If you want too increase your sitting time I suggest increasing five minute's each time. If your sitting for 15 minutes now try sitting for 20. When your comfortable sitting for 20 after a few days increase to 25. Keep increasing until you can sit for atleast 45-60 minutes straight. This may take some time and experimentation on your part but theres no need to rush it. Sitting regularly everyday is more important than the length your sitting for. Try to establish a firm minimum sitting time.
From Ajahn Chah:
Sitting for hours on end is not necessary. Some people think that the longer you can sit, the wiser you must be. I have seen chickens sit on their nests for days on end! Wisdom comes from being mindful in all postures. Your practice should begin as you awaken in the morning. It should continue until you fail asleep. Don't be concerned about how long you can sit. What is important is only that you keep watchful whether you are working or sitting.or going to the bathroom.
Last edited by bodom
on Tue Jan 12, 2010 3:44 am, edited 2 times in total.
“What should be done for his disciples out of compassion by a teacher who seeks their welfare and has compassion for them, that I have done for you, bhikkhus. There are these roots of trees, these empty huts. Meditate, bhikkhus, do not delay or else you will regret it later. This is our instruction to you.” - MN 19