What the study found
HRV measures correlated differently with 50-metre and 100-metre performance, and the relationships depended on when HRV was measured.
Participants and protocol
Thirteen male national-level swimmers had HRV recorded in the morning, before training and during early recovery; researchers compared these measures with seasonal race times.
What this cannot establish
Correlations in a small sample do not prove that raising or lowering HRV improves performance. The study cannot define a universal readiness threshold or support chasing a particular HRV value.
Publication details
- Record
- PubMed 25471271
- Indexed subjects
- Vagus Nerve · Heart Rate · Physical Endurance · Swimming · Athletic Performance
- Source record checked
- 2026-10-18
Publication type and subject indexing describe the record; they are not a quality grade or proof of a benefit. An abstract does not replace a review of the full methods and results.
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