A Fuzzy Logic-Based Personalized Method to Classify Perceived Exertion in Workplaces Using a Wearable Heart Rate Sensor

Table 1

Borg’s scale.

Scale	Description
6	No exertion
7	—
8	—
9	—
10	—
11	Light
12	—
13	Somewhat hard
14	—
15	Hard (heavy)
16	—
17	Very hard
18	—
19	—
20	Maximal exertion