Usually free weights aren’t the first thing you’d think of when design is mentioned. However, this is not the case for designer Sang-Hoon Lee. This digital barbell concept, dubbed the Revolution Dumbbell, really could be useful if put into production. You set the display to the appropriate weight and inside, balls start to spin. When they spin fast enough, the desired weight is achieved.

Without the need for a whole rack of weights to exercise, this setup could easily find its way into exclusive gyms like Equinox and celebrity personal trainers would most likely make it a staple of a workout. In the mean time, stick with the Bowflex you bought three years ago. One thing’s for sure, don’t count on John Brownlee buying them.

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