Abstract

The aim of this study was to investigate the effects of extensive endurance training (15-25 h per week) on the development of maximal oxygen uptake (VO2max) in boys from puberty. Maximal oxygen uptake was measured a number of times each year from the age of puberty and for the next 6-9 years in seven young male elite cross-country skiers. Mean VO2max was measured as 76.3 and 80.1 ml/kg/min at the ages of 14 and 15 years respectively. Despite the fast rate of growth during puberty, maximal aerobic power showed seasonal variations from the age of 14, reaching a plateau at the age of 15, whereas VO2max increased continuously. It is concluded that, during puberty, boys probably attain significant increases in VO2max when appropriate amounts of endurance training are undertaken. Verf.-Referat