ECE2015 Eposter Presentations Endocrine nursing (6 abstracts)
1Departments of Clinical Science, University of Bergen, Bergen, Norway; 2Department of Medicine, Haukeland University Hospital, Bergen, Norway; 3Department of Endocrinology, Oslo University Hospital Rikshospitalet, Oslo, Norway; 4Global Public Health and Primary Care University of Bergen, Bergen, Norway.
Many patients with primary adrenal insufficiency (Addisons disease) take extra doses of glucocorticoids before or during stressful events, but benefit has not been demonstrated. We aimed to test the effect of an extra dose of glucocorticoids on cardiorespiratory, hormonal and metabolic parameters in response to physical activity in a randomised placebo-controlled, 2-weeks cross-over, clinical trial (clinicaltrials.gov NTC01847690). Ten women with Addisons disease and ten female controls participated in the study. All underwent maximal incremental exercise testing. A stress dose of 10 mg hydrocortisone or placebo was given 1 h before exercise on two occasions. Blood samples were drawn before, and at 0, 15 and 30 min post exercise. The glycaemia was followed by continuous glucose monitoring for 24 h. The primary endpoints were oxygen uptake (O2 uptake), maximal aerobic capacity (VO2 max). Secondary outcomes were detailed ergometric parameters, and duration of exercise, post-exercise hypoglycaemic events and glycaemic variability, endocrine and metabolic responses to physical activity, and health status evaluated by questionnaires. VO2max and duration of exercise were significantly lower in patients compared to controls and did not improve with the treatment. Stress-dosed hydrocortisone elevated serum cortisol significantly (cortisolmax mean 671 nmol/l (S.D. 49) vs 204 nmol/l (S.D. 41), P<0.0001). After exercise the blood glucose and adrenaline levels were significantly lower, and free fatty acids slightly higher, in the patients than in the controls, irrespective of stress dose. No differences were found between the treatments in metabolic or hormonal parameters or quality of life after the exercise. In conclusion, patients did not obtain benefits from stress-dosed hydrocortisone during strenuous short-term exercise. And such dosing does not seem justified in this setting.