Both Tai Chi (Taiji) and Qigong can help cultivate the Qi (life energy). Qi is a form of immeasurable vital energy; however it is challenging to prove that it works. Through arduous scientific studies, Dr. Shin Lin presented fascinating results at the 2016 World Congress on Qigong, Tai Chi, and Traditional Chinese Medicine and illustrated how the healing art enhances the blood flow and electromagnetic energy. More...
Bioelectromagnetic Medicine: Specific electromagnetic (EM) frequencies modulate cellular function to restore or maintain health. Ultrasmall magnetic intensities are biologically significant which suggests that EM signaling is endogenous to cell regulation, and consequently that the remarkable effectiveness of EM resonance treatments reflects a fundamental aspect of biological systems. Organisms contain mechanisms for generating biologically useful electric signals.
Chinese researchers measure electromagnetic fields and microdischarges from the human body. This is a new way to measure "external qi". To date, mainstream medical science researchers have not claimed to be able to measure qi, let alone external qi. What has been measured is bioenergy. Also see Bioenergetics.
First and foremost, qigong is exercise. The following book goes into great detail on the molecular and cellular benefits of exercise.
Molecular Aspects of Exercise Biology and Exercise Genomics, the latest volume in the Progress in Molecular Biology and Translational Science series includes a comprehensive summary of the evidence accumulated thus far on the molecular and cellular regulation of the various adaptations taking place in response to exercise. Changes in the cellular machinery are described for multiple tissues and organs in terms of signaling pathways, gene expression, and protein abundance. Adaptations to acute exercise as well as exposure to regular exercise are also discussed and considered. - Includes a comprehensive summary of the evidence accumulated thus far on the molecular and cellular regulation of the various adaptations taking place in response to exercise - Contains contributions from leading authorities - Informs and updates on all the latest developments in the field of exercise biology and exercise genomics.