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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of applied physiology 46 (1981), S. 305-315 
    ISSN: 1439-6327
    Keywords: Women ; Plasmacatecholamines ; Aerobic-anaerobic capacity ; Treadmill exercise ; Frauen ; Plasmacatecholamine ; Aerob-anaerobe KapazitÄt ; Laufbandergometrie
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Adrenalin, Noradrenalin, Lactat und Glucose im Blut sowie die Herzfrequenz und O2-Aufnahme wurde bei neun gesunden Frauen (29,3±2,2 Jahre) wÄhrend einer stufenweisen Laufbandergometrie untersucht. In Ruhe unterscheiden sich alle Parameter gegenüber mÄnnlichen Probanden nicht. WÄhrend der Ergometrie sind wie bei mÄnnlichen Probanden zwei Bereiche zu unterscheiden: ein Bereich geringer Zunahme von Adrenalin, Noradrenalin und Lactat, entsprechend einer überwiegend aeroben Energiebereitstellung und ein Bereich mit acht- bis zehnmal höherer Zunahme von Adrenalin, Noradrenalin und Lactat, entsprechend einer zusÄtzlichen zunehmenden anaeroben Energiebereitstellung; der übergang zwischen beiden Bereichen entspricht dem aerob-anaeroben übergangsbereich und erfolgt wie bei mÄnnlichen Versuchspersonen bei einer O2-Aufnahme und Herzfrequenz von 70–80% und einer Catecholamin- und Lactatkonzentration von 20–30% des Maximalwertes. Adrenalin und Noradrenalin sind auf gleichen Belastungsstufen 0,3–1 ng/ml bzw. 2–4 ng/ml höher als bei mÄnnlichen Probanden. In Beziehung zur O2-AufnÄhme in Prozent des Maximalwertes oder zur Herzfrequenz, als Parameter für die relative Grö\e einer Belastung, gleichen sich die Unterschiede an. Es besteht wie bei mÄnnlichen Personen ein direktes lineares VerhÄltnis zwischen Adrenalin und Noradrenalin. WÄhrend der Ergometrie nehmen Adrenalin ca. 1300%, Noradrenalin ca. 1500%, Lactat ca. 1100%, Glucose ca. 30%, die Herzfrequenz ca. 200% und die O2-Aufnahme um ca. 1000% zu. Zwischen dem Catecholamin, dem Lactat- und Glucosespiegel bestehen direkte lineare Korrelationen. Bezogen auf die Catecholamine ist der Lactatspiegel niedriger als bei mÄnnlichen Versuchspersonen, was einem Schutzmechanismus gegen eine zu starke übersÄuerung entsprechen kann.
    Notes: Summary Blood levels of adrenalin, noradrenalin lactate, and glucose, and heart rate and oxygen intake were examined in nine healthy women (29.3±2.2 years) during a graduated treadmill exercise. At rest there are no differences in these parameters compared with male subjects. During treadmill exercise, two ranges can be distinguished as in male subjects. A range with a slight increase in adrenalin, noradrenalin, and lactate, corresponding to a predominantly aerobic energy supply, and a range with an eight to ten times higher increase of adrenalin, noradrenalin, and lactate related to an additionally increasing anaerobic energy supply. The transition between the two ranges corresponds approximately to the anaerobic threshold, and occurs as in male subjects at an oxygen intake and heart rate of 70–80% and a catecholamine and lactate concentration of 20–30% of the maximal value. At the same exercise level, adrenalin, and noradrenalin are higher than in male subjects. Differences in the relative oxygen intake or the heart rate are similar. During maximal treadmill exercise adrenalin increased by 1,300%, noradrenalin 1,500%, lactate 1,100%, glucose 30%, the oxygen intake 1,000%, and the heart rate by about 200%. During ergometric exercise, as in male subjects there is a direct linear correlation between adrenalin and noradrenalin. A direct linear correlation excists between the catecholamines and lactate or glucose levels. Referring to the catecholamines, the lactate level is lower than in male subjects, corresponding to a limitation of acidosis in females.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of applied physiology 55 (1986), S. 54-58 
    ISSN: 1439-6327
    Keywords: Men ; Women ; Catecholamines ; Exercise
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Sex-related differences of catecholamine responses were evaluated in nine healthy women and six age-matched men at rest and during incremental treadmill erxercise. Heart rate, oxygen uptake ( $$V_{{\text{O}}_{\text{2}} }$$ ), glucose and lactate blood levels as well as the free plasma catecholamines, noradrenaline and adrenaline, were determined. No significant differences were observed for these parameters between the two groups at rest. The females had relative $$V_{O_{2{\text{max}}} } $$ and maximal running velocities similar to the males, which points to a comparable dynamic performance ability. However, at identical work loads, noradrenaline, adrenaline and glucose levels were significantly higher in women than in men. Lactate, heart rate and relative $$V_{{\text{O}}_{\text{2}} }$$ showed a similar tendency at submaximal exercise levels, indicating higher strain at identical stress levels in women. The reason for the higher sympathetic activity in women at identical work loads may be their relatively smaller skeletal muscle mass in relation to the loads during this test.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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