Lately I have been feeling tired. Like all day tired. I can still run and everything but I still have that feeling. Also there is severe pain in my upper back on the left side.
I took a week off from all kinds of training and the back pain went away. But the tiredness remained. Have any of you ever experienced this?
I took a week off from all kinds of training and the back pain went away. But the tiredness remained. Have any of you ever experienced this?
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