Are 10 min of seating enough to guarantee stable haemoglobin and haematocrit readings for the athlete's biological passport?

Détails

ID Serval
serval:BIB_93A2C9548B63
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Are 10 min of seating enough to guarantee stable haemoglobin and haematocrit readings for the athlete's biological passport?
Périodique
International Journal of Laboratory Hematology
Auteur(s)
Ahlgrim C., Pottgiesser T., Robinson N., Sottas P.E., Ruecker G., Schumacher Y.O.
ISSN
1751-553X[electronic], 1751-5521[linking]
Statut éditorial
Publié
Date de publication
2010
Volume
32
Numéro
5
Pages
506-511
Langue
anglais
Résumé
Haemoglobin (Hb) and haematocrit (Hct) are measured as indirect markers of doping in athletes. We studied the effect of posture on these parameters in a typical antidoping setting. Venous blood samples were obtained from nine endurance athletes (six males, three females) and nine control subjects (six males, three females) immediately and after 5, 10, 15, 20 and 30 min after having adopted a seated position from normal daily activity. Hb (CV 0.72%) and Hct (CV 0.87%) were determined using an automated cell counter, plasma volume changes were calculated. Differences between the time points, gender and groups were calculated using a mixed-model procedure. Significant changes were observed in the first 10 min after sitting down but no further changes were noted between 10 and 30 min. Mean directional change for Hb and Hct between 0 min and the average of the period from 10 to 30 min was -2.4% (-0.35 g/dl) for Hb and -2.7% (-1.2%) for Hct. Plasma volume increased accordingly. Neither group nor gender had significant effects. Under typical conditions encountered during blood testing in doping control, a period of 10 min in a seated position is sufficient for the vascular volumes to re-equilibrate and to adapt to the new posture.
Mots-clé
Adult, Athletes, Blood Specimen Collection/standards, Doping in Sports, Female, Hematocrit, Hemoglobins/analysis, Humans, Male, Plasma Volume, Posture
Pubmed
Web of science
Création de la notice
11/03/2011 17:02
Dernière modification de la notice
03/03/2018 19:35
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