This is a fascinating brief video of Master Duan Zhi Liang in Bejing. He is 90 years old and builds up his Qi by spending an hour each day doing WuJi Qigong exercises followed by martial arts sparring. He is also a healer, using acupuncture, Qigong, moxibustion, & tuina massage to heal others. He uses his own wei qi to restore balance in his patients to promote qi flow and balance in others.
Different chakra energies provide different types of experiences. You can train yourself to cultivate and use these subtle energies for more diverse purposes.
QiCultivation.com - Information on using the tools and methods to better sense subtle, spiritual energies, as well as receive and interpret the messages, and use/direct those energies.
AnotherQ.com - Personal experiences with subtle, spiritual energy.
QigongByQuist.com - Using Qi and subtle energies to help you maintain your health and wellness.
QibyQ - Directing subtle energies to help the earth and humanity