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Oh boy, my back is tight. The reason, you ask?? Well, I have to admit that I got a bit carried away when I was doing my regular exercise on the treadmill two days ago. Usually I start with 400m walk as a warm-up and do some jogging for about 200 to 400m and then I walk for around the same distance. I continue this cycle over and over again until when I get sick of it or when I have hit 4.5km to 5km mark in total distance. But two days ago, I was feeling good and very motivated so I jogged for about 800m straight during one cycle! And now I have got a bit of relapse of my backache^^; I should take it easy for a while, shouldn't I?? I have got a lot that I'd love to do but I shouldn't risk it by pushing myself too much!