有氧运动
Aerobic exercise sessions are limited to 20 minutes duration. They compensate for this by following the same "wave" pattern of steadily increasing intensity just like the weight training sessions. During the first 2 minutes, intensity should be at 5. Minutes 3, 4, 5, and 6 should be at intensity levels 6, 7, 8, and 9 respectively. Minute 7 goes back down to 6 intensity level and continues the wave pattern until the 19th minute where you push intensity level to 10. The last minute is a cool down to 5 intensity. You should be completely exhausted at this point so stretch afterwards.