Activities that use large muscle groups, can be maintained continuously, and are rhythmical and aerobic in nature are recommended. These activities include walking, running, bicycling, cross‑country skiing, dancing, rope skipping, rowing, stair climbing, swimming, skating, and other endurance games. Activities that require running and jumping generally cause more injuries than do low impact and non‑weight bearing types of activities.
The aerobic exercise session should have a 5‑10 minute warm‑up. The purpose of the warm‑up is to gradually increase the heart rate. The actual aerobic training session should last 20‑60 minutes, during which the heart rate should be elevated into the training zone. Following this should be a 5‑10 minute cool down which allows the body and heart rate to return to normal. The cool down also may prevent dizziness, fainting, or nausea.