title: Nutritional and metabolic determinants of blood rheology differ between trained and sedentary individuals.
abstract: Body composition and nutrition have been reported to be correlated with blood rheology. However, in sedentary and in physically active individuals these relationships seem to be not exactly similar. This study investigated whether exercise training status influences these relationships. 32 athletes (ATH) (age: 25 ± 0.7 yr; body mass index (BMI): 23.75 ± 0.23 kg/m2) were compared to 21 sedentary subjects (SED) (age: 45.19 ± 2.90; BMI = 33.41 ± 1.33) with nutritional assessment (autoquestionnaire), bioelectrical impedancemetry, viscometry at high shear rate (MT90) and Myrenne aggregometer. Subjects differ according to age, weight and adiposity parameters. Their eating behavior is different: ATH eat a higher percentage of protein (p < 0.005), a lower percentage of lipid (p < 0.05), and a higher total amount of carbohydrate (+31% p < 0.02). Their viscosity factors are similar except plasma viscosity which is higher in SED than ATH (1.51 ± 0.03 vs 1.43 ± 0.02 mPa.s, p < 0.05). In both ATH and SED, abdominal obesity (waist-to-hip ratio or WHR) is associated with impairments in blood rheology, but not exactly the same. In ATH, WHR is associated with an increase in hematocrit (r = 0.647; p = 0.009), plasma viscosity (r = 0.723; p = 0.002), and caloric (and CHO) intake moderately increase RBC rigidity (r = 0.5405; p = 0.0251) and aggregability (r = 0.3366 p = 0.0596). In SED the picture is different, adiposity increases hematocrit (r = 0.460; p = 0.048), abdominal fatness increases blood viscosity independent of hematocrit, and CHO intake is associated with lower RBC aggregability (r = -0.493; p = 0.0319).
authors: Laboratoire Performance, Universite Perpignan Via Domitia, Santé, Altitude, Perpignan, France Laboratoire de Biophysique & Bio-Analyses, Faculté de Pharmacie, Université Montpellier I, France.
authors: Emmanuelle
authors: E
authors: Varlet-Marie
authors: Marie
authors: M
authors: Guiraudou
authors: Christine
authors: C
authors: Fédou
authors: Eric
authors: E
authors: Raynaud de Mauverger
authors: Fabienne
authors: F
authors: Durand
authors: Jean-Frédéric
authors: JF
authors: Brun
mesh_terms: D000328:Adult; D056352:Athletes; D001809:Blood Viscosity; D001823:Body Composition / Q000502:physiology*; D015992:Body Mass Index; D004032:Diet; D004903:Erythrocyte Aggregation; D004907:Erythrocyte Deformability; D015444:Exercise / Q000502:physiology*; D005260:Female; D018056:Hemorheology / Q000502:physiology*; D006801:Humans; D008297:Male; D015596:Nutrition Assessment; D057185:Sedentary Behavior
keywords: Nutrition; blood viscosity; carbohydrates; erythrocyte aggregation; exercise; fat mass; hematocrit; hemorheology; plasma viscosity