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ORIGINAL ARTICLE  BODY COMPOSITION, NUTRITION AND SUPPLEMENTATION 

The Journal of Sports Medicine and Physical Fitness 2018 July-August;58(7-8):1045-51

DOI: 10.23736/S0022-4707.17.07370-4

Copyright © 2017 EDIZIONI MINERVA MEDICA

language: English

Reduced leptin level is independent of fat mass changes and hunger scores from high-intensity intermittent plus strength training

Daniela S. INOUE 1 , Valéria L. PANISSA 2, Barbara M. ANTUNES 1, Flaviane P. OLIVEIRA 1, Raoni B. MALTA 1, Renan S. CALDEIRA 1, Eduardo Z. CAMPOS 3, Gustavo D. PIMENTEL 4, Emerson FRANCHINI 2, Fábio S. LIRA 1

1 Exercise and Immunometabolism Research Group, Department of Physical Education, School of Technology and Sciences, State University (Unesp), Presidente Prudente, São Paulo, Brazil; 2 Department of Sport, School of Physical Education and Sport, University of São Paulo, São Paulo, Brazil; 3 Department of Physical Education, Federal University of Pernambuco, Pernambuco, Brazil; 4 Clinical and Sports Nutrition Research Laboratory (Labince), Nutrition Faculty (FANUT) - Federal University of Goiás (UFG), Goiânia, Brazil


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BACKGROUND: This study aimed to analyze the effects of high-intensity intermittent training (HIIT) plus strength training on body composition, hormone related to energy balance (leptin), and hunger scores in physically active non-obese men.
METHODS: Sixteen men were allocated in two different groups, training group (N.=10) performed a combined HIIT (5 km, 1 minute of effort interspersed by 1 minute of rest in passive recovery) followed by strength exercise session (three sets, with load of 8-12 repetition maximum) twice a week, during 8 weeks, while control group (N.=6) did not suffer any intervention. Hunger scores, leptin concentrations and body composition were assessed. Body composition, fasting leptin and hunger score were compared through two-way analysis (group and period) with repeated measures in the second factor while leptin and hunger scores in exercise session pre- and post-8 weeks through two-way analysis (period and time of measurement) with repeated measures in the second factor.
RESULTS: The fasting leptin decreased pre- to post-8week in training group (7.7±4.9 to 2.9±2.1 ng/mL; P=0.012). For leptin response to exercise session there was main effect of training period, with higher values pre- (6.5±3.9 ng/mL) than post-training (2.6±2.1 ng/mL; P<0.001). For hunger scores there was effect of time of measurement (P<0.001), decreasing after breakfast and increasing over the experiment.
CONCLUSIONS: Combined HIIT plus strength training were able to promote alterations in a hormone related to energy balance independent of body composition and hunger index alterations in physically active non-obese men.


KEY WORDS: Leptin - Body composition - High-intensity interval training - Energy metabolism - Exercise

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