Insulin resistance, exercise capacity and body composition in subjects with two hypertensive parents

Ulrik B. Andersen*, Harriet Dige-Petersen, Hans Ibsen, Peter Skøtt, N. E. Bruun, Henrik Vestergaard, Claus Christiansen

*Corresponding author af dette arbejde

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    Abstrakt

    Objective. To study insulin resistance in subjects with strong genetic predisposition to essential hypertension compared with non-disposed subjects. Subjects. Thirty normotensive subjects aged 18-35 years whose parents both had essential hypertension, and 30 age- and sex matched subjects whose parents were both normotensive, were studied. Subjects or parents with diabetes and morbid obesity were excluded. Methods. The study comprised (1) a frequent sampling oral glucose tolerance test; (2) an isoglycemic hyperinsulinemic clamp study; (3) an analysis of body composition by dual-energy X-ray absorptiometry; (4) an exercise test with gas exchange analysis; and (5) investigation of composition of usual diet by diet registration for 5 days. Results. The 24-h diastolic blood pressure was higher in subjects predisposed to hypertension compared with the controls: 78.1 versus 74.0 mmHg (confidence interval for the difference between the means; -0.5; -7.9), but the insulin sensitivity index was similar: 312 versus 362 l2 min-1 pmol-1 kg-1 (28; -129). The two groups were similar in terms of body composition, exercise capacity and composition of usual diet. Resting and 24-h diastolic blood pressures were correlated to abdominal fat mass but not to insulin sensitivity. Conclusion. Subjects with a strong genetic predisposition to essential hypertension had increased diastolic blood pressure compared with subjects with normotensive parents, but they were not insulin resistant. This may be due to the subjects being highly selected as to confounding factors. The increased blood pressure in the hypertension prone subjects could not be attributed to differences in body composition, exercise capacity or dietary habits.

    OriginalsprogEngelsk
    Sider (fra-til)1273-1280
    Antal sider8
    TidsskriftJournal of Hypertension
    Vol/bind17
    Udgave nummer9
    DOI
    StatusUdgivet - 11 nov. 1999

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