Relationship between Anthropometric, Physical and Hormonal Parameters among Pre-Pubertal Handball Players
| Autor: | Alexandra Cselkó, Márk Váczi, Edina Szabo, Tamás Kőszegi, Márta Wilhelm, Éva Tékus |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
medicine.medical_specialty
Adolescent Health Toxicology and Mutagenesis cortisol sex hormones Article children Internal medicine medicine Aerobic exercise Humans Muscle Strength Child Testosterone Anthropometry Hand Strength business.industry Public Health Environmental and Occupational Health VO2 max Cardiorespiratory fitness Hand Respiratory quotient Endocrinology Athletes Medicine Female handball business strength Hamstring Hormone Sports |
| Zdroj: | International Journal of Environmental Research and Public Health Volume 18 Issue 19 International Journal of Environmental Research and Public Health, Vol 18, Iss 9977, p 9977 (2021) |
| ISSN: | 1660-4601 |
| DOI: | 10.3390/ijerph18199977 |
| Popis: | Background: The aims of our study were to investigate the changes in anthropometric and physical parameters and fasting hormonal levels among pre-pubertal female handball players (n = 14, age: 11.53 ± 0.58 yrs, height: 153.36 ± 5.12 cm, body mass: 43.59 ± 6.14 kg) in the pre-season period following 8 weeks of handball training, and to analyze the contribution of hormones, physical performance and anthropometric parameters. Methods: Prior to and immediately following the training period, several anthropometric, strength, and cardiorespiratory variables, including fasting hormonal concentrations (plasma cortisol, estradiol, testosterone and growth hormones) were measured. Athletes performed concurrent resistance and aerobic exercises, including game-based trainings during the 8-week training period. Results: Significant elevations were found in all strength parameters (maximal handgrip strength dominant (D): 16.40%, p < 0.01 non-dominant (ND): 25.15%, p < 0.05 maximal concentric (MVC) torque of quadriceps D: 13.82%, p < ND:12.61%, p < MVC torque of hamstring D:12.14%, p < ND: 12.44%, p < 0.01), including plasma cortisol levels (C, 34.30%, p < 0.05) and peak respiratory quotient (5.24%, p < 0.05). Body composition and maximal oxygen uptake (VO2max) remained unchanged. Percentage changes in thigh (r = 0.316, p < 0.05), hand (r = 0.361, p < 0.05), and hip circumference (r = 0.297, p < 0.05) correlated with C changes. Percentage changes in plasma growth hormone levels (GH) contributed to the magnitude of gains in handgrip strength (r = 0.553, p < 0.05). Percentage changes in maximal exercise pulmonary ventilation (MVE) correlated with elevated C (r = −0.592, p < 0.05). Discussion: Changes in anthropometric variables and fasting hormone levels (estradiol, testosterone and cortisol) were poor indicators of developing VO2max and strength during pre-pubertal years. Physical adaptation may not be explained in consideration of the athletes’ hormonal or anthropometric characteristics. Conclusion: Gradually increased training volume followed by a summer break should be applied to youth handball, considering the anti-hypertrophic responses and the inhibitory effect of elevating C on pre-pubertal maturation. |
| Databáze: | OpenAIRE |
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