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JOURNAL
OF
SPORTS SCIENCE &
MEDICINE
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Research
article
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IMPACT OF DIET, EXERCISE AND DIET COMBINED WITH EXERCISE PROGRAMS ON PLASMA LIPOPROTEIN AND ADIPONECTIN LEVELS IN OBESE GIRLS |
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Omar Ben Ounis1  ,
Mohamed Elloumi1, Mohamed Amri3, Abdelkarim Zbidi1, Zouhair Tabka1 and Gerard
Lac2 |
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1Laboratory of Physiology, Faculty of Medicine, Sousse, Tunisia, 2Laboratory of Exercise Biology, University Blaise Pascal, Clermont-Ferrand, France, 3Laboratory of Physiology, Faculty of Sciences, Tunis, Tunisia |
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© Journal of Sports Science and Medicine (2008) 7, 437 - 445 Search Google Scholar for Citing Articles |
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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. |
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