Int J Sports Med 2013; 34(09): 795-799
DOI: 10.1055/s-0033-1333696
Physiology & Biochemistry
© Georg Thieme Verlag KG Stuttgart · New York

Release of ANP and Fat Oxidation in Overweight Persons during Aerobic Exercise in Water

M. Fenzl
1   Medizinisches Zentrum, Swiss Olympic Medical Center, Bad Ragaz, Switzerland
,
W. Schnizer
3   Munich, Germany
,
N. Aebli
2   Spinal Surgery and Orthopaedics, Swiss Paraplegic Centre, Nottwil, Switzerland
,
C. Schlegel
1   Medizinisches Zentrum, Swiss Olympic Medical Center, Bad Ragaz, Switzerland
,
B. Villiger
1   Medizinisches Zentrum, Swiss Olympic Medical Center, Bad Ragaz, Switzerland
,
A. Disch
1   Medizinisches Zentrum, Swiss Olympic Medical Center, Bad Ragaz, Switzerland
,
J. Gredig
1   Medizinisches Zentrum, Swiss Olympic Medical Center, Bad Ragaz, Switzerland
,
T. Zaugg
1   Medizinisches Zentrum, Swiss Olympic Medical Center, Bad Ragaz, Switzerland
,
J. Krebs
2   Spinal Surgery and Orthopaedics, Swiss Paraplegic Centre, Nottwil, Switzerland
› Author Affiliations
Further Information

Publication History



accepted after revision 15 December 2012

Publication Date:
27 February 2013 (online)

Abstract

Exercise in water compared to land-based exercise (LE) results in a higher release of natriuretic peptides, which are involved in the regulation of exercise-induced adipose tissue lipolysis. The present study was performed to compare the release of atrial natriuretic peptide (ANP) and free fatty acids (FFA) during prolonged aerobic water-based exercise (WE) with the release after an identical LE. 14 untrained overweight subjects performed 2 steady state workload tests on the same ergometer in water and on land. Before and after exercise, venous blood samples were collected for measuring ANP, FFA, epinephrine, norepinephrine, insulin and glucose. The respiratory exchange ratio (RER) was determined for fat oxidation.

The exercises resulted in a significant increase in ANP in LE (61%) and in WE (177%), and FFA increased about 3-fold in LE and WE with no significant difference between the groups. Epinephrine increased, while insulin decreased similarly in both groups. The RER values decreased during the exercises, but there was no significant difference between LE and WE. In conclusion, the higher ANP concentrations in WE had no additional effect on lipid mobilization, FFA release and fat oxidation. Moderate-intensity exercises in water offer no benefit regarding adipose tissue lipolysis in comparison to LE.

 
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