The Wii Vitality Sensor was meant to measure a player's heart rate and promote relaxation.
Nintendo unveiled the Wii Vitality Sensor in 2009 at E3 but never released it.
The cancellation of the Wii Vitality Sensor was attributed to testing issues.
Ubisoft's similar product announcement at the same time may have influenced Nintendo's decision not to release the Wii Vitality Sensor.
The cancellation of the Wii Vitality Sensor was a disappointment to many Nintendo fans.