I will tell you few things about depression, not from a professional perspective, as I am not a psychologist, but from a personal one; from my experience and from people close to me.
An inversion is a body position where the heart is higher than the head. It is mostly used in yoga and it has a lot of benefits. Some benefits bring us back to the childhood, some are purely physical.
When we embark on a fitness journey we gather information about training and diet/nutrition. We, or most of us, forget about the benefits of training for our mental health and how to maximize them.