It could be an exercise device with a built in motivation for continuing exercise.
From the newscientist.com
He was using an exercise device, doing deep knee bends, with elastic straps.
From the en.wikipedia.org
The existing exercise device on the space station has a mechanism that more closely resembles a rubber band.
From the cnn.com
It was invented by a Navy Seal, Randy Hetrick, as a portable exercise device that members of the military could use almost anywhere.
From the kansas.com
The new station cargo includes additional sleeping quarters, a second toilet, a water reclamation system and a resistance exercise device.
From the sciencedaily.com
So let's move on to the Bullworker, an isometric exercise device from the 1960s that shifted more than nine million units now gathering dust in more than nine million attics.
From the independent.co.uk
So, certainly if you have an event where during exercise the device goes off, I would stop exercise at that moment.
From the abcnews.go.com
Using the personal planner function on nearly any device is an exercise in futility.
From the techcrunch.com
Type in your exercise, and the device calculates calories burned.