A one-line note that you ‘worked out’ does not show what to adjust next week. Record the activity, duration, breathing effort, and whether you could talk; together these details make changes easier to compare. The American Heart Association gives adults a general recommendation of 150 minutes of moderate aerobic activity or 75 minutes of vigorous activity per week, or a combination. This is not an individual clinical prescription. See its adult recommendations and intensity examples.

Keep intensity cues in context

At moderate intensity, breathing and heart rate rise, but conversation is still possible. At vigorous intensity, speaking more than a few words becomes difficult. The talk test is a rough way to estimate perceived effort. Do not treat a wearable’s heart-rate number, sweat, or pace alone as a definitive intensity measurement. Hills, heat, medicines, fitness, and health conditions can make the same pace feel different.

A fictional weekly total

Suppose a sample log shows 30 minutes of brisk walking on Monday, Wednesday, Friday, and Saturday: 120 moderate-intensity minutes. Add a 30-minute bike ride on Tuesday, assuming it also meets the talk-test description of moderate intensity, and the moderate-activity total is 150 minutes. Keeping the talk-test result beside each session lets you review both time and perceived effort. Missing a weekly target is not a reason to make a sudden large jump in duration or intensity the next week. The AHA’s activity-planning guide recommends tracking progress, warming up and cooling down, and increasing activity gradually.

A reusable log

  • Date and activity (walking, cycling, swimming, and so on)
  • Start and finish time, or actual exercise duration
  • Talk-test result (comfortable conversation / short sentences / difficult to speak)
  • If recorded, heart rate, when it was measured, and the device used
  • Symptoms before or after activity and unusual conditions such as heat or hills

For example: ‘Wednesday, indoor cycling, 25 minutes, could talk but not sing, no dizziness.’ This does not precisely determine a heart-rate zone or prove a training effect. Several weeks of notes can help you discuss which circumstances feel demanding with a healthcare professional.

Limits and when to stop

If you recently had a heart attack, stroke, cardiac procedure or surgery, or live with cardiovascular or another chronic condition, ask your care team to set your activity plan instead of choosing intensity from a general chart. Stop and contact a healthcare professional for chest pressure, unusual shortness of breath, dizziness, confusion, or a fast or irregular heartbeat during or after exercise. Persistent chest pain or other severe symptoms need emergency medical help. A log is not a diagnosis or safety clearance.

References