Today is Sunday but not sunny day. It has been drizzling all the day. Summer is drawing near, which means beach vacation is coming. I have to get back in shape, therefore, recently I go to gym frequently. As usual, I was lifting weights, a muscle guy walked to me and said, I should adjust my pose, and If I continue to work out like this, it will damage my lower back. Through communication, I know he is a professional trainer. Except for giving me a proper modification, he suggested that I should do cardio 45 minutes each day. I can get a overall fitness quickly if I combine workout with cardio four times a week. And doing cardio regularly like swimming, jogging and cycling can keep me in shape. Anyway, just write here. I have to stretch my body that is terrible sore.