期刊名称：International Journal of Sport, Exercise and Training Sciences
电子版ISSN：2149-8229
出版年度：2017
卷号：3
语种：English
出版社：Balikesir University
摘要：The aim of this study was to examine the acute hematological changes after maximal isotonic eccentric (ECC) and concentric (CON) training at two velocities [fast,1800s-1 (3.14 rad s-1) and slow,300 s-1 (0.52 rad s-1)]. 41 untrained but physically active subjects aged 18-24 years volunteered to participate in this study. All participants were randomly divided as experimental groups;[(slow concentric group (SC;n=7),slow eccentric group (SE;n=7),fast concentric group (FC;n=7),fast eccentric group (FE;n=6),concentric-eccentric group (CE;n=7)]. Subjects applied knee extensors using a leg extension machine (Matrix,G3-S71,Italy) until they reached the level of exhaustion. The intensity of the training was determined by their one repetition maximum (1RM) values as referred previously. The participants were submitted to a blood sample to gather the hematological profile such as leukocytes(WBC),neutrophils(NEU),lymphocytes(LYMP) hemoglobin(HGB),hematocrit(HCT),platelets(PLT) and also erythrocytes (RBC). First blood samples were collected pre-training,then immediately after the final set,and it is repeated at 24 and 48 hours later. Repeated measures analysis of variance (rANOVA) was performed to compare the blood marker changes. At baseline,no difference was observed between groups(p>0.05). In the second,third and fourth measurements,there were significant increases compared to baseline values (p>0.05) for all parameters. Even though,we found parallel increases after the different types of resistance training on any of these markers,the all hematological response to the two slow resistance exercise protocols (SE and SC) in this study caused a significant acute increase between baseline and immediately after-exercise values (p< 0.05). The present study suggest that hematological parameters may be affected by slow contractions but further studies are needed to confirm these findings by increasing sample size.
