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Title: Obesity and catecholamine responses to maximal exercise in adolescent girls
Authors: Zouhal, Hassane
Jabbour, George
Youssef, Hala
Moussa, Elie 
Jacob, Christophe 
Affiliations: Department of Physical Education 
Department of Physical Education 
Keywords: Overweight
Maximal oxygen uptake
Subjects: Adolescence
Issue Date: 2010
Part of: European journal of applied physiology
Volume: 110
Issue: 2
Start page: 247
End page: 254
The aim of this study was to investigate plasma catecholamine [adrenaline (A) and noradrenaline (NA)] concentrations at rest and in response to maximal exercise in three different groups of adolescent girls. According to their body mass index, 34 adolescent girls aged 15–16 years were divided into three groups: a normal weight group (NO) (n = 11), an overweight group (OW) (n = 11) and an obese group (OB) (n = 12). Plasma A and NA concentrations were measured at rest during fasting conditions (A 0 and NA0), after a standardized breakfast (A rest and NArest) and immediately after an incremental exhaustive exercise (A EX and NAEX). A 0 and NA0 were not significantly different among the three groups. However, the A 0/NA0 was statistically lower in OB compared to OW and NO. A EX and NAEX were significantly higher than resting values in the three groups. However, in response to exercise, no significant differences were reported between OB (A EX = 2.20 ± 0.13 nmol/l, NAEX = 12.28 ± 0.64 nmol/l), OW (A EX = 2.39 ± 0.23 nmol/l, NAEX = 12.94 ± 0.93 nmol/l) and NO (A EX = 2.52 ± 0.24 nmol/l, NAEX = 12.60 ± 0.63 nmol/l). In conclusion, our results showed that at rest, in adolescent girls, the responsiveness of the adrenal medulla to the sympathetic nervous activity is lower in OB subjects compared to OW and NO ones. However, in response to maximal exercise, plasma catecholamines are not affected by obesity.
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Physical Education

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