Can the use of a single integrated unitary autonomic index provide early clues for eventual eligibility for olympic games?
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Optimal autonomic regulation and stress resilience might be considered critical elements of athletic performance. We hypothesize that a novel unitary autonomic index for sports (ANSIs), together with a somatic stress related symptom score (4SQ) might help characterize athletes who were eventually selected for the Rio 2016 Olympic Games Italian team (Rio +).
In this retrospective study we examined 778 athletes (age 24.4 ± 6.7 yrs) who underwent a planned yearly pre-participation screening. All athletes underwent clinical, autonomic and exercise ECG evaluation. The combination of vagal and sympathetic indices from RR variability into ANSIs was performed by radar plot and percent ranking of index variables. We assessed (Rio +) versus (Rio −) athletes also after subdivision into three sport intensity groups (low, mid and high intensity).
Overall there were no significant differences between (Rio +) and (Rio −) athletes when considering individual spectral derived variables. Conversely, the unitary Index ANSIs was significantly higher in (Rio +) compared to (Rio −) athletes (respectively 54.5 ± 29.5 and 47.9 ± 28.4 p = 0.014). This difference was particularly evident (p = 0.017) in the group of athletes characterized by both high static and dynamic components. 4SQ was smaller in the (Rio +) group, particularly in the groups of athletes characterized by both low-medium static and dynamic components.
ANSIs, a proxy of integrated cardiac autonomic regulation and simple assessment of resilience to stress, may differentiate Italian athletes who were eventually selected for participation in the 2016 Rio Olympic Games from those who were not, suggesting the possibility of a “winning functional phenotype”.
KeywordsOlympic Games Elite athletes Autonomic nervous system Stress resilience
Somatic Stress Related Symptom Score
Autonomic nervous system
Unitary multivariate percent ranked ANS index
Unitary autonomic index for sports
Body mass index
ECG chest lead
Italian national olympic committee
Heart rate variability
RR Interval variability
Statistical package for the social sciences
We would like to thank Dana Alon Shiffer (LA, CA, USA) for mother tongue language and English style assistance.
Compliance with ethical standards
Conflict of interest
Authors declare that they have no conflict of interest.
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