Yesterday I was sitting in the hot tub. I was a very nice evening. The children were playing outside with my husband. It was very warm and I saw the hot tub and I thought I might go in now. The children were very surprised that I went in the hot tub. I thought they would join me but they did not. They kept on playing with my husband. In the hot tub I did some exercises. I thought that was a good idea. But I did not realize that I should wake up with some hurting knees. My knees are feeling a little bit better now after I walked a little bit but it is still strange.