STUDY ON IN BLOOD CHEMISTRY CHANGES INDUCED BY VARIOUS EXERTIONS IN MAŁE VOLLEYBALL PLAYER WHO SUFFERS FROM EPISODIC MUSCLE CRAMPS. A CASE STUDY
Journal Title: Medycyna Sportowa - Year 2009, Vol 25, Issue 3
Abstract
Background. Elitę małe volleyball player, who suffers from incidental muscle cramps was sub-jected to the study on changes selected blood parameters induced by three various exertions: labo-ratory graded exercise test, a typical training session and an international volleyball tournament. Materiał and methods. Blood was sampled prior and after each of three exertions undergone wi-thin 2-week period on a separated day in a order as follows: laboratory exercise (LE) of graded inten-sity until refusal (5 bouts x 3 minutes) on cycloergometer, training session (TS) lasting 2h, and offi-cial, 4-sets volleyball match (VM) of high standing, lasting 90 min. LE were performed within 10:00-12:00 am, TS and VM took place in the afternoon (17:30-19:00). Blood parameters detected in the samples were as follows: urea (U), glucose (GLU), hormones: cortisol (C), testosterone (T), T/C ratio, growth hormone (HGH), DHEA-S, enzymes: CK, GOT, GPT, electrolytes: Na*, K*, Mg*2, Ca*2, lactate (La) and post-exertion relative plasma volume changes. Results. LE brought about the higher rises of LA, HGH and T, while Glu, U and electrolytes re-mained unchanged. End-VM LA level was below 2.5 mmol/L and K* and Mg*2 dropped below Iower li-mits (3.5 and 0.5 mmol/L respectively), T/C x100 ratio decreased from 7.7 to 3.7, mainly due to mar-ked rise of C, set-to-set GLU fluctuated from 7.1 to 4.2 mmol/L and U was the highest (7.9 mmol/L). Conclusions. The magnitudes of end-VM changes in U, T/C ratio and K* and Mg*2 indicated the bio-logical cost of participation into VM as very high, but that does not elucidate history of muscle cramps.
Authors and Affiliations
Zbigniew Obmiński, Katarzyna Lerczak, Konrad Witek, Lech Borkowski, Janina Starczewska-Czapowska
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