Figure 1. Heart Rate Data for National Group YO-YO IE2 Test

From

A Retrospective Study of the Yo-Yo IE2 Test: Can It be Used to Differentiate Between Different Levels of Futsal Referees?

D. Dixon

American Journal of Sports Science and Medicine. 2014, 2(3), 93-97 doi:10.12691/ajssm-2-3-5