Cardiac parasympathetic activity and race performance: An elite triathlete case study

Stanley, Jamie, D'Auria, Shaun and Buchheit, Martin (2015) Cardiac parasympathetic activity and race performance: An elite triathlete case study. International Journal of Sports Physiology and Performance, 10 4: 528-534. doi:10.1123/ijspp.2014-0196


Author Stanley, Jamie
D'Auria, Shaun
Buchheit, Martin
Title Cardiac parasympathetic activity and race performance: An elite triathlete case study
Journal name International Journal of Sports Physiology and Performance   Check publisher's open access policy
ISSN 1555-0265
1555-0273
Publication date 2015-05-01
Year available 2015
Sub-type Article (original research)
DOI 10.1123/ijspp.2014-0196
Open Access Status Not yet assessed
Volume 10
Issue 4
Start page 528
End page 534
Total pages 7
Place of publication Champaign, United States
Publisher Human Kinetics
Language eng
Abstract The authors examined whether changes in heart-rate (HR) variability (HRV) could consistently track adaptation to training and race performance during a 32-wk competitive season. An elite male long-course triathlete recorded resting HR (RHR) each morning, and vagal-related indices of HRV (natural logarithm of the square root of mean squared differences of successive R–R intervals [ln rMSSD] and the ratio of ln rMSSD to R–R interval length [ln rMSSD:RR]) were assessed. Daily training load was quantified using a power meter and wrist-top GPS device. Trends in HRV indices and training load were examined by calculating standardized differences (ES). The following trends in week-to-week changes were consistently observed: (1) When the triathlete was coping with a training block, RHR decreased (ES –0.38 [90% confidence limits –0.05;–0.72]) and ln rMSSD increased (+0.36 [0.71;0.00]). (2) When the triathlete was not coping, RHR increased (+0.65 [1.29;0.00]) and ln rMSSD decreased (–0.60 [0.00;–1.20]). (3) Optimal competition performance was associated with moderate decreases in ln rMSSD (–0.86 [–0.76;–0.95]) and ln rMSSD:RR (–0.90 [–0.60;–1.20]) in the week before competition. (4) Suboptimal competition performance was associated with small decreases in ln rMSSD (–0.25 [–0.76;–0.95]) and trivial changes in ln rMSSD:RR (–0.04 [0.50;–0.57]) in the week before competition. To conclude, in this triathlete, a decrease in RHR concurrent with increased ln rMSSD compared with the previous week consistently appears indicative of positive training adaptation during a training block. A simultaneous reduction in ln rMSSD and ln rMSSD:RR during the final week preceding competition appears consistently indicative of optimal performance.
Keyword Monitoring
Cardiac parasympathetic function
Triathlon
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2016 Collection
School of Human Movement and Nutrition Sciences Publications
 
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