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Recently, there are more and more people keen on keeping fit including dumbbell sports. However people always estimate their sport amount by counting. Obviously, this would not be convenient for users who need to be concentrate on doing sports.
The E-life discoloring dumbbell can estimate how many calories they were burning by changing the color.
Zhejiang Sci-tech University
Hangzhou, Zhejiang Province, China
School of Art and Design,
Xiaoyan Li, Ruyi Zhang, Jiaren Tong, Lingsha Gu