Document Detail

Alterations in the morning plasma levels of hormones and the endocrine responses to bicycle exercise during prolonged strain. The significance of energy and sleep deprivation.
MedLine Citation:
PMID:  1872119     Owner:  NLM     Status:  MEDLINE    
The relative significance of physical exercise, energy and sleep deprivation for the morning levels of hormones and the endocrine response to short-term bicycle exercise were investigated in 24 male cadets during a 5-day military training course. Significant increases in the morning levels of noradrenaline, adrenaline, and dopamine, and a decrease in PRL were ascribed mainly to physical strain. Cortisol and hGH increased, whereas insulin and glucose decreased mainly due to energy deficiency. Pulse rate after the bicycle test was unchanged and similar in all groups in spite of increased catecholamine responses. The increased catecholamine response was mainly due to physical strain. The cortisol response to the bicycle test was increased in all groups, and energy deficiency caused slower postexercise recovery. The incremental hGH response to the exercise test was unchanged in the energy-deficient subjects but abolished in the well-fed subjects. The results suggest that the endocrine responses during long-lasting exhausting strain were mainly due to physical exertion and energy deficiency, whereas sleep deprivation did not play any major role.
P K Opstad
Related Documents :
21921819 - Movement and skill analysis of supercross bmx.
21873499 - Early subclinical increase in pulmonary water content in athletes performing sustained ...
8470869 - Effect of inpatient versus outpatient measurement protocol on resting metabolic rate an...
18460989 - Effect of fastskin suits on performance, drag, and energy cost of swimming.
21804299 - The effect of season and light intensity on the core interthreshold zone.
9506799 - Evaluation of a commercial accelerometer (tritrac-r3 d) to measure energy expenditure d...
21864869 - Acute resistance exercise augments integrative myofibrillar protein synthesis.
19713649 - The borg scale as an important tool of self-monitoring and self-regulation of exercise ...
16917019 - Possible inhibitory role of prolactin-releasing peptide for acth release associated wit...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Acta endocrinologica     Volume:  125     ISSN:  0001-5598     ISO Abbreviation:  Acta Endocrinol.     Publication Date:  1991 Jul 
Date Detail:
Created Date:  1991-09-13     Completed Date:  1991-09-13     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370312     Medline TA:  Acta Endocrinol (Copenh)     Country:  DENMARK    
Other Details:
Languages:  eng     Pagination:  14-22     Citation Subset:  IM    
Norwegian Defence Research Establishment, Kjeller.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Blood Glucose / analysis
Catecholamines / blood
Circadian Rhythm*
Endocrine Glands / physiopathology*
Energy Metabolism*
Growth Hormone / blood
Hormones / blood*
Hydrocortisone / blood
Insulin / blood
Prolactin / blood
Sleep Deprivation / physiology*
Stress, Physiological / blood,  physiopathology*
Reg. No./Substance:
0/Blood Glucose; 0/Catecholamines; 0/Hormones; 11061-68-0/Insulin; 50-23-7/Hydrocortisone; 9002-62-4/Prolactin; 9002-72-6/Growth Hormone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Oxytocin influences preovulatory follicular development and advances ovulation in rats.
Next Document:  The effect of human growth hormone therapy on GH binding protein in GH-deficient children.