Muscle metabolism and enzyme activities after training in boys 11-13 years old.

Adenosine Triphosphatases/metabolism Adenosine Triphosphate/metabolism Adolescent Biopsy, Needle Child Creatine/metabolism Glucose/metabolism Glycogen/metabolism Heart Rate Humans Lactates/blood,metabolism Male Muscles/anatomy & histology,enzymology,metabolism Oxygen Consumption Phosphofructokinase-1/metabolism Physical Exertion Pyruvates/metabolism RNA/metabolism Spirometry Sports Succinate Dehydrogenase/metabolism Testis/anatomy & histology

Lactates Pyruvates RNA Adenosine Triphosphate Glycogen Succinate Dehydrogenase Phosphofructokinase-1 Adenosine Triphosphatases Glucose Creatine