title: Effects of cold water swimming on blood rheological properties and composition of fatty acids in erythrocyte membranes of untrained older rats.
abstract: This is the first report on the effects of a single bout of swimming to exhaustion in cold water on rat erythrocyte deformability, aggregation and fatty acid composition in erythrocyte membranes. The results indicate that there was a significant decrease in body temperature of experimental rats swimming in water at 4 degrees C and 25 degrees C when compared to the control. Erythrocyte aggregation indices did not change after swimming in water at 4 degrees C whereas erythrocyte deformability increased at shear stress 1,13 [Pa] and 15,96 [Pa]. Physical effort performed in water at 4 degrees C when compared to the control group resulted in an increase in monounsaturated and polyunsaturated n-3 fatty acid content in erythrocyte membranes that influenced the increase in their fluidity and permeability even though that of polyunsaturated n-6 fatty acids decreased. Physical effort performed in 25 degrees C water resulted in an increase in saturated fatty acid content and a decrease in all polyunsaturated fatty acids and polyunsaturated n-6 fatty acids when compared to the control group. Swimming of untrained old rats in cold water affected rheological properties oferythrocytes in a negligible way while changes in the fatty acid composition of erythrocyte membranes were more pronounced.
authors.affiliation: Department of Clinical Rehabilitation, University School of Physical Education, Jana Pawła II 78, 31-571 Kraków, Poland. aneta.teleglow@awfkrakow.pl
authors.forename: Aneta
authors.initials: A
authors.lastname: Teległów
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Dabrowski
authors.forename: Anna
authors.initials: A
authors.lastname: Marchewka
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Tabarowski
authors.forename: Jan
authors.initials: J
authors.lastname: Bilski
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: Dorota
authors.initials: D
authors.lastname: Lizak
authors.forename: Magdalena
authors.initials: M
authors.lastname: Kepińska
mesh_terms: D000818:Animals; D001769:Blood; D003080:Cold Temperature; D004910:Erythrocyte Membrane / Q000378:metabolism*; D005227:Fatty Acids / Q000097:blood*; D008297:Male; D010805:Physical Conditioning, Animal; D051381:Rats; D017208:Rats, Wistar; D012212:Rheology; D013550:Swimming
chemical_list: D005227:Fatty Acids