A 50-year-old jogs vigorously for 30 minutes three times per week. Using MHR = 220 − age, calculate the individual's MHR and the numeric vigorous-intensity heart rate range. Then state whether 90 minutes of vigorous activity per week meets the Physical Activity Guidelines (PAG) for vigorous activity.

• A. MHR = 180 bpm; Vigorous ≈ 126–153 bpm; Yes, 90 minutes meets the PAG because any amount above 60 minutes is generally considered sufficient.
• B. MHR = 170 bpm; Vigorous ≈ 102–138 bpm; No, 90 minutes is below the vigorous guideline because the lower bound used was 60% rather than 70%.
• C. MHR = 170 bpm; Vigorous ≈ 119–145 bpm; Yes, 90 minutes/week meets the PAG vigorous minimum.
• D. MHR = 170 bpm; Vigorous ≈ 119–145 bpm; No, because one must also demonstrate two muscle-strengthening sessions to meet the full PAG recommendations for a complete weekly program.

Answer: (C)