The Influence of Maturation on the Oxygen Uptake Efficiency Slope

Abstract

This study examined the influence of maturation on the oxygen uptake efficiency slope (OUES) in healthy male subjects. Seventy-six healthy male subjects (8–27 yr) were divided into groups based on maturation status: prepubertal (PP), midpubertal (MP), late-pubertal (LP), and young-adult (YA) males. Puberty status was determined by physical examination. Subjects performed a graded exercise test on a cycle ergometer to determine OUES. Group differences were assessed using a one-way ANOVA. OUES values (VO2L·min1/log10VEL·min−1) were lower in PP and MP compared with LP and YA (p < .05). When OUES was expressed relative to body mass (VO2mL·kg−1·min−1/log10VEmL·kg−1·min−1) differences between groups reversed whereby PP and MP had higher mass relative OUES values compared with LP and YA (p < .05). Adjusting OUES by measures of body mass failed to eliminate differences across maturational groups. This suggests that qualitative factors, perhaps related to oxidative metabolism, account for the responses observed in this study.

Unit of oxygen uptake efficiency slope

“…The units L/min/log(L/min) [25][26][27][28][29][30][31] , L/min/logL [32][33][34][35] and L/ min/logVE 36) are not logical, because logarithm is not included in the unit.…”

“…The OUES has been applied to evaluate cardiorespiratory fitness in patients with various diseases as well as in healthy individuals 1,3,4,9,11,15,17, [24][25][26][32][33][34][35]37,44) ; these various diseases include heart diseases 1,4,6,8,9,12-16,18, 21,28,29,33,38,[40][41][42][43][44]46) , orthopedic surgery 5) , gastroenterological surgery 7) , intellectually disabled young people 10) , multiple sclerosis 17, 23,33,39,45) , chronic obstructive pulmonary disease 15,27,33,45) , pulmonary arterial hypertension 19,20,30,36) , lung cancer 22) , severely overweight people 31,32) and cystic fibrosis 34,35) . Despite the high concern regarding the value of OUES, its unit is still unsettled.…”

The role of biological maturation intervention and anthropometric factors on cardiac reserve index (OUES) in Iranian teenage boys

“…And this was the only available study which investigated the effect of maturity on OUES of children. 10 Also Akkerman et al 16 in 2010 on healthy children of 7---17 years old showed a high correlation of R = 0.95 in both indices OUES and VO 2max . But significant difference in the OUES index when performing two patterns of standard exhaustive and submaximal physical labor was not found and this was found that OUES is affected by anthropometric variables and thus it was suggested that OUES must be corrected by the intervention factors of BSA or FFM.…”

“…In this regard, Rogowski et al, 10 study in 2012 on the effects of biological maturation on OUES index of 8---27 year olds revealed that the index is influenced by the maturity meaning those who are not yet mature, have OUES lower than their adult peers. But when OUES is normalized and corrected in terms of body weight, the difference is reversed.…”

“…In this direction, scientific reports introduce new criterion for measuring oxygen transfer performance called OUES or (slope between oxygen uptake and minute ventilation) in cardiorespiratory performance measurement, stronger and very accurate than VO 2max . 10 OUES is a new index for evaluating the oxygen transfer system developed in 1996 by Japanese Dr Baba et al 11 and became interesting for biological science researchers. 11---13 So that in 2010 Akkerman et al…”