It has been my experience that the phrase “you’re eliminating toxins” has become slightly trite due to overuse. It is not “wrong” or “incorrect”, though to have that be the same answer to a student in their first month as it is in their twelfth is a bit concerning.
The human body is eliminating toxins by its very design. If you are moving, urinating, defecating, perspiring, and breathing then of course you’re releasing toxins. Unfortunately in our rush to become yoga teachers we far too often forget to BECOME yoga teachers. Then we are left to merely regurgitate what we have heard or been told.
There are two types of exhaustion. There is the exhaustion from climbing a mountain, working a 16-hour shift, cycling 50 miles, chasing around after one’s children for the weekend. Then there is the exhaustion of where you can’t get going in the absence of the fatigue of labor. The recourse for the first is obviously rest and nourishment. The recourse for the second is the attention to the kidneys and their movement into the body and up toward the heart center.
Students should not, typically, be fatigued by backbends, au contraire. They should be energized by said practice, brought from the past into the present, and able to release long-held fear which impede doing. Without seeing you in backbends I obviously can’t give you direction for backbends. That responsibility must rest with those whom you’ve chosen to teach you, be they three or only one.
It may very well be a movement toward a higher level of well being and certainly not something to be “concerned” about. But the curiosity is completely appropriate and a person with a history of fatigue can reap the benefits of appropriate asana so that such a state does not remain part of their homeostasis.
warmly,
gordon