Kevin Petersen

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Severe osteoporosis frequently is observed after organ transplantation. In kidney transplantation, it adds to pre-existing renal bone disease and strategies to prevent osteoporosis are not established. Eighty kidney recipients were included in a randomized controlled prospective intervention trial. Treated patients (n = 40) received an injection of(More)
BACKGROUND Objective of this study was to get more insight in hematology, biochemistry, and endocrinology of ultra-endurance exercise, to improve knowledge in this field, supplementation, and medical care of affected athletes. METHODS A large body of individual hematological, biochemical, and endocrinological parameters was analyzed in the blood taken(More)
Performance and hormones were determined in eight middle- and nine long-distance runners after an increase in training volume (ITV, February 1989) or intensity (ITI, February 1990). Seven runners participated in both studies. The objective was to cause an overtraining syndrome. The mean training volume of 85.9 km week-1 increased within 3 weeks to 176.6 km(More)
BACKGROUND Few data have been published on training of competitive athletes and about metabolic, hormonal and psychological reactions to overreaching (transient over-training) and tapering in successful athletes. METHODS Training was recorded and effects on mood state and metabolic and hormonal responses were examined in 10 rowers and spares of the coxed(More)
The influence on pituitary function of 6 weeks of training on 6 days a week was examined in six recreational athletes. Endurance training on a bicycle ergometer for 31-33 min was performed on 4 days each week at 90-96% (weeks 1-3) and 89-92% (weeks 4-6) of the 4 mmol lactate thresholds determined on day 0 and day 21, respectively, with interval training of(More)
Leptin (L) is associated with body-weight-regulating and adipostatic functions. Its receptors also may be found centrally. Thyroid hormones regulate metabolic processes mainly by binding at peripheral receptors. Aim of this study was to show if there is a link between those central and peripheral regulation systems and to investigate the influence of(More)
HISTORY AND CLINICAL FINDINGS A 29-year-old woman was found to have arterial hypertension (175/115 mm Hg). The 24-hour profile showed no diurnal cortisol variations with normal concentrations and 24-hour urinary cortisol was normal. 14 months later there was definite hypercortisolism with discrete Cushing signs and no amenorrhoea. She also had signs of(More)
Counterregulatory secretion of epinephrine occurs during severe insulin-induced hypoglycemia. Under these conditions (minimal plasma glucose 27.4 +/- 1 mg/dl) the decrease of serum potassium concentration (0.9 mVal/L) is mediated by two mechanisms: insulin-induced (0.48 mVal/L) and epinephrine-induced (0.42 mVal/L) cellular uptake of potassium.(More)
In Gothenburg studies using clinical and electroencephalographic techniques have been undertaken continuously since 1958 on a large number of individuals of all ages. All individuals studied were without impairment to the central nervous system, according to a number of well-defined defined clinical criteria, and were termed normal. The term "normal" is(More)
We reported in 1986 [2, 3] on two patients with advanced primary orthostatic hypotension [1, 4, 5]. In the Schellong test, there was a marked decrease in arterial blood pressure without noteworthy increase in heart rate. Plasma catecholamine levels and renal catecholamine excretion were greatly reduced. Intravenous stimulation with Isproterenol and(More)