Hormonal and metabolic response to three types of exercise of equal duration and external work output

  title={Hormonal and metabolic response to three types of exercise of equal duration and external work output},
  author={W. P. Vanhelder and Manny W Radomski and Robert C. Goode and Kathleen K. Casey},
  journal={European Journal of Applied Physiology and Occupational Physiology},
SummaryFive normal men, aged 20–30 years, participated in three types of exercise (I, II, III) of equal duration (20 min) and total external work output (120–180 kJ) separated by ten days of rest. Exercises consisted of seven sets of squats with barbells on the shoulders (I; Maximal Power Output $$\dot W$$ max=600−900 W), continuous cycling at 50 rev · min−1 (II; $$\dot W$$ max=100−150 W) and seven bouts of intermittent cycling at 70 rev · min−1 (III; $$\dot W$$ max=300−450 W).Plasma cortisol… 

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Steroid and pituitary hormone responses to rowing: relative significance of exercise intensity and duration and performance level

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Possible Stimuli for Strength and Power Adaptation

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Growth hormone response to continuous and intermittent exercise.

No physiologically significant correlation was found between hGH and metabolite concentrations, rectal T, or O2 deficit, which is interpreted to mean that hGH response to work is not directly related to "anaerobiosis".

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Metabolic adaptation to prolonged exercise

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Substrate turnover during prolonged exercise in man. Splanchnic and leg metabolism of glucose, free fatty acids, and amino acids.

Blood glucose levels fall because hepatic glucose output fails to keep up with augmented glucose utilization by the exercising legs, and augmented secretion of glucagon may play an important role in the metabolic adaptation to prolonged exercise by its stimulatory influence on hepatic glycogenolysis and gluconeogenesis.

Metabolic and hormonal effects of muscular exercise in juvenile type diabetics

The results suggest that in moderately controlled, non-ketotic diabetics blood glucose falls during exercise; in ketotic, relatively insulin deficient patients, muscular activity has adverse metabolic and hormonal effects: a further increase in blood glucose, plasma glucagon and cortisol and a rapid aggravation of ketosis.

[Effect of muscular exercise on day-time variations of plasma cortisol and glucose in normal men (author's transl)].

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The role of glucocorticoids in exercise.

  • G. Tharp
  • Biology
    Medicine and science in sports
  • 1975
The changes in GC response during training appear to be produced by decreased responsiveness of the adrenal cortex itself to ACTH stimulation and possibly by adaptation of the hypothalamus-hypophysis axis which reduces the ACTH released in response to stress.