yep, cheap ones actually burns more calorie, maybe

來源: lilylan37 於 2015-08-12 22:06:57 [] [舊帖] [給我悄悄話] 閱讀數 : (183 bytes)

yep, cheap ones actually burns more calorie, maybe because less "free bounce" relaxation period?  I have knee problem so I have to go with the JumpSport 350i

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