Lethargy: Short Versus Long Sessions I have roused myself to meditate, but I am experiencing lethargy and drowsiness throughout the whole session, drowsiness which doesn't cause me to sleep but which I perceive helplessly. My question is should I:

a) continue to merely watch my hazy thought process as long as I am not sleeping

b) reduce the length of my sessions so that the time spent in meditation is devoid of drowsiness.

I've done a session of 30 min, and am wondering whether to reduce it to 15 or 20 min. 

Thank you.
For a 30 minute session, my recommendation is to continue to merely watch the hazy thought process (as long as there is not sleeping). Hopefully, after a while, the haziness will clear, like dawn fog clears eventually as the sun rises.