All those squats, kicks, and triangles can leave the hamstrings haggard and the back bruised. How to cope? Make a plan. Here’s mine, and you’re welcome to steal it wholesale, although I really do recommend amending it to fit your own needs:
Repeat the following stretches twice a day, holding each one for 30 seconds: Child’s pose, up dog, standing forward bend. I’m currently on month number two, and my back already feels better. Let me know how it goes for you.