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 58
- Downloads 0
DELAYED URIC ACID ACCUMULATION IN PLASMA PROVIDES ADDITIONAL ANTIOXIDANT PROTECTION AGAINST IRON-TRIGGERED OXIDATIVE STRESS AFTER A WINGATE TEST
Reactive oxygen species are produced during anaerobic exercise mostly by Fe ions released into plasma and endothelial/muscle xanthine oxidase activation that generates uric acid (UA) as the endpoint metabolite. Paradoxic...
Comparison of posture among adolescent male volleyball players and non-athlete
Due to high training loads and frequently repeated unilateral exercises, several types of sports training can have an impact on the process of posture development in young athletes. The objective of the study was to asse...
Effect of training in minimalist footwear on oxygen consumption during walking and running
The present study sought to examine the effect of 5 weeks of training with minimalist footwear on oxygen consumption during walking and running. Thirteen college-aged students (male n=7, female n=6, age: 21.7±1.4 years ,...
Cardiovascular and thermoregulatory responses to treadmill running while wearing shirts with different fabric composition
Clothing must be worn in many athletic and occupational situations as part of a uniform or for protection from the environment, but clothing interferes with sweat evaporation and heat dissipation. Thus, the heat dissipat...
Effects of training status and different treadmill exercises on the activity of complement receptor type 1 of erythrocytes
The aims of this study were to investigate the effects of training status, different intensities, durations and modes of exercises on the activity of complement receptor type 1 (CR1) of erythrocytes. Fifteen sedentary ma...