更新1:
I am so sorry that I've made you guys confuse about the question.Actually, I am quite satisfy with my weight and I do not need to keep fit at all, what I wanna know is where can I check the 體內脂肪含量 in HK.
更新2:
as I heard that normal people has 15%-20%, athlete has 7%.i just wonder what do I get..Anyways, i do appreciate for all of you guys giving so much advices.Thanks!