Hi,
I have been practicing over 2 years, and this still happens to me from time to time. I will come home from an evening class and all of a sudden my body is just done–like hitting a wall. I will sleep so deeply I barely even move. I imagine that it is because the class uses all the glycogen from every possible muscle cell in my body since it is such a thorough workout, and I just need the sleep to recover. Sometimes it is nice to have sleep that deep–although it isn’t great if it happens too early in the evening!
I have never found a way to avoid/prevent it from happening. I always hydrate well, use sea salt/electrolytes, and my diet doesn’t change alot, so I am not sure why it happens after some classes and not others. It will be interesting to see if your next class causes the same reaction for you. I do remember the first few weeks being particularly fatiguing–it may take some getting used to, but for me it was well worth the effort.
