Effects of acute sleep deprivation and extreme fatigue on cognitive performance and cardiac autonomic function during an expedition adventure race: a case report
Bibliographic record
Abstract
Four ultra-endurance athletes (3M/1F) navigated ~800 km via trekking, biking, and paddling using topographical maps and compass, sleeping ~6 h each. Mood, cognitive performance, and heart rate variability were measured at baseline (PRE), post-race (POST), and 18-h post-race (POST18). Decreased anxiety (ΔMdn = 6.5, p = 0.047) along with increased fatigue (ΔMdn = 13.5, p = 0.02) and confusion (ΔMdn = 5.5, p = 0.02) at POST, and improved reaction time (ΔMdn = 0.12 ms, p = 0.04) at POST18 were observed. Findings suggest that extreme exertion and acute sleep-deprivation can elevate psychological stress; however, improvements 18-h post-race indicates recovery. Findings may have applications for professionals operating under extreme stress, e.g., military, healthcare professionals, disaster response, and elite sport.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.002 | 0.002 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.003 | 0.002 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".