Twister, Tied my quads up in knots

Two factors that will always affect a run: not getting enough sleep and playing Twister with S (age 8) and L (age 6). Holding my legs across the mat and reaching with my hands was hard, I really felt it in my quads and hammies.
Anyway- the sun melted most of the snow and ice on the trail. But my tired legs kept me from having a faster time.  It was very weird- my left knee buckled twice before I had finished a mile.  Then my right knee was tired around mile 4, and my left knee/shin/calf were tight for most of the run. 

I need some sunglasses!  The winter sun was low and in my face for half the run.