Yoga ....creak and groan

this morning was Yoga X!! oh my!! My body is sore from the exercise this week and I could barely do plank. I struggled through about 45 minutes, though I did the basic poses, not all the moving through to get the poses....but I did something... I just keep thinking about Tony's statement - how do you feel when you work out and how do you feel when you don't work out...I'm stronger every day!!