Journal of Exercise Science & Fitness
Volume 8, Issue 1 , Pages 54-60, June 2010

Effects of Short-Term Resistance Training on Serum Leptin Levels in Obese Adolescents

  • Patrick W.C. Lau

      Affiliations

    • Department of Physical Education, Hong Kong Baptist University, HONG KONG
    • ,
  • Zhaowei Kong

      Affiliations

    • Faculty of Education, University of Macau, MACAU
    • ,
  • Choung-rak Choi

      Affiliations

    • Sports Management, Division of Sport Science, College of Natural Science, Konkuk University, KOREA
    • Corresponding Author InformationCorresponding Author Choung-rak Choi, Sports Management, Division of Sport Science, College of Natural Science, Konkuk University, Danwol-dong, Chungju-city, Chungbuk, KOREA
    • ,
  • Clare C.W. Yu

      Affiliations

    • Institute of Human Performance, University of Hong Kong, HONG KONG
    • ,
  • Dorothy F.Y. Chan

      Affiliations

    • Department of Pediatrics, The Chinese University of Hong Kong, HONG KONG
    • ,
  • Rita Y.T. Sung

      Affiliations

    • Department of Pediatrics, The Chinese University of Hong Kong, HONG KONG
    • ,
  • Beeto W.C. Leung

      Affiliations

    • Department of Psychology, University of Hong Kong, HONG KONG

Article Outline

The purpose of this study was to examine the effects of a short-term resistance training program on serum leptin concentrations in obese adolescents. Eighteen Chinese obese adolescents participated in the supervised weight management program. Resistance training was conducted three times a week on alternate days for 6 weeks. Body composition [body fat mass (FM) and body lean mass (LM)] determined by dual-energy X-ray absorptiometry, muscle strength and leptin, insulin and glucose were measured before and after training. Subjects demonstrated significantly improved strength of leg, chest and bicep under conditions of stability in weight, FM and LM. There were positive correlations between leptin and body mass index, FM, %FM, waist girth and hip girth, and negative correlations between leptin and %L M at the resting state before and after 6 weeks of resistance training. No significant relationship was found between leptin concentration and the parameters of muscular strength or concentrations of insulin and glucose. Compared to pre-training values, serum leptin levels were not significantly altered, while relative leptin (leptin/FM) decreased significantly after the short-term resistance training. These results indicate that short-term resistance training enhances muscle strength but does not alter leptin levels in obese adolescents with weight and FM stability. The results also suggest that 6 weeks of resistance training decreases the requirement of leptin per unit of FM and improves leptin sensitivity in obese adolescents.

Keywords:  adolescent obesity , leptin , resistance training

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PII: S1728-869X(10)60008-1

doi:10.1016/S1728-869X(10)60008-1

Journal of Exercise Science & Fitness
Volume 8, Issue 1 , Pages 54-60, June 2010

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