"increases in endocannabinoids only when they were coached"

New York Times email
Well
August 22, 2019
quote:
Many people can attest to the fact that exercise helps them feel emotionally balanced.
This week Gretchen Reynolds writes about new research exploring that connection. Researchers used blood samples from women with depression who rode exercise bikes, sometimes coached and sometimes at their own pace.
They found something surprising:
Both kinds of exercise made them feel a bit better, but their blood showed increases in endocannabinoids only when they were coached.