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    NázovDiurnal variation in red blood cell variables in athletes after single and repeated bouts of exercise
    Aut.údajeRoman Alebrty ... [et al.]
    Autor Alberty Roman 1956- (50%) UMBFP09 - Katedra biológie a ekológie
    Spoluautori Pupiš Martin 1978- (30%) UMBFF09 - Katedra telesnej výchovy a športu
    Vachalík Vladimír (10%)
    Bátovský Miloš (10%)
    Zdroj.dok. The Journal of Sports Medicine and Physical Fitness. Vol. 61, no. 2 (2021), pp. 269-279. - Torino : Edizioni Minerva Medica, 2021
    Kľúč.slová športovci - sportsmen   krvinky - blood cells  
    Form.deskr.články - journal articles
    Jazyk dok.angličtina
    KrajinaTaliansko
    AnotáciaBACKGROUND: The aim of this study was to examine the diurnal and exercise-related changes in red blood cell variables which serve as indirect markers of doping in sports. METHODS: Ten men and 7 women, all undoped highly trained endurance athletes aged 19-34 years, were included in the study. Before and on the day with single and repeated bouts of exercise, blood samples were collected at 07:00, 09:00, 13:00, 18:00, and 21:00, at least 2 hours after exercise. Hemoglobin (Hb), hematocrit (Hct), and the reticulocytes % (Ret%) were determined by flow cytometry. Changes in OFF-hr score were also calculated and repeated-measures ANOVA was used to compare diurnal differences. RESULTS: In overall, the mean Hb decreased continuously by 4.5 and 3.3% (all P<0.001) over the day with single and repeated bouts of exercise, respectively. Corresponding values for the decline in Hct were 4.2 and 5.9% (all P<0.001). In contrast, the Ret% showed no apparent diurnal rhythm but single and repeated bouts of exercise increased the relative Ret% in the evening by 12.4 and 16.7% (P<0.01), respectively. Then the calculated OFF-hr score was reduced by 6.2 and 9.8% (all P<0.01) at the end of the day. CONCLUSIONS: These results confirmed the normal diurnal pattern in the examined red blood cell variables in response to exercise in highly trained athletes. Furthermore, they showed noticeable between-subject variability and the possible risk of a false suspicion of blood doping in undoped athletes after repeated bouts of exercise.
    URLLink na plný text Link do databázy WoS
    Kategória publikačnej činnosti ADC
    Číslo archívnej kópie49640
    Katal.org.BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici
    Báza dátxpca - PUBLIKAČNÁ ČINNOSŤ
    OdkazyPERIODIKÁ-Súborný záznam periodika
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