The GH-IGF-I response to typical field sports practices in adolescent athletes: a summary.
The present study compares previous reports on the effect of "real-life" typical field individual (i.e., cross-country running and wrestling--representing combat versus noncombat sports) and team sports (i.e., volleyball and water polo-representing water and land team sports) training on GH and IGF-1, the main growth factors of the GH→IGF axis, in male and female late pubertal athletes. Cross-country running practice and volleyball practice in both males and females were associated with significant increases of circulating GH levels, while none of the practices led to a significant increase in IGF-I levels. The magnitude (percent change) of the GH response to the different practices was determined mainly by preexercise GH levels. There was no difference in the training-associated GH response between individual and team sports practices. The GH response to the different typical practices was not influenced by the practice-associated lactate change. Further studies are needed to better understand the effect of real-life typical training in prepubertal and adolescent athletes and their role in exercise adaptations.
Child Health & Sport Center, Pediatric Dept., Meir Medical Center, Tel-Aviv University, Kfar Saba, Israel.
Alon
A
Eliakim
Dan M
DM
Cooper
Dan
D
Nemet
D000222:Adaptation, Physiological; D000293:Adolescent; D005260:Female; D013006:Growth Hormone / Q000097:blood*; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000032:analysis*; D019344:Lactic Acid / Q000097:blood; D008297:Male; D010806:Physical Education and Training; D005082:Physical Exertion / Q000502:physiology; D013177:Sports / Q000502:physiology*
D019344:Lactic Acid; D007334:Insulin-Like Growth Factor I; D013006:Growth Hormone