Investigating the relationship between the ratings of perceived exertion and tone-entropy of heart rate variability during a graded exercise

Mouad S. Azz, Ahsan H. Khandoker, Herbert F. Jelinek

Research output: Book chapter/Published conference paperConference paper

Abstract

This study explored the autonomic nervous system (ANS) adaptation in relation to exercise and how this correlates with the ratings of perceived exertion (Borg-RPE) over four ranges 6-8; 9-12; 13-16; 17-20, by using the time domain parameters and the multi-lag Tone-Entropy (T-E) of heart rate variability (HRV). ECG signals were collected from ten subjects who were recruited to participate in a graded exercise protocol on a treadmill. Results showed that SDNN and RMSSD decreased from lower to higher Borg-RPE, indicating a decrease in HRV. Entropy significantly decreased along the first 3 Borg-RPE ranges but increased in the recovery phase in which Tone values became negative (high HRV). As Borg-RPE values increased to the 17-20 range, Tone values decreased and Entropy increased compared to the 13-16 interval suggesting vagal predominance as opposed to HRV time domain results. The highest value of Tone was observed in the Borg-RPE 9-12 range indicating paramount sympathetic dominance. The use of multi-lag in T-E 2D space improved the separation of HRV with reference to the Borg-RPE intervals (p<0.05), except between the 13-16 and 17-20 ranges of the Borg-RPE. Results highlighted the analytical power of T-E in assessing both HRV changes and the sympatho-vagal balance throughout a graded exercise. Potentially, T-E analysis can be applied to assess rehabilitation settings and to get further information on ANS modulation at high exercise intensities.

Original languageEnglish
Title of host publication40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2018
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages5286-5289
Number of pages4
Volume2018-July
ISBN (Electronic)9781538636466
DOIs
Publication statusPublished - 26 Oct 2018
Event40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2018 - Hawaii Convention Center, Honolulu, United States
Duration: 17 Jul 201821 Jul 2018
https://embc.embs.org/2018/ (conference website)

Conference

Conference40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2018
Abbreviated titleLearning from the past, looking to the future
CountryUnited States
CityHonolulu
Period17/07/1821/07/18
OtherThe IEEE Engineering in Medicine and Biology Society is pleased to announce the 40th International Engineering in Medicine and Biology Conference, to be held in Honolulu, Hawaii from July 17-21, 2018. The theme of the meeting is “Learning from the Past, Looking to the Future”, inspired by the 40th anniversary of the world’s largest international biomedical engineering meeting.
Internet address

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