| Title |
Effect of a 6-week supervised detraining period on bone metabolism markers and their association with ergometrics and components of the hypothalamic–pituitary–gonadal (HPG) axis in professional male soccer players
|
|---|---|
| Published in |
Journal of Bone and Mineral Metabolism, September 2018
|
| DOI | 10.1007/s00774-018-0947-7 |
| Pubmed ID | |
| Authors |
Nikolaos E. Koundourakis, Nikolaos Androulakis, Eirini Dermitzaki, Maria Venihaki, Andrew N. Margioris |
| Abstract |
The aim of this study was to examine the effect of a supervised 6-week detraining period on bone metabolism markers, and their association with ergometrics, and components of the hypothalamic-pituitary-gonadal (HPG) axis in elite male professional soccer players. Sixty-seven soccer players (mean age ± SD 23.4 ± 5.2 years) that were following a supervised training program participated in this study. Players were tested twice: immediately after the conclusion of the competition period, and following the detraining period, for the determination of bone-turnover rates, ergometrics, and components of the HPG-axis. The detraining period resulted in significant reduction in osteocalcin [OC] (p < 0.001), C-terminal propeptide of collagen type-I [CICP] (p = 0.002), and bone-alkaline-phosphatase [b-ALP] (p < 0.001) values, while C-terminal telopeptide [CTX] was increased (p < 0.001). No significant relationships were apparent between bone biomarkers and body weight, body-fat %, total testosterone, free testosterone, estradiol, follicle-stimulating hormone, and luteinizing hormone in both experimental sessions (p > 0.05). Similarly, despite the deterioration in ergometrics after detraining (all p < 0.001), no significant correlations were evident (p > 0.05) between bone biomarkers and maximal oxygen consumption, squat jump, countermovement jump, and 20 m sprint performance, and also between % change of bone biomarkers and ergometrics, apart from a weak relationship (p = 0.041) between OC and VO2max of questionable value. Our results suggest that the 6-week soccer off-season detraining period in our study negatively affected bone physiology as reflected by the suppression of bone-formation rate and a parallel induction of bone resorption. The cause of this acute alteration of bone-turnover rates is not related to the examined components of the HPG-axis, although parallels is not associated with the changes in ergometrics. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Greece | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Practitioners (doctors, other healthcare professionals) | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 56 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 56 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Master | 7 | 13% |
| Student > Bachelor | 5 | 9% |
| Student > Ph. D. Student | 5 | 9% |
| Student > Doctoral Student | 4 | 7% |
| Professor | 4 | 7% |
| Other | 7 | 13% |
| Unknown | 24 | 43% |
| Readers by discipline | Count | As % |
|---|---|---|
| Sports and Recreations | 15 | 27% |
| Medicine and Dentistry | 6 | 11% |
| Nursing and Health Professions | 3 | 5% |
| Unspecified | 1 | 2% |
| Psychology | 1 | 2% |
| Other | 3 | 5% |
| Unknown | 27 | 48% |
Attention Score in Context
This research output has an Altmetric Attention Score of 1. 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 08 September 2018.
All research outputs
#21,180,380
of 23,842,189 outputs
Outputs from Journal of Bone and Mineral Metabolism
#563
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#294,744
of 337,487 outputs
Outputs of similar age from Journal of Bone and Mineral Metabolism
#7
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