Hormone Research in Paediatrics

 

Nifedipine Does Not Impair the Hormonal Responses to Graded Exercise in Healthy Subjects

Joffe B.I. · Shires R. · Lamprey J.M. · Kalk W.J. · Botha A. · Haitas B. · Seftel H.C.

Author affiliations

Carbohydrate and Lipid Metabolism Research Programme and Endocrine Unit, Department of Medicine, University of the Witwatersrand Medical School, Johannesburg, South Africa

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Horm Res 1985;21:88–94

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Article / Publication Details

First-Page Preview
Abstract of Paper

Received: May 29, 1984
Accepted: August 31, 1984
Published online: November 26, 2008
Issue release date: 1985

Number of Print Pages: 7
Number of Figures: 0
Number of Tables: 0

ISSN: 1663-2818 (Print)
eISSN: 1663-2826 (Online)

For additional information: https://www.karger.com/HRP

Abstract

The aim of this study was to assess whether the potent calcium antagonist nifedipine was capable of modifying the hormonal response to graded exercise in 7 healthy young men. After fasting overnight, each subject came to the laboratory on 2 consecutive mornings. On one day he was given 10 mg of nifedipine sublingually and on the other an identical placebo capsule; the order was randomised in a double-blind fashion over the 2 days. Thereafter each subject performed 2 successive short treadmill runs, equivalent to 60 and 100%, respectively, of maximal aerobic power. While significantly blunting the rise in mean systolic blood pressure and inducing a greater fall in diastolic blood pressure during and after exercise compared with the placebo, nifedipine did not impair the brisk response of pituitary-adrenal hormones (ACTH, cortisol and total catecholamines). Nifedipine also did not modify the effects of short-term exercise in raising mean plasma glucose levels, stimulating pancreatic glucagon secretion and producing a delayed increase in plasma insulin concentrations. Nor did the drug blunt the significant rise of growth hormone and prolactin levels occurring during and after the treadmill run. It was concluded that, apart from inducing significant changes in blood pressure, a single dose of nifedipine does not appear to suppress the counterregulatory hormonal responses to short-term physical activity in healthy men.

© 1985 S. Karger AG, Basel




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Article / Publication Details

First-Page Preview
Abstract of Paper

Received: May 29, 1984
Accepted: August 31, 1984
Published online: November 26, 2008
Issue release date: 1985

Number of Print Pages: 7
Number of Figures: 0
Number of Tables: 0

ISSN: 1663-2818 (Print)
eISSN: 1663-2826 (Online)

For additional information: https://www.karger.com/HRP


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