From: Plausible ergogenic effects of vitamin D on athletic performance and recovery
Author | Reference # | Population | Subjects/Specimens | Type of Study | Intervention | Duration | Results |
---|---|---|---|---|---|---|---|
Ceglia et al. 2013 | [55] | Elderly | 21 Mobility-Limited Women (age 2 65) with 25{OH)D levels of 225 to 60 nmol/L | Intervention - RCT- Placebo + Double Blind | 4000 lU/Day of Vitamin D or Placebo | 4 Months | Vitamin D3 supplementation ↑ intramyonuclear VDR concentration by 30 % and increased muscle fiber size by 10 % in older, mobility-limited, vitamin D- insufficient women. |
Close et al. 2013 | [56] | Athletes | 10 Male Professional Soccer Players | Correlation + Intervention - RCT | 5000 lU/Day of Vitamin D3 or Placebo | 8 Weeks | Vitamin D vs Placebo: (1) ↑ Serum 25 hydroxyvitamin D (2) ↑ in Vertical Jump (3) Faster 10 m sprint times |
Close et al. 2013 | [10] | Athletes | 30 Club-Level Athletes from UK | Intervention - RCT | Three Groups: Placebo, 20,000lU/Week, or 40,000 IU/week of Oral Vitamin D3 (Performance Testing: 1-RM Bench Press, 1-RM Leg Press and Vertical Jump) | 12 Weeks | Both 20,000 IU and 40,000 IU of Vitamin D3 ↑ 25(OH)D over > 50 nmol/L, but had no effect on any performance measurement |
Fitzgeral et al. 2014 | [41] | Athletes | 52 Caucasian Competitive Ice Hockey Players (age 20.1 ± 1.5) (V02max 54.6 ± 4.3) | Cross-sectional | Performance Testing: Maximal Oxygen Uptake (V02peak), Max Heart Rate (HR), Peak RER, Total Exercise Time | 1 Month Recruiting Phase During Off-Season (May to June) | All Athletes had 25(OH)D Levels £65.0 ng/mL, 37.7 % of the Athletes had 25(OH)D levels of < 32 ng/mL & 25(OH) D status was not significantly associated with any parameter measured |
Forney et al. 2014 | [42] | Active College Students | 39 Phyiscally Active College Students(20 Males, 19 Females) | Correlation | 25(0H)D Levels of 20.97 ± 1.97 ng/mL (N = 20) or44.15 ± 2.17 ng/mL (N = 19)- Primary Outcomes: BMI, % Body Fat, Resting Metabolic Rate, Maximal Oxygen Uptake (V02max), Power Output (Watts), and Muscle Strength | 14 Days | Significant positive relationship seen between V02max and 25(OH)D & Significant negative relationship seen between BMI and 25(OH)D |