Study of target amount of vitamin D intake for athletes

Study of target amount of vitamin D intake for athletes - Study of target amount of vitamin D intake for athletes

Status

Active, not recruiting

Phases

Unknown

Study type

Interventional

Source

JPRN

Registry ID

JPRN-UMIN000046325

Enrollment

Registered

2021-12-15

Start date

2019-01-15

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

Insufficiency and deficiency of vitamin D

Interventions

vitamin D3 supplementation 1 tablete per day (vitamin D3 25 micrrgram) 31 days placebo tablet supplementation 1 tablet per day 31 days

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: Male players belonging to the Teikyo University Ekiden Race Team

Exclusion criteria

Exclusion criteria: Injury Non-participation of practice Use of calcium and vitamin D supplements

Design outcomes

Primary

Measure	Time frame
Change(rate of change) of serum 25OHD concentration	—

Countries

Japan

Contacts

Public ContactMAMI TORAISHI

Teikyo University Institute of Sports Science & Medicine

mtoraishi0824@yahoo.co.jp042-690-5588

Outcome results

None listed

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