
Aerobic refers to any exercise that helps you use oxygen more efficiently by reaching and maintaining your Target Heart Range (THR) — the safest range for heart beats per minute during exercise. Aerobics should be done for a minimum of 20 — 30 minutes, 3 times a week. Calculate your THR by subtracting your age from 220 and multiplying your answer by 60% and by 80%. The lower number suggests a safe rate for beginners, while the higher number would be your goal as your fitness level improves.
