Which of the following is a well-constructed SMART goal for physical activity?

• A. Walk 15 minutes, 2 days/week for 4 weeks
• B. Exercise 60 minutes, 7 days/week for 8 weeks
• C. Walk 30 minutes, 5 days/week for 8 weeks
• D. Walk more

Answer: (C)

A well-constructed SMART goal for physical activity is Specific, Measurable, Achievable, Relevant, and Time-bound. The goal that states walking 30 minutes, five days a week for eight weeks hits all these parts. It specifies exactly what to do (walk for 30 minutes) and how often (five days per week), which makes progress easy to track. It sets a clear timeframe (eight weeks), so you know when to reassess. The plan is realistically attainable for many people and aligns with public guidance that totals about 150 minutes of moderate activity per week, making it relevant to health goals.

The other options fall short in at least one SMART element. One describes a short weekly amount that doesn’t reach the usual recommended total minutes, making it less effective as a sustained goal. Another asks for a full hour every day, which can be too demanding for beginners and harder to maintain. The last option is vague—“Walk more” lacks specificity, a clear measurement, and a deadline. Together, these gaps show why the chosen plan is the best fit for a SMART goal.