Half of the participants went on to purchase their own fitness tracker devices and most of the group said that using the FitBit had encouraged them to exercise more.
Aeth hanner y cyfranogwyr ymlaen i brynu eu dyfeisiau olrhain ffitrwydd eu hunain a dywedodd y mwyafrif fod defnyddio’r FitBit wedi eu hannog i wneud mwy o ymarfer corff.