Clarify Staying Within the Anaerobic Threshold

“The formula you used [Heart Rate at AT = 0.6 (230-age in years) ] provides the ESTIMATED heart rate at anaerobic threshold…he ACTUAL threshold can only be determined by Cardiopulmonary Exercise Testing, which is expensive and not readily available. My advice to you is to keep up the walking and avoid prolonged periods of HR greater than 100. Another rule of thumb is to ask two questions after activity: (1) How do I feel afterward? (2) How do I feel the next day? Activity should not trigger post-exertional malaise. If activity triggers a flare, then reduce that activity by 50%.”

–Dr. Charles Lapp