Serum free testosterone, leptin and soluble leptin receptor changes in a 6-week strength-training programme

Strength training is usually associated with a reduction in fat mass and with muscle hypertrophy. The aim of the present study was to examine whether the serum free leptin index (FLI), measured by the molar excess of soluble leptin receptor (sOB-R) over leptin, is increased by 6 weeks of strength tr...

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Bibliographic Details
Published in:British journal of nutrition 2006-12, Vol.96 (6), p.1053-1059
Main Authors: Ara, I., Perez-Gomez, J., Vicente-Rodriguez, G., Chavarren, J., Dorado, C., Calbet, J. A. L.
Format: Article
Language:English
Subjects:
Absorptiometry, Photon
Adiposity
Adult
adults
Analysis of Variance
Biological and medical sciences
blood chemistry
body composition
body fat
duration
Exercise
Feeding. Feeding behavior
Free leptin index
Fundamental and applied biological sciences. Psychology
hormone receptors
Humans
lean body mass
leptin
Leptin - blood
Male
men
Muscle Strength
Obesity
Physical Education and Training
physical fitness
Receptors, Cell Surface - blood
Receptors, Leptin
strength training
testosterone
Testosterone - blood
Time Factors
Vertebrates: anatomy and physiology, studies on body, several organs or systems
Weight Loss
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Summary:Strength training is usually associated with a reduction in fat mass and with muscle hypertrophy. The aim of the present study was to examine whether the serum free leptin index (FLI), measured by the molar excess of soluble leptin receptor (sOB-R) over leptin, is increased by 6 weeks of strength training. Eighteen male, physical education students were randomly assigned to two groups: a strength-training (n 12) and a control group (n 6). Body composition (lean body mass and body fat) determined by dual-energy X-ray absorptiometry (DXA), muscle performance and leptin, sOB-R, total testosterone and free testosterone concentrations were determined before and after training. Fat mass was reduced by 1 kg with strength training (P 
ISSN:0007-1145
1475-2662
DOI:10.1017/BJN20061956