Prediction of Perceived Exertion Ratings in National Level Soccer Players Using Wearable Sensor Data and Machine Learning Techniques

Table 3. Experimental setup analysis of our dataset with Pearson's and Spearman correlation between our
features and RPE. Only the top 10 with the highest absolute correlation are listed.

Feature	Pearson Correlation to RPE	Spearman Correlation to RPE
Heart rate, zone 8, abs. count	0.161	0.122
Heart rate, zone 7, abs. count	0.141	0.127
Heart rate, zone 8, relative share	0.135	0.112
Speed zone (10-13km/h), abs. count	0.132	0.107
Speed zone (10-13km/h), abs. distance	0.127	0.103
TRIMP (heart rate zone >4)	0.119	0.116
TRIMP (all heart rate zones)	0.116	0.109
Speed zone (0-9), abs. count	0.115	0.102
HIR (>14.4km/h), abs. count	0.109	0.099
Speed zone (14-19km/h), abs. count	0.108	0.101