I'm studying the paths of eastern occultism, which direct control of the body using methods passed down from teacher to student. I am also a Reiki master, which has surprised quite a few people on what I have discerned.
I can manipulate my heart rate from 50 bpm to 130 bpm, just by concentrating on a specific pattern. I also can adjust my core body temperature up to about 105F and hold it. I can, with touch, feel injuries on peoples bodies, even if they have long since healed.
I know about my body.
I can tell if I am getting sick and attempt to prevent it. We know of placebo, and how strong its effects are. I just forcefully tell my body that I will not get sick. And I have not since I started practising.
Perhaps, it may be called the occult, but I believe we just do not have appropriate methods to measure it. It works for me, and I keep the workings to a very scientific mindset.
I'm sure I'll get mod-bombed for this, as people here seem very antagonistic to anything of spiritual or esoteric origin... But I remain hopeful.