A NEW APPROACH TO INTERPRETATION OF SALIVARY ALFA AMYLASE ACTIVITY CHANGES AS A STRESS INDICATOR by Lubomir Petrov, Albena Alexandrova, Evtim Lefterov

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THE LOW SERUM FERRITIN AS AN INDICATOR OF INADEQUATE NUTRITION IN INTERNATIONAL LEVEL FEMALE SWIMMERS by Lubomir Petrov, Mihail Kachaunov, Albena Alexandrova

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FUNCTIONAL CHARACTERISTICS OF SPECIALIZED CIRCUIT TRAINING FOR KARATE COMPETITORS by Albena Alexandrova, Radoslav Penov, Lubomir Petrov, Dilyana Zaykova

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NUTRITIONAL STATUS AND BODY COMPOSITION OF YOUNG ARTISTIC GYMNASTS FROM BULGARIA by Stefan Kolimechkov, Iliya Yanev, Iliya Kiuchukov, Lubomir Petrov, Albena Alexandrova, Dilyana Zaykova, Emil Stoimenov

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