The Wii Vitality Sensor has been put on hold as it doesn’t work on a high enough proportion of people and its applications are limited, says Nintendo.

Speaking with investors, Nintendo president and CEO Satoru Iwata said that the peripheral – designed to quantify how tense or relaxed a person is via their pulse – did not always behave in the intended manner.

“We wondered if we should commercialize a product which works as expected for 90 people out of 100, but not so for the other 10 people,” said Iwata.

“We have not been able to launch it as a commercial product because we could not get it to work as we expected and it was of narrower application than we had originally thought.”

However, if technological advancements enabled it to be used by 999 of 1,000 people, the company might reconsider its position, Iwata said.

“I actually think that it must be 1,000 of 1,000 people, but (since we use the living body signal with individual differences) it is a little bit of a stretch to make it applicable to every single person.

“In any case, its launch has been pending because we decided that the Wii Vitality Sensor’s current result is insufficient as a commercial product.”

The Wii Vitality Sensor was unveiled at E3 in 2009, but has rarely been mentioned since.