To determine if Arnold's weekly workout plans meet the 2018 Physical Activity Guidelines for Americans, we first need to review those guidelines. The recommendations suggest the following for adults:
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Aerobic Activity: At least 150 minutes of moderate-intensity aerobic activity per week or 75 minutes of vigorous-intensity activity, or a combination of both spread throughout the week.
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Muscle-Strengthening Activity: In addition to aerobic activity, adults should engage in muscle-strengthening activities on 2 or more days a week.
Based on these recommendations, if you can provide details of Arnold's workout plans—such as the types and amounts of exercises he does each week—I can help assess whether they meet the minimum requirements.