en ورزش، تمرین و سلامتی Exercise, Training and Health مقاله اصیل Original Article <div style="text-align: justify;"><strong>Background. </strong>In weight-category sports, athletes regularly undertake weight-loss diets as competitions approach to lose weight quickly.<br> <strong>Objectives. </strong>This study aimed to evaluate the effects of dietary restriction on body composition and physical performance in young elite karatekas.<br> <strong>Methods.</strong> In a randomized design, 16 young karatekas volunteers (aged 20.14 &plusmn; 1.52 years) participated in this study, subdivided into two periods of 7 days each&mdash;one period of weight maintenance and one of food restriction. After anthropometric measurements, field tests aimed at assessing speed and acceleration, explosive power (counter-movement and triple standing jump), agility (T-tests), and aerobic endurance (intermittent yo-yo test 2) were performed. A 7-day food diary for each period (without and with food restriction) was used to determine nutritional intake.<br> <strong>Results. </strong>A significant decrease in body mass (p <0.05) was observed after the restriction period. A reduction in jumping power (p = 0.03), as well as a decrease in endurance capacity (p < 0.01), was observed. However, the agility test showed non-significant differences.<br> <strong>Conclusion.</strong> Based on these results, caloric restriction for rapid weight loss impairs athletes&rsquo; physical capacity and sports performance. Preventive measures against this phenomenon are necessary.</div> Karate, Physical Abilities, Tests, Diet, Rapid Weight Loss 0 0 http://aassjournal.com/browse.php?a_code=A-11-1970-1&slc_lang=en&sid=1 Simplice Innocent Moussouami simplicemoussouami@gmail.com 100319475328460013061 100319475328460013061 Yes Sport, Health, and Evaluation Research Unit (UR/SSE), National Institute for Youth, Physical Education, and Sport (INJEPS), University of Abomey-Calavi (UAC), Porto-Novo, Benin. Laboratory of Physiology of Effort and Biomechanics (LPB), Higher Institute of Physical Education and Sport (ISEPS), Marien Ngouabi University, Brazzaville, Congo Yvon Rock Ghislain Alongo 100319475328460013062 100319475328460013062 No Laboratory of Physiology of Effort and Biomechanics (LPB), Higher Institute of Physical Education and Sport (ISEPS), Marien Ngouabi University, Brazzaville, Congo Jean Paul Kouassi 100319475328460013063 100319475328460013063 No Sport, Health, and Evaluation Research Unit (UR/SSE), National Institute for Youth, Physical Education, and Sport (INJEPS), University of Abomey-Calavi (UAC), Porto-Novo, Benin Clive Mabika Nzoumba 100319475328460013064 100319475328460013064 No Laboratory of Physiology of Effort and Biomechanics (LPB), Higher Institute of Physical Education and Sport (ISEPS), Marien Ngouabi University, Brazzaville, Congo Issiako Bio Nigan 100319475328460013065 100319475328460013065 No Sport, Health, and Evaluation Research Unit (UR/SSE), National Institute for Youth, Physical Education, and Sport (INJEPS), University of Abomey-Calavi (UAC), Porto-Novo, Benin