1. CATECHOLAMINE LEVEL CHANGE OF HUNGARIAN ELITE ATHLETES DURING VITA MAXIMAL TEST
Protzner,A.,Trájer,E.,Udvardy,A.,Komka,Zs.,Bosnyák,E.,Szendrei,B.,Szőke,V.B.,Tóth,M.
Semmelweis University Faculty of Physical Education and Sport Sciences
National Institute Of Sport Medicine
Methods
A total of 93 subjects (68 elite athletes and 25 control) participated in this study. The athletes were from different sports: 16 handball players (19,8 hours/week), 27 football players (10,1 hours/week) and 25 triathlonists (19,7 hours/week). The mean age of the handball players was 27,81 years, of the football players 24,14 years and of the triatlonists 22,92 years.
After a medical examination and anthropometric measurements, the subjects completed a vita maximal treadmill protocol while VO2rel (ml/min/kg) was measured. Subsequently, 10mL of venous blood was extracted at rest (r) and after the test was over (max). Adrenalin (A) and noradrenalin (NA) were measured in venous plasma (pg/ml).
Statistical analysis was made by Statistica for Windows 9.0 software. One-Way Anova, post hoc Tukey test, linear correlation, Student t-test were used to learn about connections.
Introduction
Catecholamines like adrenalin and noradrenalin play an essential role in glucose metabolism in response to exercise. Adrenalin is a powerful regulator of a number of metabolic and physiological functions, and noradrenalin reflects the actions of the sympathetic nervous system. Exercise performed on intesity above anaerobic threshold leads to a marked increase in catecholamine levels.
Results
The rest adrenalin values were significantly higher in the elite athletes group (p=0,037). The same pattern can be observed in case of rest (p=0,00) and max (p=0,004) noradrenalin values.
Football players had significanty higher rest adrenalin values in comparism to the triathlonists (p=0,002) and the control group (p=0,001). The same pattern can be observed with max adrenalin values. Football players had significantly higher rest noradrenalin values, than the handball players (p=0,00), the triathlonists (p=0,00), and the control group (p=0,00). The max noradrenalin values were significantly higher in the group of the handball players compared to the triathlonists (p=0,00) and the control group (p=0,00). The soccer players had also higher levels, than the triathlonists (p=0,00) and the control group (p=0,00). We found significant correlationsbetween the handball players rest noradrenalin values and their rest heart rate (r=,623). Correlation analysis confirmed significant relation between football players rest adrenailn values and rest heartrate (p=,394), systole (p=,581) and dyastole (p=,390). The same pattern can be observed in case of noradrenalin values and rest heartrate values (p=,519). The same groups max adrenalin (r=,408) and noradrenalin (r=,538) values and maximal heartrate confirmed a significant relation.
Discussion
In this pilot study we observed higher differences at the cathecolamine values in case of elit athletes than among the control group, especially in football players. The control group had nearly same values like the triathlonists. Our future aim is to increase the number of the subjects, and examine the relationship between cathecolamines from more aspects.
References
Zouhal H, Gratas-Delamarche A. Rannou F. Granier P. Bentue-Ferrer D, Delamarch P. Between 21 and 34 Years of Age. Aging Alters the Catecholarnine Responses to Supramaximal Exercise in Endurance Trained Athletes. Int J Sports Med 1999; 20:
Christophe Hausswirth and Didier Lehénaff: Physiological Demands of Running During Long Distance Runs and Triathlons
Laboratory of Biomechanics and Physiology, French National Institute of Sport and Physical Education (INSEP), Paris, France
TÁMOP B-09/1/KMR