Quick geek lesson: 鈥減ersistence of vision鈥 is the optical illusion in which rapidly flashing static images blend together to look like they鈥檙e in motion. It鈥檚 how films work, and it鈥檚 the trick behind 听($80), which uses 23 LEDs embedded in the cord to display your jump count in real time in front of you.
鈥淎t our office, we took every 颅ex颅cuse not to work out鈥攚e were too busy, it was raining outside,鈥 says Tangram cofounder Joen Choe. He and his business partner, Deokhee Jeong, wanted an effective fitness routine they could do on the office patio in five 颅minutes. 鈥淏ut if your reps are getting into the hundreds, who wants to count them like a hamster in a wheel?鈥 Choe says.
He promises that the rope鈥檚 movement tracker, located in the polycarbonate handles, will never short you on double unders, and thanks to a recent firmware update, the rope now displays calories burned. You can also view your stats on the company鈥檚 (Android and iOS), which hosts Strava-like competitions, leader-boards, and awards.
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