Journal of Sports Science and Medicine
Journal of Sports Science and Medicine
ISSN: 1303 - 2968   
Ios-APP Journal of Sports Science and Medicine
Androit-APP Journal of Sports Science and Medicine
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©Journal of Sports Science and Medicine (2008) 07, 437 - 445

Research article
Impact of diet, exercise end diet combined with exercise programs on plasma lipoprotein and adiponectin levels in obese girls
Omar Ben Ounis1, , Mohamed Elloumi1, Mohamed Amri3, Abdelkarim Zbidi1, Zouhair Tabka1, Gerard Lac2
Author Information
1 Laboratory of Physiology, Faculty of Medicine, Sousse, Tunisia
2 Laboratory of Exercise Biology, University Blaise Pascal, Clermont-Ferrand, France
3 Laboratory of Physiology, Faculty of Sciences, Tunis, Tunisia

Omar Ben Ounis
✉ Laboratory of Physiology, Faculty of Medicine, Sousse, Tunisia.
Email: omar_oda@yahoo.fr
Publish Date
Received: 12-05-2008
Accepted: 04-07-2008
Published (online): 01-12-2008
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ABSTRACT

We studied the effect of three programs, diet restriction (D), individualized exercise training (E) at the maximal lipid oxidation point (LIPOXmax) and diet combined with exercise (D+E), on body mass, plasma lipoprotein and adiponectin levels in obese girls. Eighteen obese adolescents girls aged 12-14 years were studied. A longitudinal intervention was carried out, consisting of a two-month diet (D; -500 kcal·day-1), of individualized exercise (E; 4 days/week, 90 min·day-1) and of diet combined with exercise (D+E). Body mass, body mass index (BMI), body fat mass, waist circumference, substrate crossover point, LIPOXmax point, homeostasis model assessment (HOMA-IR) index, fasting levels of lipids and circulatory adiponectin, were measured in all subjects before and after the program. In subjects of the D+E group, body mass, BMI, body fat mass, waist circumference, HOMA-IR, low-density lipoprotein cholesterol (LDL-C) and total cholesterol / high-density lipoprotein cholesterol (TC/HDL-C) ratio were significantly lower, and HDL-C and adiponectin were higher after the program than that of subjects in the D or E groups. Diet/exercise improved the ability to oxidize lipids during exercise (crossover point: + 18.5 ± 3.4 of % Wmax; p < 0.01 and fat oxidation rate at LIPOXmax: + 89.7 ± 19.7 mg·min-1; p < 0.01). In the D+E group, significant correlations were found between changes in body mass and adiponectin and between changes in the TC/HDL-C ratio and LIPOXmax. These findings show that the combined program of diet restriction and individualized exercise training at the LIPOXmax point is necessary to simultaneously improve body mass loss, adiponectin levels, as well as metabolic parameters, in obese girls.

Key words: Obese girls, lipoprotein, adiponectin, exercise training, diet restriction


           Key Points
  • Diet combined with exercise training improved body composition, adiponectin levels and metabolic parameters in obese girls.
  • Diet only decreases body mass and LDL-C without improving fat oxidation and HDL- C.
  • Individualized exercise training at LIPOXmax point improved the HDL-C and the circulatory adiponectin levels with any change of LDL-C and body composition.
 
 
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