10,000 IU Vitamin D raised basketball player levels (more than 50 ng need to improve performance) – June 2022

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Vitamin D in Basketball Players: Current Evidence and Future Directions

Sports Health. 2022 May-Jun; 14(3): 377–388. doi: 10.1177/19417381211019343
Emilija Stojanović, PhD,*†‡ Dragan Radovanović, MD, PhD,† Tamara Hew-Butler, PhD,§ Dušan Hamar, MD, PhD,‖ and Vladimir Jakovljević, MD, PhD‡¶

Context:
Despite growing interest in quantifying and correcting vitamin D inadequacy in basketball players, a critical synthesis of these data is yet to be performed to overcome the low generalizability of findings from individual studies.

Objective:
To provide a comprehensive analysis of data in basketball pertaining to (1) the prevalence of vitamin D inadequacy; (2) the effects of vitamin D supplementation on 25-hydroxyvitamin D [25(OH)D] concentration (and its association with body composition), bone health, and performance; and (3) crucial aspects that warrant further investigation.

Data Sources: PubMed, MEDLINE, ERIC, Google Scholar, SCIndex, and ScienceDirect databases were searched.

Study Selection: After screening, 15 studies were included in the systematic review and meta-analysis.

Study Design: Systematic review and meta-analysis.

Level of Evidence: Level 3.

Data Extraction: The prevalence of vitamin D inadequacy, serum 25(OH)D, body composition, stress fractures, and physical performance were extracted.

Results:
The pooled prevalence of vitamin D inadequacy for 527 basketball players in 14 studies was 77% (P < 0.001; 95% CI, 0.70-0.84). Supplementation with 4000 IU/d and 4000 IU/wk (absolute mean difference [AMD]: 25.39 nmol/L; P < 0.001; 95% CI, 13.44-37.33), as well as 10,000 IU/d (AMD: 100.01; P < 0.001; 95% CI, 70.39-129.63) vitamin D restored 25(OH)D to normal concentrations. Body composition data revealed inverse correlations between changes in serum 25(OH)D (from pre- to post supplementation) and body fat (r = −0.80; very large). Data concerning positive impacts of vitamin D supplementation on bone health and physical performance remain sparse.

Conclusion:
The high proportion of vitamin D inadequacy underscores the need to screen for serum 25(OH)D in basketball players. Although supplementation restored vitamin D sufficiency, the beneficial effects on bone health and physical performance remain sparse
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VitaminDWiki - Overview Sports and vitamin D contains

Athletes are helped by vitamin D by:

1. Faster reaction time
2. Far fewer colds/flus during the winter
3. Less sore/tired after a workout
4. Fewer micro-cracks and broken bones
5. Bones which do break heal much more quickly
6. Increased VO2 and exercise endurance Feb 2011
7. Indoor athletes especially need vitamin D
8. Professional indoor athletes are starting to take vitamin D and/or use UV beds
9. Olympic athletes have used UV/vitamin D since the 1930's
10. The biggest gain from the use of vitamin D is by those who exercise less than 2 hours per day.
11. Reduced muscle fatigue with 10,000 IU vitamin D daily
12. Muscle strength improved when vitamin D added: 3 Meta-analysis
13. Reduced Concussions
    See also: Sports and Vitamin D category 284 items

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VitaminDWiki - Sports category contains

284 items in Sports category

Sports benefits from up to 50 ng (click on chart for details)

see also:
Overview Sports and vitamin D     Concussions
Military    Muscle    Overview Fractures and vitamin D
Vitamin D supplementation increases strength of lower muscles – Meta-analysis April 2019
Athletes helped by weekly 50,000 IU Vitamin D – RCT Aug 2019
College swimmers helped by daily 5,000 IU of Vitamin D in the fall – RCT Feb 2020
Shin splints decrease with vitamin D
Less muscle inflammation after exercise if high level of Vitamin D (50 ng) -July 2021 50 ng
Only 1 NCAA basketball player getting 10,000 IU vitamin D daily achieved 50 ng goal – Jan 2020 50 ng
NCAA trainers are getting on board the Vitamin D train (40-50 ng)– Nov 2019 50 ng
Is 50 ng of vitamin D too high, just right, or not enough 50 ng
The only independent predictor of aerobic power: Vitamin D - 2021
Olympic Committee consensus on Vitamin D, Omega-3, Zinc, etc– May 2018 not consdered "doping"
Some Foot and ankle problems are treated by Vitamin D – many studies
Typical stress fracture during US Navy training cost 14,953 dollars, most had less than 40 ng Vitamin D - June 2022
Vitamin D trials by military – all 4 found benefit – review Sept 2019
Vitamin D supplementation increases strength of lower muscles – Meta-analysis April 2019
Omega-3 helps muscles - many studies