A HIGH LEVEL OF VOLLEYBALL PRACTICE ENHANCES BONE FORMATION MARKERS AND HORMONES IN PREPUBESCENT BOYS
Journal Title: Biology of Sport - Year 2012, Vol 29, Issue 4
Abstract
Objectives: To examine the effects of volleyball on hormones and biochemical markers before puberty. Methods: 130 prepubescent white boys were investigated in this study. 80 prepubescent volleyball players were divided into two groups according to the duration of training: 40 (age: 11.5 ± 0.6 years), representing the high-level training group (HLG), completed 6 to 8 hours of training/week; 40 (age: 11.2 ± 0.7 years), representing the low-level training group (LLG), completed 3 to 5 hours of training/week. The other 50 non-athletic boys (age: 11.3 ± 0.2 years) were used as control subjects (C). Results: Serum concentration of growth hormone (GH), insulin-like growth factor 1 (IGF-1) and carrier protein 3 (IGFBP-3), cortisol, bone formation markers (osteocalcin [OC] and bone alkaline phosphatase [BAP], and a bone resorption marker (cross-linked C-terminal telopeptide of type I collagen [CTX] were measured. No difference in CTX was observed among the three groups. However, the HLG presented higher levels of bone formation markers (OC, BAP) compared to controls. Hormonal concentrations of GH, IGF-1, IGFBP-3, and cortisol were higher in HLG than in controls. Conclusion: Volleyball did not lead to enhanced bone turnover markers and anabolic hormones of bone after a low-training level when compared to controls. Indeed, a high-training level induces enhanced bone formation markers and basal concentration of anabolic (GH, IGF-1, and IGFBP-3) and catabolic (cortisol) hormones of bone metabolism. Therefore, basal hormone concentrations and bone formation markers were directly related to the intensity and the duration of the training level.
Authors and Affiliations
Hamada Chaari, Mohamed Zouch, Myriam Denguezli, Ilyes Bouajina, Monia Zaouali, Zouhair Tabka
Keywords
Related Articles
- EP ID EP59129
- DOI -
- Views 77
- Downloads 0
Exercise session promotes antioxidant changes in Brazilian soccer players
Daily physical exercise routine of professional athletes improves physiological functions and performance. However, it also promotes alterations in the antioxidant capacity to combat the augmented oxygen consumption and,...
<strong><em>ACTN3 </em>GENOTYPE IS </strong><strong>ASSOCIATED WITH TESTOSTERONE LEVELS OF ATHLETES</strong>
α-Actinin-3 (ACTN3) has been proposed to regulate skeletal muscle differentiation and hypertrophy through its interaction with the signalling protein calcineurin. Since the inhibition of calcineurin potentiates the produ...
Effect of the sauna-induced thermal stimuli of various intensity on the thermal and hormonal metabolism in women
The aim of the present study was to compare basic physiological, biochemical, and hormonal reactions in women who prior to the study had never had a sauna and who were subjected to a single or multiple (i.e., applied rep...
INTRA- AND INTERRATER RELIABILITY OF MORPHOLOGICALLY EVALUATED LYMPHOCYTE APOPTOSIS IN TRAINED AND UNTRAINED OBSERVERS
Exercise-induced lymphocyte apoptosis has been reported using biochemical analysis and morphological assessment. Morphological evaluation is limited by the subjective nature of the technique. This investigation evaluated...
SELF-RATED PHYSICAL ACTIVITY LEVEL ACROSS EUROPE – POLAND AND OTHER EUROPEAN COUNTRIES
Physical inactivity has become a serious public health problem as it contributes to major non-communicable diseases. Increasing activity levels has beneficial effects on musculoskeletal health and mental health as well....