Exxentric

The kBox4 and its applications for training with eccentric overload and instant kMeter feedback introduced to a coach at the Beijing Research Institute of Sport Science.

Exxentric was founded in Stockholm, Sweden in 2011 by a team including the two former ice hockey coaches Fredrik Correa, Swedish dermatologist, and Mårten Fredriksson, a manager at the Swedish Olympic Committee.[12]

Their first product launched the same year, the kBox, was based on their experience from a research project into flywheel training for space travel at Karolinska Institute funded by NASA and ESA.[13][14][12] Flywheel training has subsequently been shown to lead to improvements of strength and power, hypertrophy, muscle activation, muscle length, and tendon stiffness, which in turn can improve athletic performance in speed, jump height, change of direction and resilience to injury.[15][16]

2015, Exxentric first introduced its kMeter app for accurate monitoring of power and energy when using its flywheel training devices, later validated by a sports science research team.[9] In 2018, Exxentric launched a new product line based on its flywheel training solution named kPulley, with a wall-mounted design to train horizontal movements.[17] It was followed in 2020 by the LegExx machine for leg extension exercises, and in 2021 by the kPulley Go, its most portable training device thus far.

From 2017 to 2021, Exxentric grew by above 300%[5] and was awarded Superföretag by Bisnode in 2020[10] and DI Gasell by Dagens Industri in 2020 and 2021.[11]

The company counted professional football clubs Juventus, Inter, CSKA Moscow and Djurgården among its first customers,[14][4] and examples of notable individual users of Exxentric equipment include professional tennis player Andy Murray,[18] actress Brie Larson[19][20] and model Kate Upton.[21][22][23]

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• Official website