A new approach to assessing maximal aerobic power in children: the Odense School Child Study

Abstract

In two experiments maximal aerobic power (VO2max) calculated from maximal mechanical power (Wmax) was evaluated in 39 children aged 9-11 years. A maximal multi-stage cycle ergometer exercise test was used with an increase in work load every 3 min. In the first experiment oxygen consumption was measured in 18 children during each of the prescribed work loads and a correction factor was calculated to estimate VO2max using the equation VO2max = 12.Wmax + 5.weight. An appropriate increase in work rate based on height was determined for boys (0.16 W.cm-1) and girls (0.15 W.cm-1) respectively. In the second experiment 21 children performed a maximal cycle ergometer exercise test twice. In addition to the procedure in the first experiment a similar exercise test was performed, but without measurement of oxygen uptake. Calculated VO2max correlated significantly (p less than 0.01) with those values measured in both boys (r = 0.90) and girls (r = 0.95) respectively, and the standard error of estimation for VO2max (calculated) on VO2max (measured) was less than 3.2%. Two expressions of relative work load (%VO2max and %Wmax) were established and found to be closely correlated. The relative work load in %VO2max could be predicted from the relative work load in %Wmax with an average standard error of 3.8%. The data demonstrate that calculated VO2max based on a maximal multi-stage exercise test provides an accurate and valid estimate of VO2max.

Markers of insulin resistance are associated with fatness and fitness in school-aged children: the European Youth Heart Study

“…Cardiorespiratory fitness Cardiorespiratory fitness was determined by a maximum cycle-ergometer test [18]. Briefly, the workload was pre-programmed on a computerised cycleergometer (Monark 829E; Ergomedic, Vansbro, Sweden) to increase every third minute until exhaustion.…”

Aerobic exercise capacity at long-term follow-up after paediatric allogeneic haematopoietic SCT

“…In addition, indicators of pulmonary limitation to exercise were calculated: the ventilatory reserve (VR) reflecting ventilatory capacity and the ventilatory equivalent for CO 2 (V eqCO 2 ) reflecting efficiency of ventilation. 3 We used age-and gender-specific reference values for VO 2peak derived from six Danish and Norwegian studies of healthy children and young adults, [15][16][17][18][19][20] which included measurements in a total of 1041 females and 1061 males across all ages of interest (6-24 years). The reference material was validated by testing 33 healthy subjects (17 males and 16 females) equally distributed in the age group 6-30 years with the same equipment and protocol as used in the patient population.…”

Associations of low-grade inflammation with physical activity, fitness and fatness in prepubertal children; the European Youth Heart Study

“…37 Briefly, the workload was preprogramed on a computerized cycle ergometer (Monark 829E Ergomedic, Vansbro, Sweden) to increase every third minute until exhaustion. Heart rate was registered continuously by Inflammation, fitness and fatness in children JR Ruiz et al telemetry (Polar Sport Tester, Kempele, Finland).…”

“…The 'Hansen formula' for calculated maximal oxygen consumption (VO 2max in ml/min) was 12 Â calculated power output þ 5 Â body weight (in kg). 37 CVF was expressed as VO 2max per kilogram of body mass (ml/kg/min) because of the homogeneity in stature, and obesity grade of the subjects, because it is well established, and for ease of comparison with the results of previous studies. The test used has been previously validated in children of the same age and is highly correlated in children with directly measured VO 2max (r ¼ 0.95 and 0.90 in girls and boys, respectively).…”

“…The test used has been previously validated in children of the same age and is highly correlated in children with directly measured VO 2max (r ¼ 0.95 and 0.90 in girls and boys, respectively). 37 …”