Component
Weight gain during endurance exercise
Weight gain during endurance exercise. Species, exposure and limitations are retained in each linked claim.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
What it acts on
Weight gain during the marathon was independently associated with hyponatremia, odds ratio 4.2 (95% CI 2.2–8.2).
Experimental context and source evidence
- availability_state
- biomarker_context Imported condition classification; unverified.
- evidence_span
- {"source_cache": "artifacts/sodium-research/15829535.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "9bf7f638ff3cfcad3d43536a75ffedf40a2ef726f783922f3169c9252c12a8e5", "start_char": 0, "end_char": 1893, "text_sha256": "9bf7f638ff3cfcad3d43536a75ffedf40a2ef726f783922f3169c9252c12a8e5"}
- experimental_model
- Prospective marathon cohort with prerace/postrace weights and blood sampling
- exposure
- 2002 Boston Marathon; 488 usable finish-line blood samples
- limitations
- Observational associations and sampling limitations; fluid composition was not independently associated. Not a treatment protocol or pure dietary-depletion study.
- nutrient_topic
- Sodium research collection; topical membership is not evidence of a direct dietary effect. · Sodium
- organism
- Human runners
- plain_language
- A low sodium concentration can accompany gaining water rather than simply losing salt.
- primary_references
- [sodium-p15829535] Hyponatremia among runners in the Boston Marathon. (2005). https://pubmed.ncbi.nlm.nih.gov/15829535/ DOI: 10.1056/nejmoa043901
- tissue_or_cell_type
- Systemic water/sodium balance
- trigger_kind
- biomarker_context Imported condition classification; unverified.
Sodium: gradients, nutrient transport, fluid regulation and loss states (2026-09-17) · lines 1006–1017
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Prospective marathon cohort with prerace/postrace weights and blood sampling · source_derived_draft · unverified_draft
### sodium-marathon-weight Weight gain during the marathon was independently associated with hyponatremia, odds ratio 4.2 (95% CI 2.2–8.2). Condition category: biomarker_context nutrient_topic: Sodium research collection; topical membership is not evidence of a direct dietary effect. plain_language: A low sodium concentration can accompany gaining water rather than simply losing salt. organism: Human runners tissue_or_cell_type: Systemic water/sodium balance experimental_model: Prospective marathon cohort with prerace/postrace weights and blood sampling limitations: Observational associations and sampling limitations; fluid composition was not independently associated. Not a treatment protocol or pure dietary-depletion study. exposure: 2002 Boston Marathon; 488 usable finish-line blood samples evidence_span: {"source_cache": "artifacts/sodium-research/15829535.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "9bf7f638ff3cfcad3d43536a75ffedf40a2ef726f783922f3169c9252c12a8e5", "start_char": 0, "end_char": 1893, "text_sha256": "9bf7f638ff3cfcad3d43536a75ffedf40a2ef726f783922f3169c9252c12a8e5"} [sodium-p15829535] Hyponatremia among runners in the Boston Marathon. (2005). https://pubmed.ncbi.nlm.nih.gov/15829535/ DOI: 10.1056/nejmoa043901
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.