title: The effects of exercise in water at 4°C and 25°C on the rheological properties of blood and the composition of fatty acids in the erythrocyte membranes of laboratory rats.
abstract: The aim of this study was to assess the influence of a single session of maximal exercise performed in water (4°C or 25°C) on blood rheological properties and the composition of fatty acids in the erythrocyte membranes of laboratory rats. This study will permit better understanding of the reactions occurring in the organism during rapid cooling in cold water, especially in regards to the hemorheological and biochemical parameters of blood. When compared to the control group, exercise performed in water at 4°C led to an increase in the elongation index (EI, from 0.30 Pa to 4.24 Pa) with no concurrent changes in erythrocyte aggregation, blood plasma viscosity, and fatty acid composition (saturated, unsaturated, saturated/unsaturated, monounsaturated, polyunsaturated polyunsaturated-n3, polyunsaturated-n6 fatty acids) of the erythrocyte membrane. In rats swimming in water at 25°C, we observed an increase in EI at shear stress from 0.30 Pa to 2.19 Pa, along with a decrease in the half-time of total aggregation when compared to the control group. These changes in erythrocyte rheological properties can be treated as a protective reaction to thermal stress resulting in their improved deformability.
authors.affiliation: Department of Clinical Rehabilitation, University School of Physical Education in Cracow, Cracow, Poland. aneta.teleglow@awf.krakow.pl
authors.forename: Aneta
authors.initials: A
authors.lastname: Teległów
authors.forename: Jan
authors.initials: J
authors.lastname: Bilski
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Dąbrowski
authors.forename: Anna
authors.initials: A
authors.lastname: Marchewka
authors.forename: Jerzy
authors.initials: J
authors.lastname: Jaśkiewicz
authors.forename: Joanna
authors.initials: J
authors.lastname: Gdula-Argasińska
authors.forename: Jacek
authors.initials: J
authors.lastname: Głodzik
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Tabarowski
authors.forename: Dorota
authors.initials: D
authors.lastname: Lizak
mesh_terms: D000818:Animals; D001809:Blood Viscosity; D003080:Cold Temperature; D004903:Erythrocyte Aggregation; D004907:Erythrocyte Deformability; D004910:Erythrocyte Membrane / Q000737:chemistry*; D005227:Fatty Acids / Q000097:blood*; D018056:Hemorheology; D008297:Male; D010805:Physical Conditioning, Animal; D051381:Rats; D017208:Rats, Wistar; D013550:Swimming
chemical_list: D005227:Fatty Acids