tired, but got my hour in

After yesterday's run, I'm rather pooped!
But, I got up early to get my DDPYoga in before everyone got out of bed. Knowing that I had an hour ahead of me, I picked DC and RHC. 66 minutes of torture fun.
My left hamstring is TIGHT. It's been an on-going problem. I really need to foam roll it. (Hmmm.. I really need a foam roller.)
I'm still struggling to get my heart rate in the right zone. I've got to figure this out!