title: Blood rheology effect of submaximal exercise on young subjects.
abstract: Nowadays cardiac and metabolic diseases are a matter of concern. Exercise is a valid treatment and method of prevention for not only adults, but also young subjects. Physical activity causes transient blood rheology impairment in adults. However little is known about the effects of exercise on blood flow characteristics in young subjects. The aim of the study was to assess the effects of a light aerobic exercise session on blood rheology in young subjects. Ten young subjects (aged 12-16 years) performed 1 hour of submaximal aerobic exercise (70% HRmax). Blood samples were drawn just before and after exercise. We determined blood and plasma viscosity, fibrinogen, erythrocyte deformability and aggregability. No changes in blood viscosity (p > 0.05), erythrocyte aggregation (p > 0.05) and fibrinogen (p > 0.05) were observed. Hematocrit (p = 0.025) and plasma viscosity (p = 0.018) rose with exercise, while erythrocyte elongation index lowered (p < 0.001). Plasma volume slightly reduced which may explain the lack of changes in blood viscosity. The results of the present study indicate a similar hemorheological response to submaximal exercise in both young people and adults.
authors.affiliation: School of Medicine, Catholic University of Valencia, Valencia, Spain.
authors.forename: Marco
authors.initials: M
authors.lastname: Romagnoli
authors.affiliation: School of Medicine, Catholic University of Valencia, Valencia, Spain.
authors.forename: Rafael
authors.initials: R
authors.lastname: Alis
authors.affiliation: Department of Physiology. University of Valencia, Valencia, Spain.
authors.forename: Vladimir
authors.initials: V
authors.lastname: Martinez-Bello
authors.affiliation: Department of Physiology. University of Valencia, Valencia, Spain.
authors.forename: Fabian
authors.initials: F
authors.lastname: Sanchis-Gomar
authors.affiliation: Sports Medicine Center, Xest, Valencia, Spain Department of Physiology. University of Valencia, Valencia, Spain.
authors.forename: Rafael
authors.initials: R
authors.lastname: Aranda
authors.affiliation: Department of Physiology. University of Valencia, Valencia, Spain.
authors.forename: Mari-Carmen
authors.initials: MC
authors.lastname: Gómez-Cabrera
mesh_terms: D000293:Adolescent; D002648:Child; D015444:Exercise / Q000502:physiology*; D005260:Female; D005340:Fibrinogen / Q000032:analysis; D006400:Hematocrit; D018056:Hemorheology; D006801:Humans; D008297:Male; D010953:Plasma Volume
chemical_list: D005340:Fibrinogen
keywords: Hemorheology; submaximal exercise; youth