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Study note

Nutrition for Ultramarathon Running: Trail, Track, and Road.

PMID 30943823 (2019): carbohydrate, carb — Time to exhaustion, Time-trial performance, Fat oxidation (study note for endurance athletes).

Updated Jul 22, 2026

Read the study note

Study note • PMID 30943823

Nutrition for Ultramarathon Running: Trail, Track, and Road.

International journal of sport nutrition and exercise metabolism2019 • DOI 10.1123/ijsnem.2018-0255

How to use this page

This note summarizes one study record. Check the participants, methods, results, and limitations before applying it to training.

  • Design signal: review.
  • Population relevance: mixed/unclear athlete specificity.
  • Consistency: single-study evidence.
  • Practical recommendation depends on tolerance, context, and whether it protects training consistency.

ELI5

In plain language

Ultramarathon running events and participation numbers have increased progressively over the past three decades. (review; runners).

In this review, the abstract suggests a positive relationship with Time-trial performance, Fat oxidation. Treat this as a signal, not a guarantee; confirm methods and context in the full paper.

Takeaways

What the abstract suggests

  • Study question: Ultramarathon running events and participation numbers have increased progressively over the past three decades.
  • In this review, the abstract suggests a positive relationship with Time-trial performance, Fat oxidation.
  • Population: runners.
  • Protocol cues: abstract may omit dose/timing; use the full paper to replicate accurately.

Protocol

Protocol (as reported)

  • Intervention/exposure: carbohydrate, carb.
  • Dose/time/duration: abstract doesn’t include enough detail; use the full paper’s methods section.
  • Outcomes: Time to exhaustion, Time-trial performance, Fat oxidation.
  • Replication note: abstracts often omit adherence and timing; confirm details before changing training or supplementation.

Fit

Who it may help, and who should be cautious

Who it helps

  • Athletes similar to the study population (runners) working on fueling.
  • Athletes who can measure Time to exhaustion, Time-trial performance, Fat oxidation with a repeatable workout or time-trial effort.

Who should be cautious

  • If you have symptoms or conditions that make the intervention risky, get professional guidance.
  • If you’re near race day and can’t safely test, defer the experiment.

Methods

What the study actually did

  • Design: review.
  • Population: runners.
  • Outcomes measured: Time to exhaustion, Time-trial performance, Fat oxidation.
  • Source: PubMed PMID 30943823 (2019) — International journal of sport nutrition and exercise metabolism.

Results excerpt

What the abstract reports

Ultramarathon running events and participation numbers have increased progressively over the past three decades.

Note: excerpts are short; for full context, read the paper.

Limits

Limitations and bias

  • Abstract-only summaries can miss critical details (population, protocol, adherence, and context).
  • Reviews and consensus statements mix protocols and populations; recommendations may not match your exact constraints.
  • If your context differs (elite vs recreational; cycling vs running), adjust expectations and be conservative.
  • This is performance information, not medical advice.

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