The influence of aerobic and anaerobic characteristics of children of different age on achievement of VO2 plateau VL Kropej, B Škof, R Milić Biol Sport 2005; 22(1):67-79 ICID: 891555
Article type: Original article
IC™ Value: 10.26
Abstract provided by Publisher
VO2max is a measurement of the maximal rate at which energy can be derived from oxidative processes. The plateau criterion has been considered the most important criterion when defining a VO2max value. The purpose of this research was to compare subjects who achieve a plateau with those who do not and to determine which anthropometric and physiological factors and endurance performance influence the achievement of VO2 plateau, and to find, whether the two groups differ in gender and age. The sample comprised 27 children (age 11.8±2.0 yrs, weight 49.7±14.0 kg, height 159.7±14.0 cm), 14 of them were boys and 13 were girls. The children exhibited average VO2max values of 45.4±7.7 ml•min-1•kg-1 during the exercise. The criteria for achieving the plateau were respiratory exchange rate greater or equal 1.0, heart rate greater or equal 90% of predicted age-adjusted maximal heart rate and the change in VO2 in the last minute of exercise less or equal 2 ml•min-1•kg-1 with an increase in workload. 56% of children met all three criteria for achieving the plateau in VO2. Statistically significant differences between plateau achievers and non-achievers were found for gender, VO2max, velocity at VO2max, duration of the treadmill test, results on 2400 m and fat mass. In the other explanatory variables subjects showed no significant differences. This study demonstrates the plateau achievers are mostly girls, have worse results in tests of maximal aerobic power and endurance performance (velocity at VO2max, duration of the treadmill, 2400 m run) and have more fat mass than non-achievers.