Question: how many calories should you eat when training for a marathon?
Answer: Long-distance runners should consume 19 to 21 calories per pound of bodyweight for 1 – 1.5 hours of running or strenuous activity per day. If your training schedule calls for 1.5 – 2 hours of running or strenuous activity per day, 22 to 24 calories per pound of bodyweight need to be consumed.