Older age and less frequent endurance training habits predict the likelihood of illness during Arctic military training
Survival analysis showed that older age and less frequent endurance training habits significantly predicted the likelihood of viral illness among cadets during a 2-week near-Arctic winter training. The study included 49 cadets, with a naturalistic viral infection outbreak in first-year cadets providing the experimental context.
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Older age and less frequent endurance training habits predict the likelihood of illness during Arctic military training The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).
The Claim
Older age and less frequent endurance training habits predict the likelihood of illness during Arctic military training
This conclusion is most relevant to: 49 cadets (first-year and second-year) undergoing 2-week near-Arctic winter military training.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Physical and mental load of tactical athletes during Arctic military training. (Frontiers in sports and active living, 2026) —
How It Works
The proposed biological pathway:
- ▸Older age and lower endurance training frequency are identified as risk factors
- ▸These factors may reduce physiological resilience or immune function
- ▸Exposure to harsh Arctic environment and close quarters increases infection risk
- ▸Result: Higher likelihood of viral illness during training
Who Might Benefit
Evidence fit by population:
- ▸49 cadets (first-year and second-year) undergoing 2-week near-Arctic winter military training
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Small sample size (n=49) limits generalizability
- ▸Naturalistic viral infection outbreak was a chance occurrence, not controlled
- ▸Observational design cannot establish causation
Frequently Asked Questions
What factors predicted illness in Arctic military training?▼
Older age and less frequent endurance training habits significantly predicted the likelihood of viral illness during the 2-week training.
How was the study conducted?▼
It was an observational cohort study of 49 cadets during near-Arctic winter training, with wrist-worn accelerometers, daily self-reports, and body composition measurements.
What was the role of the viral infection in the study?▼
A chance outbreak of viral infection in first-year cadets provided a naturalistic experiment to study vulnerability to illness.
What are the practical implications for military leaders?▼
Leaders should be aware that mental load affects performance not just during combat but also during preparation and cleanup phases, and that aerobic fitness and experience may reduce illness risk.
References
- 1.van den Berg NH, Michaud X, Vaara JP, Ojanen T, Kyröläinen H, Martin A, Haman F, Heikkinen R, Van Cutsem J, Pattyn N, Helen J, Simonelli G. “Physical and mental load of tactical athletes during Arctic military training..” Frontiers in sports and active living, 2026. PMID: 42524425 DOI: 10.3389/fspor.2026.1861009