04281663 is referenced by 102 patents and cites 7 patents.

A device for indicating the reaction of pulse rate to exercise. In preferred forms, the device measures the pulse rate at rest (R.sub.1), the elevated pulse rate (R.sub.2) resulting from the performance of a specified amount of work, and the recovery pulse rate (R.sub.3) at a specific time after ceasing exertion. The device includes calculating means for directly calculating a fitness index from the three pulse rates according to a chosen one of various formulae. The device also provides a visual or audible pulse output as a timing signal for performing the specified exercise.

Title
Physical fitness indicator
Application Number
6/40908
Publication Number
4281663
Application Date
May 21, 1979
Publication Date
August 4, 1981
Inventor
Robert D Pringle
28a Murrayfield Road, Edinburgh EH12 6ER, Scotland
GB
Agent
Joseph J Baker
Gerald J Ferguson Jr
IPC
A61B 5/02
View Original Source