Irisin, a hormone that is released during exercise, may improve brain health and lessen the damage that occurs during Alzheimer’s disease.
More in the New York Times of today(Swedish:) se också https://sv.wikipedia.org/wiki/Irisin
och
Irisin was first reported by Bruce Spiegelman et al in the journal Nature in January 2012. Spiegelman and his colleagues at Dana-Farber isolated the hormone irisin which is released from muscle cells after endurance exercise and had a hunch that it was somehow linked to triggering many of the health benefits of exercise.