Gym Spcialist and Expert

All the people work out in gym. They make a big mistake and make themselves a lot of damage for their physical body's system. Why? i see them suppress breath every time. In this way, where the "qi" goes to, when the person use outside force to strengthen the final blow? The "qi" goes into their system. what would happen? young man do not know until old. All the pain will burst out from every where. Even those Specialist and Expert do not know it. Why i know this? Because i had practiced "qi-gong" in high school. Later, this "qi" from the system protect the body instantly and automatically. Do you know "qi"? if you do not know it you do not know spiritual practice yet. Regarding kundaliini yoga teacher, they do not know "qi" in the first place. i met a lady in jagrtii. She got sick after first time in the class. Why? after 30 minutes pranayama practice?! Even a healthy young man can not take it, not to say people over 50, the worse, many of them are not vegetarian. This pranayama practice, i rather call it Bandha or Vedha practices for accurately naming. Asana has 4 branches--Asana, Mudra, Bandha and Vedha. People pay so much fee to get a certificate and find out they are not to be a valued instructor yet. Because they do not know how to do with "qi" properly. One more thing mentioned here. Our organization also give out yoga instructor certificate. Does our teacher know how to do pranayama or "qi" in a proper way? i doubt it.