Prompted by various answers over an fitness.stackexchange.com where I put into doubt the existence of Chi, I was prompted to provide references for this assertion.

Issues with the burden of proof aside, have there ever been systematic studies regarding Chi as an alleged energy flowing through our body?

Note: This question is not aimed at practices that explain their effectiveness by invoking Chi. Whether or not, for example, acupuncture works is unrelated to Chi existing or not existing. It might very well work for reasons completely unrelated to Chi.

Note 2: I believe this question is different from the question "Does Chi exist" posted on this site, because that post doesn't bother to define what is meant by Chi and also makes no assertions regarding the properties of Chi.

EDIT: Well, here's one example of someone making a claim that I think goes beyond the metaphysical:

Both your physical body and chi generate sensations you can feel. The sensation of chi is just as concrete as the physical body, only slightly more subtle, with a feeling that is lighter but nonetheless very real. Some compare it to bioelectricity. Some of the standard sensations of chi are heat, cold, pressure, wind, light, electricity, numbness, and mist. For example, in a platonic relationship, a touching of hands or a peck on the cheek is usually a fairly physical experience. In a sexual context however, a touch or kiss can send an energy wave within and throughout one or both of the participant's bodies. This wave is chi.

from Energy Arts