| Title |
Effect of Vitamin D supplementation on body composition and cardiorespiratory fitness in overweight men—a randomized controlled trial
|
|---|---|
| Published in |
Endocrine, July 2018
|
| DOI | 10.1007/s12020-018-1665-6 |
| Pubmed ID | |
| Authors |
Christos Karefylakis, Stefan Särnblad, Annaclara Ariander, Gustaf Ehlersson, Eva Rask, Peter Rask |
| Abstract |
Several observational studies have shown an association between vitamin D deficiency and non-skeletal major health issues including impaired cardiorespiratory fitness and adiposity. Only a few studies have examined the impact of vitamin D supplementation on these conditions and the results are ambiguous. The aim of this study was to examine the effect of vitamin D supplementation on body composition and cardiorespiratory fitness in overweight/obese men with vitamin D deficiency. This study was a prospective, placebo controlled, double blinded, randomized trial with a study period of 6 months. Forty overweight/obese men (BMI > 25 kg/m2) with vitamin D deficiency (25(OH)D ≤ 55 nmol/L) were randomized to receive either 2000 IU Cholecalciferol drops or the equivalent amount of drops of placebo. At baseline and follow up body composition and cardiorespiratory fitness were measured and blood samples were obtained. Body composition was measured using bioelectrical impedance analysis (BIA) and cardiorespiratory fitness using cardiopulmonary exercise test (CPET). The primary outcomes were changes in percentage body fat and in maximum oxygen uptake (VO2max). No statistically significant difference between the placebo and the intervention group regarding changes in percentage body fat (p = 0.54) and VO2max (p = 0.90) was observed. Moreover, there was no statistically significant difference between the groups concerning changes in BMI (p = 0.26), maximum load (p = 0.89) and oxygen uptake at anaerobic threshold (AT) (p = 0.14). We conclude that treatment with 2000 IU/d vitamin D for 6 months does not impact body composition or maximum oxygen uptake in overweight/obese men with vitamin D deficiency. |
X Demographics
The data shown below were collected from the profiles of 4 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 25% |
| Japan | 1 | 25% |
| Netherlands | 1 | 25% |
| Unknown | 1 | 25% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Practitioners (doctors, other healthcare professionals) | 2 | 50% |
| Scientists | 1 | 25% |
| Members of the public | 1 | 25% |
Mendeley readers
The data shown below were compiled from readership statistics for 104 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 104 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 15 | 14% |
| Student > Bachelor | 14 | 13% |
| Student > Ph. D. Student | 6 | 6% |
| Student > Doctoral Student | 5 | 5% |
| Researcher | 5 | 5% |
| Other | 16 | 15% |
| Unknown | 43 | 41% |
| Readers by discipline | Count | As % |
|---|---|---|
| Medicine and Dentistry | 13 | 13% |
| Sports and Recreations | 11 | 11% |
| Nursing and Health Professions | 10 | 10% |
| Agricultural and Biological Sciences | 4 | 4% |
| Biochemistry, Genetics and Molecular Biology | 4 | 4% |
| Other | 14 | 13% |
| Unknown | 48 | 46% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 31 January 2019.
All research outputs
#16,919,456
of 25,654,806 outputs
Outputs from Endocrine
#1,087
of 1,951 outputs
Outputs of similar age
#211,031
of 341,653 outputs
Outputs of similar age from Endocrine
#24
of 42 outputs
Altmetric has tracked 25,654,806 research outputs across all sources so far. This one is in the 32nd percentile – i.e., 32% of other outputs scored the same or lower than it.
So far Altmetric has tracked 1,951 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.9. This one is in the 41st percentile – i.e., 41% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 341,653 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 35th percentile – i.e., 35% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 42 others from the same source and published within six weeks on either side of this one. This one is in the 42nd percentile – i.e., 42% of its contemporaries scored the same or lower than it.