PURPOSE: The aim of this study was to clarify whether exercising in a tropical climate induces blood rheology alterations despite ad libitum hydration. METHODS: Hematological, biochemical and hemorheological changes were investigated in young healthy adults (N = 9 men, 20.7 ± 0.8 yrs) after a 10-km race in hot and humid conditions. Subjects' maximal aerobic abilities were tested using a maximal ramp exercise. Blood was sampled at rest (TR), at the end of the race (TEx), and after 24 hours of recovery (T24). Ad libitum hydration was allowed during the race. Blood viscosity (ηb), red blood cell deformability (EI), aggregation (AI) and disaggregation shear rate (γ) were measured. RESULTS: Hematocrit, hemoglobin and plasma concentration of chlorine, sodium and potassium did not change in response to exercise. No functional consequence was observed on RBC deformability since EI remained unchanged. Percentages of echinocytes, schizocytes and stomatocytes remained in the subclinical range at all times. AI, γ and ηb did not present change. CONCLUSION: Running exercise in tropical climate with ad libitum hydration does not alter the main rheological properties of blood.
PURPOSE: The aim of this study was to clarify whether exercising in a tropical climate induces blood rheology alterations despite ad libitum hydration. METHODS: Hematological, biochemical and hemorheological changes were investigated in young healthy adults (N = 9 men, 20.7 ± 0.8 yrs) after a 10-km race in hot and humid conditions. Subjects' maximal aerobic abilities were tested using a maximal ramp exercise. Blood was sampled at rest (TR), at the end of the race (TEx), and after 24 hours of recovery (T24). Ad libitum hydration was allowed during the race. Blood viscosity (ηb), red blood cell deformability (EI), aggregation (AI) and disaggregation shear rate (γ) were measured. RESULTS: Hematocrit, hemoglobin and plasma concentration of chlorine, sodium and potassium did not change in response to exercise. No functional consequence was observed on RBC deformability since EI remained unchanged. Percentages of echinocytes, schizocytes and stomatocytes remained in the subclinical range at all times. AI, γ and ηb did not present change. CONCLUSION: Running exercise in tropical climate with ad libitum hydration does not alter the main rheological properties of blood.
Authors: Jan Bilski; Aneta Teległów; Janusz Pokorski; Jacek Nitecki; Joanna Pokorska; Ewa Nitecka; Anna Marchewka; Zbigniew Dąbrowski; Jakub Marchewka Journal: Biomed Res Int Date: 2014-06-26 Impact factor: 3.411
Authors: Elie Nader; Sarah Skinner; Marc Romana; Romain Fort; Nathalie Lemonne; Nicolas Guillot; Alexandra Gauthier; Sophie Antoine-Jonville; Céline Renoux; Marie-Dominique Hardy-Dessources; Emeric Stauffer; Philippe Joly; Yves Bertrand; Philippe Connes Journal: Front Physiol Date: 2019-10-17 Impact factor: 4.566