I have a question to anyone that knows or teaches taekwondo. My son goes to taekwondo 3 days a week and he is 7 years old blue belt. The instructor gets the kids to do high end physical training such as tabatas and resistence training. The kids range from 6-10 and i have noticed that after every class by about 3 hours my son can barely move. He gets to be so sore that I have taken him to the chiropractor to try and releieve some pain. Now i dont want to go and say anything to the instructor unless i know if this is normal for taekwondo instructors to be doing this type of fitness training or not. Please help!!