Boxing Day Letdown

Today I just didn't feel right, and by the time I stopped my knees weren't feeling great. Not that they were in a lot of pain, but they just felt weak, like if I kept going I could hurt myself. I was going to go 8 miles but stopped at 5. I think it was the consequences of running two days in a row at this point in the plan. I can't run again tomorrow, but maybe I will on Sunday if I'm up to it and the weather is nice. Doubtful.