title: Respiratory compensation point during incremental test in overweight and normoweight boys: is it useful in assessing aerobic performance? A longitudinal study.
abstract: The purpose of this study was to investigate the characteristics of the respiratory compensation point (RCP) in overweight and normoweight boys and to clarify changes in the RCP over 4 years. This study was conducted with 11 overweight boys and 14 boys with normal weight. The boys performed the graded test every 2 years (three series) beginning at the age of 9-10 years and finishing at the age of 13-14 years. During the test, the RCP was detected. In every series, the RCP occurred earlier in the overweight boys than in the normoweight boys and at a significantly (P<0·05) lower rate relative to body mass power output (P kg(-1) ). Relative oxygen uptake (VO2  kg(-1) ) at the RCP in all studies was also significantly (P<0·05) lower in the group of overweight boys. The maximum level of analysed indicators (VO2 max; Pmax) differentiated both groups in similar ways as their level noted at RCP. This study showed significant (P<0·05) correlation between the values VO2 max kg(-1) and VO2  kg(-1) at RCP in each series of the test and between Pmax kg(-1) and P kg(-1) at RCP. The respiratory compensation point seems to be a good method for evaluating aerobic performance in children (also overweight). During puberty, a decreasing tendency in aerobic performance was observed in both groups.
authors.affiliation: Institute of Biomedical Sciences, University School of Physical Education in Krakow, Krakow, Poland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Maciejczyk
authors.forename: Jadwiga
authors.initials: J
authors.lastname: Szymura
authors.forename: Jerzy
authors.initials: J
authors.lastname: Cempla
authors.forename: Joanna
authors.initials: J
authors.lastname: Gradek
authors.forename: Magdalena
authors.initials: M
authors.lastname: Więcek
authors.forename: Marek
authors.initials: M
authors.lastname: Bawelski
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001835:Body Weight; D016022:Case-Control Studies; D002648:Child; D005080:Exercise Test; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D053580:Muscle Strength; D050177:Overweight / Q000175:diagnosis* / Q000503:physiopathology; D010101:Oxygen Consumption; D011237:Predictive Value of Tests; D012016:Reference Values; D012119:Respiration; D012737:Sex Factors
keywords: body composition; children; obesity; oxygen uptake; ventilatory threshold