Managing travel fatigue and jet lag in athletes: review & consensus statement (26-expert panel)
Key Findings
Travel fatigue ≠ jet lag — the statement defines both and treats them separately. Travel fatigue = the journey itself (cramped seating, dehydration, disrupted sleep/meals); resolves with rest, can occur without crossing time zones. Jet lag = circadian misalignment after crossing multiple zones, persists days (definitions from the full text; the abstract confirms the two are distinguished).
Both are described as real, impactful issues for performance and for illness and injury risk — yet evidence on optimal assessment and management is lacking, so recommendations are consensus-strength, not trial-strength.
The statement covers circadian basics and time-givers (zeitgebers), causes and consequences, and consensus recommendations, packaged as travel toolboxes for pre-flight, during flight and post-flight.
Adjustment of roughly 1 day per time zone crossed eastward, 0.5 day per zone westward (full text, checked 2026-09-27; a rule of thumb).
Direction matters: eastward (phase advance) is harder/slower than westward (phase delay), because the human clock runs slightly longer than 24 h and delays more easily. Large individual variation (full text, checked 2026-09-27).
Countermeasures in the toolboxes: timed bright-light exposure/avoidance, correctly-timed melatonin, preserving sleep, strategic caffeine/napping, hydration/meal timing (full text, checked 2026-09-27).
Practical Application
A 26-expert consensus separates travel fatigue (the journey; rest and rehydrate) from jet lag (circadian misalignment; needs re-timing), and its pre-, during- and post-flight toolboxes are the reference plan — while acknowledging the underlying evidence is thin.
Separate the two: long flight, few zones → travel fatigue only (rest day + rehydrate + normal sleep). Don't over-manage as jet lag.
Arrive early: Not from this paper; the base's own practice: plan adaptation days before a key event, using the paper's rule of thumb of about 1 day per zone crossed eastward and 0.5 day per zone westward (full text, checked 2026-09-27).
Light by direction: Not from this paper; the base's own practice: eastward → bright light in destination MORNING, avoid late-evening light; westward → bright light in EVENING, avoid early-morning light. (The paper times light exposure and avoidance in 3-h windows around the core-temperature minimum and, beyond 8 h east, suggests adapting by delay; full text, checked 2026-09-27.)
Melatonin: correctly timed near destination bedtime as a chronobiotic timing tool, not a sleeping pill; most useful eastward; check anti-doping/regulatory status in your country.
Shift sleep/wake gradually toward destination time before important trips.
Limitations
Consensus statement; the panel explicitly notes that the lack of evidence restricts the strength of its recommendations; underlying light/melatonin evidence heterogeneous, often non-athlete/small samples; "1 day/zone" is a planning heuristic.
How this entry was checked and changed
Why this level
regraded 2026-09-27 from B: major consensus / position statement (rubric A); the panel itself states that the lack of evidence limits the strength of its recommendations
Content correction 2026-09-27
Melatonin dose "0.5–5 mg" and "shift 30–60 min/day" removed: not in the abstract, not confidently traceable to the paper.
"1 day per time zone", direction asymmetry and the countermeasure list labelled full-text; added the abstract's framing (26-expert panel, evidence lacking, toolboxes pre/during/post-flight).
Level B -> A per rubric (major consensus statement); Tier "mixed" -> Tier 1-5.
Lines labelled "full text; not checked against the abstract" were checked against the open-access full text (PMC8279034): every number in them appears there; relabelled "full text, checked 2026-09-27".
Lines labelled "full text; not checked" were read against the open-access full text (PMC8279034): 3 corrected to what the paper says; 1 not in the paper — removed or relabelled as the base's own practice.