Biology of Sport
eISSN: 2083-1862
ISSN: 0860-021X
Biology of Sport
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4/2022
vol. 39
 
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abstract:
Original paper

Effect of physical training on parathyroid hormone and bone turnover marker profile in relation to vitamin D supplementation in soccer players

Michał Brzeziański
1, 2
,
Monika Migdalska-Sęk
3
,
Michał Stuss
1
,
Zbigniew Jastrzębski
4
,
Łukasz Radzimiński
4
,
Ewa Brzeziańska-Lasota
3
,
Ewa Sewerynek
1

1.
Medical University of Lodz, Department of Endocrine Disorders and Bone Metabolism, 90-752 Lodz, Poland
2.
Medical University of Lodz, University Laboratory of Three-Dimensional Anthropometry, 92-213 Lodz, Poland
3.
Medical University of Lodz, Department of Biomedicine and Genetics, 92-213 Lodz, Poland
4.
Gdansk University of Physical Education and Sport, Department of Physiology and Biochemistry, 80-336 Gdansk, Poland
Biol Sport. 2022;39(4):921–932
Online publish date: 2021/11/10
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The aim of the study was to assess the impact of vitamin D supplementation and regular physical activity on 25-hydroxyvitamin D [25(OH)D], parathyroid hormone (PTH) and bone turnover marker concentrations in healthy male athletes. Twenty-five youth soccer players were divided into groups: non-supplemented (GN) and supplemented (GS) with a vitamin D dose of 20 000 IU twice a week for 8 weeks. The study was conducted during an 8-week preseason period, from mid-January to mid-March. At baseline (T1) and at the end of this period (T2), the serum concentrations of 25(OH)D, (PTH), osteocalcin (OC) and β-isomerized C-terminal telopeptide of type I collagen (β-CTx) were measured. At T2, 25(OH)D increased by 70% in GS (p = 0.004) and by 6% in GN (p > 0.05). Significant differences between GS and GN groups were observed throughout the study in the group-by-time interaction and changes of 25(OH)D (p = 0.002; η2p = 0.36) and OC (p = 0.008; η2p = 0.26). Increased OC (ES = 0.74; moderate) and β-CTx (ES = 1.31, large) in GN athletes who had an optimal baseline vitamin D level (GO) were observed. In GN, at T2, β-CTx positively correlated with PTH and OC (p = 0.007 and p = 0.002). In GS, β-CTx positively correlated with OC at both time points (T1, p = 0.027 and T2, p = 0.037). A negative correlation between 25(OH)D and PTH was observed at T2 (p = 0.018). The obtained results suggest that the 20 000 IU vitamin D3 dose applied twice a week for 8 weeks is effective for vitamin D compensation and sufficient to maintain the correct PTH concentration, as revealed by changes in the bone marker concentrations. In conclusion, the results suggest that the applied vitamin D supplementation dose in athletes leads to intensive bone remodelling and has protective effects on bone under intensive physical effort.
keywords:

soccer players, physical training, PTH, bone turnover markers, vitamin D3 supplementation, osteocalcin, CTx

 
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