Wahoo’s first heart-rate sensor was of the pedestrian ANT+ variety, and connected to the iPhone through a 30-pin ANT+ dongle. Around a year later, the Atlanta-based outfit introduced the first heart-rate sensor that connected to a smartphone through Bluetooth; specifically and only to the iPhone 4s, since that was the only phone at the time with Bluetooth 4.0 under the hood.

Wahoo upped the ante again in January at CES, when they revealed a radical departure from traditional heart-rate based fitness tracking: Their new highly sophisticated, three-model TICKR sensor squad, combined with an all-new app that turns conventional fitness-tracking on its head. Now the first of the TICKR trio, the TICKR Run, is hitting the street.

LAS VEGAS — Rather than come out with a more casual-oriented wearable fitness tracker like everyone (and we mean everyone) else, Wahoo stuck to its athletic roots and took the more serious route of improving the heart-rate monitor strap and accompanying training software the company introduced a few years ago.

In fact, Wahoo has created three new versions of its Bluetooth HR strap. The company even tried to restructure the way athletes think about training with the new “burn or burst” approach for the Wahoo iOS app.