Listen to the music-the best way to lose weight

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My friend is so fat, so heavy. last year, his bed was broken... Now he looks not so fat, just looks strong. He not bant, not have medicine. How do he lose weight? Listen to the rock music with dance, he said. He like rock-and-roll. He said with music, every cell is dancing, that's very effective. I think that reasonable, maybe you can choose the music to try. or if you have good experience, please share...