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@ARTICLE{Bizjak:134877,
author = {D. A. Bizjak and D. Jacko and P. Zimmer$^*$ and S. Gehlert
and W. Bloch and M. Grau},
title = {{A}cute alterations in the hematological and
hemorheological profile induced by resistance training and
possible implication for microvascular functionality.},
journal = {Microvascular research},
volume = {118},
issn = {0026-2862},
address = {Orlando, Fla.},
publisher = {Academic Press},
reportid = {DKFZ-2018-00665},
pages = {137 - 143},
year = {2018},
abstract = {Depending on the exercise variables and training design,
resistance exercise can be applied to gain muscle mass,
prevent diseases like osteoporosis and sarcopenia or
generally increase strength capacity. But the influence on
blood flow parameters and possible consequences in health
and disease are less understood. To examine the possible
impact of resistance exercise of different duration on
hemorheology, oxidative stress and microvascular function,
participants (n = 6) performed lower-limb resistance
exercise of the quadriceps femoris. Loading consisted of 1
(S1), 5 (S5) and 10 (S10) sets, on separated days, at the
individual 10 repetition maximum. Blood samples were taken
before (Pre) and after (Post0) each set as well after a
25-min recovery period (Post25). Hemograms were measured to
analyze hematocrit, white blood cell (WBC) count and red
blood cell (RBC) count. RBC deformability and aggregation
were measured by ektacytometry and syllectometry to
determine hemorheological responses. Plasma and RBC nitrate
were measured by chemiluminescence detection to determine
nitric oxide production. Formation of N-tyrosine and plasma
malondialdehyde to determine oxidative stress and lipid
peroxidation were measured by immunostaining and ELISA,
respectively. Hematocrit, RBC, WBC count and aggregation
increased Post0 in each protocol with subsequently decreased
values Post25 below Pre values. High effect size was
observed regarding deformability during the different sets.
RBC nitrite analysis revealed effect size alterations
between the trainings, whereas plasma nitrite was not
affected. Effects size was evident in lipid peroxidation,
whereas N-tyrosine concentration was not altered. Lower-limb
resistance exercise induced acute changes in hematological
and hemorheological parameters, whereby intermittent
hemodilution and plasma shifts seemed the major contributor.
The acute adaptations of RBC function seen during short
duration resistance exercise might contribute to beneficial
effects on microvascular circulation with a low oxidative
stress response.},
cin = {G210},
ddc = {610},
cid = {I:(DE-He78)G210-20160331},
pnm = {317 - Translational cancer research (POF3-317)},
pid = {G:(DE-HGF)POF3-317},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29559378},
doi = {10.1016/j.mvr.2018.03.007},
url = {https://inrepo02.dkfz.de/record/134877},
}