorous on the MET Levels of Common Activities handout. 5) Why the other options are incorrect - "Greater than 8.0 METs": too restrictive; many vigorous activities fall between 6.1 and 8.0 METs and would be misclassified as non-vigorous by this threshold. - "Greater than 3.0 METs": too low; this would include many moderate activities (3.1–6.0 METs) and thus would not correctly isolate vigorous intensity. - "Between 3.0 and 8.0 METs": this range mixes moderate and some vigorous and excludes activities above 8.0 METs, so it does not define vigorous intensity correctly. 6) Conclusion The correct classification threshold for vigorous activity is Greater than 6.0 METs, which matches the provided answer.

At what MET level does an activity become classified as vigorous according to the MET Levels of Common Activities handout?Single choice

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