Energy Availability and Its Impact in Elite Triathletes
TriatLEA
Energy Availability in Elite Triathletes: Impact on Performance and Injury Risk
2 other identifiers
observational
40
1 country
1
Brief Summary
This study investigates how energy availability affects performance, injury risk, and training outcomes in elite triathletes. Over two competitive seasons (2026-2027), 40 elite and sub-elite triathletes will be monitored through physiological tests, blood samples, and questionnaires. The goal is to identify markers of low energy availability and understand its impact on health and athletic performance. The study is observational and does not involve experimental treatments. Participants continue their regular training and diet while undergoing periodic assessments.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P25-P50 for all trials
Started Oct 2025
Typical duration for all trials
1 active site
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
Study Start
First participant enrolled
October 1, 2025
CompletedFirst Submitted
Initial submission to the registry
November 14, 2025
CompletedFirst Posted
Study publicly available on registry
November 18, 2025
CompletedPrimary Completion
Last participant's last visit for primary outcome
November 30, 2027
ExpectedStudy Completion
Last participant's last visit for all outcomes
June 1, 2028
November 18, 2025
November 1, 2025
2.2 years
November 14, 2025
November 14, 2025
Conditions
Keywords
Outcome Measures
Primary Outcomes (1)
T3
Plasma triiodothyronine (T3) levels
Two years - from off-season 2025 until in-season 2027
Secondary Outcomes (22)
RER
Two years - from off-season 2025 until in-season 2027
Bone mineral density
Two years - from off-season 2025 until in-season 2027
Fat free mass
Two years - from off-season 2025 until in-season 2027
Appendicular fat free mass
Two years - from off-season 2025 until in-season 2027
Fat mass
Two years - from off-season 2025 until in-season 2027
- +17 more secondary outcomes
Study Arms (1)
Triathletes
Elite triathletes
Eligibility Criteria
Elite triathletes with a weekly training volume of more than 15 hours
You may qualify if:
- Age ≥18 years
- Healthy individuals
- Training ≥15 hours/week in triathlon
You may not qualify if:
- Smokers
- Use of prohibited substances (WADA list) without medical justification
- Existing injuries or illnesses that could worsen due to participation
Contact the study team to confirm eligibility.
Sponsors & Collaborators
Study Sites (1)
Institute of Sports Medicine Copenhagen, Bispebjerg Hospital
Copenhagen, Denmark
Related Links
Biospecimen
Plasma and serum samples
MeSH Terms
Conditions
Condition Hierarchy (Ancestors)
Central Study Contacts
Study Design
- Study Type
- observational
- Observational Model
- COHORT
- Time Perspective
- PROSPECTIVE
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Senior Researcher, Ph.D.
Study Record Dates
First Submitted
November 14, 2025
First Posted
November 18, 2025
Study Start
October 1, 2025
Primary Completion (Estimated)
November 30, 2027
Study Completion (Estimated)
June 1, 2028
Last Updated
November 18, 2025
Record last verified: 2025-11