Just had my stress test yesterday. I didn't realize that I should push my heart rate to 147 in my exercise. I asked my doctor whether or not I should push my heart rate to 147 daily. She said I should. After that daily test, if I don't feel chest pain, I'll be OK. If I do, I should let her know. Apparently my daily MA training don't push me to that level. I may have to add "fast spring" into my daily training in order to achieve that. This make me think that most Taiji guys may never achieve 147 heart rate in their daily training. How will you be able to know if you don't have any heart problem if you don't make your heart to beat in that kind of fast speed 147? Normal resting heart rate ranges from 60 to 100 beats a minute. What's your opinion on this?