MeSci
ME/CFS since 1995; activity level 6?
- Messages
- 8,231
- Location
- Cornwall, UK
The PEM we are experiencing, seems to be heart related, and specifically a mitochondrial issue, specific to the heart in this instance (and Brain fog, the same, of the brain).
My understanding is that the heart rate is just an indicator of the abnormality that exertion causes, and that the mitochondria where the anaerobic ATP production causes the problem are (mainly) in the body part being used, thus the muscles in the case of physical exertion and the neurons in the case of mental exertion.