According to the latest recommendations, for substantial health benefits, adults should:

Question

BlackTom AI · Accepted Answer

Adults should do at least 150 minutes of moderate-intensity aerobic exercise per week.

1. Relevant knowledge points and concepts
Major public-health bodies (World Health Organization, U.S. CDC, American Heart Association) define "substantial health benefits" as achieved by adults who accumulate at least 150 minutes per week of moderate-intensity aerobic activity, or 75 minutes per week of vigorous-intensity activity, or an equivalent combination. Muscle-strengthening activities are recommended on 2 or more days weekly in addition to aerobic activity.

2. Step-by-step reasoning process
- The guideline gives a weekly target (150 minutes moderate or 75 minutes vigorous).
- Moderate and vigorous intensities are not identical; vigorous activity counts roughly double toward the target (1 minute vigorous ≈ 2 minutes moderate).
- The 150-minute target can be accumulated across multiple days (e.g., 30 minutes × 5 days = 150 minutes).

3. Calculations and intermediate steps
- Example: 30 minutes/day × 5 days = 150 minutes/week (meets target).
- Equivalence: 75 minutes vigorous × 2 = 150 minutes moderate-equivalent.
- Evaluate the incorrect option about short daily sessions: 10–15 minutes/day × 7 days = 70–105 minutes/week, which is below 150.

4. Why the correct answer is correct
150 minutes/week of moderate-intensity aerobic exercise is the minimum duration specified by major guidelines to confer substantial reductions in risk for cardiovascular disease, diabetes, some cancers, and premature mortality. This threshold reflects evidence linking dose of moderate activity to meaningful health gains.

5. Why the other options are incorrect
- "150 minutes of vigorous-intensity exercise per day": Far exceeds recommendations (150 min/day → 1,050 min/week); guidelines recommend 75 min/week of vigorous, not per day.
- "Exercise at a moderate level for 10 to 15 minutes every day": Totals only 70–105 min/week, below the 150-min threshold.
- "Perform some type of resistance training every day": Resistance training is recommended, but not required daily; guidelines advise strength training at least 2 days/week in addition to aerobic activity.

6. Conclusion
The correct recommendation is to do at least 150 minutes of moderate-intensity aerobic exercise per week, which matches the provided answer.

According to the latest recommendations, for substantial health benefits, adults should:单项选择题

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