Effects of Acute Manipulation of Carbohydrate Availability (Train-Low Compete-Low vs Train-High Compete-High) on Sprint and Endurance Performance in Ethiopian Middle-Distance Runners: A Randomized Crossover Study

Effects of Acute Carbohydrate Availability on Sprint and Middle-Distance Time-Trial Performance of Young Ethiopian Middle-Distance Runners: A Randomized Crossover Trial

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

PACTR

Registry ID

PACTR202607770864110

Enrollment

Registered

2026-07-07

Start date

2025-06-09

Completion date

Unknown

Last updated

2026-09-14

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Nutritional, Metabolic, Endocrine

Interventions

Train Low Compete Low

Train High Compete High

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: 1. Age = 18 years 2. Registered middle-distance runners at the Ethiopian Sports Academy 3. Regular participation in structured endurance training 4. Free from injury at the time of testing 5. Willing to provide informed consent

Exclusion criteria

Exclusion criteria: 1. Musculoskeletal injury or illness during the testing period 2. Chronic metabolic or cardiovascular disease 3. Non-compliance with dietary protocol 4. Withdrawal of consent

Design outcomes

Primary

Measure	Time frame
800 m runners performed an 800 m time trial. 1500 m runners performed a 1500 m time trial. 3000 m runners performed a 3000 m time trial. 5000 m runners performed a 5000 m time trial	—

Secondary

Measure	Time frame
Sprint performance (10 m, 30 m, and 40 m) Description: Sprint times measured using the Witty Timing System (Microgate S.r.l., Bolzano, Italy). Rating of Perceived Exertion (RPE) Description: Perceived exercise intensity assessed using the Borg Rating of Perceived Exertion Scale.	—

Countries

Ethiopia

Contacts

Public ContactAmensisa Kebede

Secretary General Ethiopian Athletics Federation

esaresearch488@gmail.com+251911179328

Outcome results

None listed

Source: PACTR (via WHO ICTRP) · Data processed: Sep 19, 2026