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  • Title: Endurance running performance in relation to cardiovascular risk indicators in adolescents.
    Author: Bergström E, Hernell O, Persson LA.
    Journal: Int J Sports Med; 1997 May; 18(4):300-7. PubMed ID: 9231849.
    Abstract:
    We evaluated endurance running performance and body mass index (BMI) in relation to biochemical cardiovascular disease (CVD) risk indicators (s-lipids, s-insulin, s-ferritin), and blood pressure in 14- and 17-year-old healthy Swedish adolescents (n = 879), also considering current dietary intake and physical activity. Endurance running performance was assessed using a 3 km running test and height, body weight, waist and hip circumference, and skinfolds were measured at clinical examination. Physical activity and dietary intake were evaluated using self-reported 7-day-records. The results showed that high endurance running performance was related to a favourable CVD risk indicator profile. Multiple regression analyses including running time, BMI, physical activity, dietary fat and iron intake, and age as independent and s-lipids, s-insulin, and s-ferritin as dependent variables revealed that, in both boys and girls, low BMI was associated to a favourable s-lipid profile and lower s-insulin values and, in boys but not in girls, also to lower s-ferritin values. There were, however, no independent associations between level of physical activity or endurance running performance on the one side and s-lipids, s-insulin, or s-ferritin values on the other. High dietary fat intake was associated to s-lipids in a non-atherogenic direction; in boys to higher HDL-C and in girls to lower TG. In conclusion the study showed that body mass seems to be the most important factor explaining the differences in s-lipid and s-insulin values between adolescents with different level of physical performance capacity. An interesting finding was, that s-ferritin, being a proposed risk factor for CVD, in the older boys related to body mass in a similar way as s-lipids and s-insulin.
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