Effects of Creatine Supplementation on Endurance Exercise Performance with Varying Exercise Intensity

Effects of Creatine Supplementation on Endurance Exercise Performance with Varying Exercise Intensity - Effects of Creatine Supplementation on Endurance Exercise Performance with Varying Exercise Intensity

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000059369

Enrollment

Registered

2025-10-10

Start date

2025-11-01

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Healthy adults / University-affiliated cross-country ski athletes

Interventions

Creatine supplementation (20 g per day for 6 days) Continue normal daily activities

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: 1.Cross-country skiing athletes belonging to the university 2.Individuals who have provided written informed consent to participate in the study

Exclusion criteria

Exclusion criteria: 1.Individuals with musculoskeletal disorders that may interfere with exercise performance 2.Individuals with respiratory, cardiovascular, metabolic, or other conditions that may pose a health risk during exercise 3.Individuals with infections, such as fever or acute infectious diseases 4.Individuals currently taking medications that may affect the study outcomes 5.Individuals who plan to consume caffeine during the study period

Design outcomes

Primary

Measure	Time frame
Exercise duration until exhaustion	—

Secondary

Measure	Time frame
Rating of Perceived Exertion, Respiratory Exchange Ratio, Oxygen Uptake, Ventilatory Threshold, Anaerobic Threshold	—

Countries

Japan

Contacts

Public ContactHyeon-Ki Kim

Tohoku University Graduate School of Medicine

hyeon-ki.kim.c8@tohoku.ac.jp022-717-8586

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026