There is a one page article at the back of a yoga magazine that came out this month in which they really encourage anyone doing yoga to stay in savasana for at least 15 minutes. They insist that we just do not get the full benefits of all our hard work if we don’t give ourselves this time. I don’t remember the name of the magazine as I just scanned it briefly at an airport.
I’ve been following their advice and it’s done wonders for me. I’m 58 and was noticing a fair amount of tiredness after yoga (Bikram 5 days a week). For the last week or so, my 15 minutes savasanas have reinvigorated my practice. I have way more energy for the rest of the day and way less aches and pains.
I know not everyone feels that they have the time to do this, but if you can try it, see if it makes any difference in the way you feel, think, and act for the rest of the day.