I am really tired all the time lately. I am in good shape, eat well balanced nutrition, get at least 8 hours a night of sleep, and am active throughout the day. I am trying hard to play tennis well, but it is frustrating that I can't find it in me to run down balls, jump, and move my feet like I could a week ago. I wonder if something could be wrong with me mentally, like my attitude. Its just frustrating that I have no energy and I try really hard not to be lazy. I really appreciate your help.
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