Abstract des Autors

Adipose tissue of eighteen professional soccer players (age range 18-31 years) forced to immobilise for at least two months (60-98 days) following traumas of the lower limbs, was maintained constant through dietary modifications and weekly check-ups. At the end of the immobilisation period, the Body Mass Index (BMI) was lower (22(SD 1.1)) when compared to in-training values (23.1(1.1)), while the percent adipose tissue was similar. We measured levels of blood glucose, insulin and C-peptide and the molar ratio C-peptide/immunoreactive insulin (IRI) following oral glucose administered before and three months after training. Despite similar blood glucose levels and C-peptide/insulin ratio values a significant reduction in the mean levels of insulin and C-peptide was observed after resumption of sporting activity. Our results show that training, with the attendant increase in lean mass, reduces the levels of blood insulin required to maintain normoglycaemia through either a diminished insulin secretion by the beta-cell or increased insulin sensitivity. Verf.-Referat