A single mega dose of vitamin D3 improves selected physical variables in vitamin D insufficient young amateur soccer players: a randomized controlled trial.
Appl Physiol Nutr Metab. 2019 Oct 9. doi: 10.1139/apnm-2019-0525.
Single dose to deficient and measured improvements 12 weeks later
- Wonder what "F" means in the table statistics
- Abstract does not indicate # of children
- Abstract does not indicate defined level of Vitamin D deficiency
Note: Should continue Vitamin D dosing after 8 weeks
- See Infant-Child At least 15,000 IU/25 lbs per 2 weeks
Overview Sports and vitamin D has the following summary
Athletes are helped by vitamin D by:
- Faster reaction time
- Far fewer colds/flus during the winter
- Less sore/tired after a workout
- Fewer micro-cracks and broken bones
- Bones which do break heal much more quickly
- Increased VO2 and exercise endurance Feb 2011
- Indoor athletes especially need vitamin D
- Professional indoor athletes are starting to take vitamin D and/or use UV beds
- Olympic athletes have used UV/vitamin D since the 1930's
- The biggest gain from the use of vitamin D is by those who exercise less than 2 hours per day.
- Reduced muscle fatigue with 10,000 IU vitamin D daily
- Muscle strength improved when vitamin D added: 3 Meta-analysis
- Reduced Concussions
See also: Sports and Vitamin D category
- Athletes helped by weekly 50,000 IU Vitamin D – RCT Aug 2019
- Mechanisms of vitamin D action in skeletal muscle – June 2019
- Recreational athletes having more than 20 ng of vitamin D run faster – Dec 2018
- Result of 5 years of Vitamin D given to athletes in a high school: $60 million in scholarships, almost zero concussions, etc. - June 2016
Download the PDF from Sci-Hub via VitaminDWiki
Note - Levels peak in 1 week and decrease a lot 12 weeks later
Bezrati I1,2, Ben Fradj MK3, Hammami R4, Ouerghi N5, Padulo J6,7, Feki M8.
1 National Center of Medicine and Sciences in Sports , 2010 Tunis, Tunisia , tunis, Tunisia , 2010.
2 Rabta Hospital, Laboratory of Biochemistry , 1007 Tunis, Tunisia , Tunisia ; firstname.lastname@example.org.
3 Rabta Hospital , rue jbal lakhthar , Tunis, Tunisia , 8050 ; email@example.com.
4 National Center of Medicine and Science in Sports, 504792, Tunis, Tunis, Tunisia ; firstname.lastname@example.org.
5 High Institute of Sports and Physical Education of Kef, Kef, Tunisia ; email@example.com.
6 University eCampus, Novedrate, Italy , Via Isimbardi 10 , Novedrate (CO), Italy , 22060.
7 National Centre for Medicine and Science in Sports, Tunisian Research laboratory, Tunis, Tunisia , BP263 ; firstname.lastname@example.org.
8 Université de Tunis El Manar Faculté de Médecine de Tunis, 59074, Biochemistry, Tunis, Tunisia ; email@example.com.
This randomized controlled trial aimed to test whether vitamin D (VD) supplementation affects measures of physical performance in VD-insufficient mildly trained children. Thirty-six recreationally soccer player boys were randomly assigned to single dose (200,000 IU) of VD3 (n=19) or placebo (n=17). Plasma 25-hydroxyvitamin D (25-OHD) was assessed and measures of physical performance (i.e. vertical and standing broad jumps, triple hop, 10-m and 30-m sprints, shuttle run) were performed before and 12 weeks after the loading dose. Mixed ANCOVA models were performed and effect size was estimated by partial eta squared (ηp2). Baseline 25-OHD and physical variables were equivalent in the two groups. Twelve weeks after VD loading, plasma 25-OHD increased and physical variables improved in VD group, only.
There was a significant interaction effects for group by time for
vertical jump (F=14.9, p=0.001, ηp2=0.394) triple hop jump (F=24.2, p<0.001, ηp2=0.513) 10-m sprint (F=4.46, p=0.046, ηp2=0.162) 30-m sprint (F=6.56, p=0.017, ηp2=0.222) shuttle run F=13.4, p=0.001, ηp2=0.369).
In conclusion, a single bolus of VD3 resulted in significant improvements in jumping ability, agility, and running speed in VD-insufficient mildly trained children. The findings suggest that correcting VD deficit might be beneficial for physical performance.
• A mega dose of vitamin D3 improves jumping ability, agility, and running speed in VD-insufficient mildly trained children
• Effect of vitamin D on measures of physical performance is noticeable three months after the loading dose.