Manual labor sucks

The last few days I have been moving big items around at work. This morning I woke up to sore hamstrings and lower back. It did not affect my swim at all. I managed 3.6k in the pool. I felt great on the first round of fast 25s. The second was a little more difficult. The last six my strokes shortened due to muscle failure. After some more manual labor I took a short nap. I headed out for an easy 35 minute run with several accelerations in low to mid 80s. No glute issues what so ever. It is kind of weird that I felt this way last Friday as well. I am hoping to be 100% very soon.