Situation: The public health nurse visits adults with noncommunicable diseases (NCDs) in their homes and runs lifestyle counseling sessions at the Barangay Health Station (BHS). A 45-year-old office clerk with hypertension agrees to walk briskly for 30 minutes per session. On how many days a week must he walk to reach the minimum amount of moderate physical activity recommended for adults?

Adults need at least 150 minutes of moderate physical activity a week, spread across the week. At 30 minutes per session, 150 ÷ 30 = 5 sessions, so he must walk on at least 5 days.

Core concept: minimum moderate-intensity aerobic activity for adults

The recommendation for adults is to accumulate at least 150 minutes of moderate-intensity aerobic physical activity per week. This can be broken into sessions of at least 10 minutes each, spread across the week. For this 45-year-old office clerk with hypertension, brisk walking qualifies as a moderate-intensity activity because it raises the heart rate and produces noticeable sweating while still allowing conversation.

The arithmetic is straightforward: 150 minutes ÷ 30 minutes per session = 5 sessions per week. Therefore, walking briskly for 30 minutes on 5 days each week meets the minimum recommendation. The key is not the number of days alone, but the total weekly volume of moderate activity. A person could also meet the goal by walking 50 minutes on 3 days, but the question fixes each session at 30 minutes, so 5 days becomes the minimum.

Watch out! Do not confuse the 150-minute minimum for moderate activity with the alternative of 75 minutes of vigorous-intensity activity per week, or with the additional benefits seen when adults increase activity to 300 minutes per week. The question specifically asks about moderate activity.

The WHO 2020 guidelines on physical activity and sedentary behaviour reinforce that adults with chronic conditions such as hypertension should still aim for the same 150–300 minutes of moderate activity per week, unless contraindicated ^[2]. In fact, regular aerobic exercise is a core lifestyle intervention for blood pressure control. Older consensus guidance on mild essential hypertension also supported regular aerobic exercise as part of nonpharmacologic management, noting that it can lower both systolic and diastolic blood pressure over time ^[1]. For a 45-year-old with hypertension, this is not merely a general wellness suggestion; it is a therapeutic lifestyle prescription.

Key point! For a fixed 30-minute session, the minimum number of days needed to reach 150 minutes is 5. If the session length were 50 minutes, then 3 days would suffice; if it were 75 minutes, then 2 days would technically reach the total, though spreading activity across more days is generally preferred for habit formation and blood pressure stability.

From a nursing process perspective, the public health nurse should document the agreed frequency and duration, assess for any hypertensive urgency symptoms before exercise, and advise the client to start gradually if previously sedentary. The goal is not perfection on day one but consistent accumulation of moderate activity. The ICFSR expert consensus similarly emphasizes that structured exercise should be individualized and progressive, especially when chronic disease is present . The ACSM consensus further notes that physical activity is a key component of managing excess body weight and cardiometabolic risk, which often coexist with hypertension .

Thus, the correct answer is 5 days per week.