Abstract
Responses of free plasma noradrenaline and adrenaline were evaluated in 10 competition
cyclists, 8 competition weight lifters, and 9 untrained control subjects during exhaustive,
incremental cycling. Ergometric performance and oxygen uptake ability were 403 ± 20
W and 65.8 ± 4.7 ml · kg-1 for the cyclicsts, 294 ± 42 W and 47.2 ± 4.6 ml for the weight lifters, and 296 ±
40 W and 46.7 ± 9.4 ml for the control subjects. At 100- and 150-W levels, noradrenaline
was significantly lower in cyclists and weight lifters, and in cyclists also at 200-
and 250-W levels, related to the other groups. No significant noradrenaline differences
were seen between the three groups at their respective exhaustion levels. Compared
with the control subjects, adrenaline responses were lower in cyclists and weight
lifters at all identical work loads. The weight lifters showed the lowest levels of
all three groups, even at their exhaustion level, which indicates an alteration of
the adrenaline-noradrenaline ratio. Dynamically and statically trained subjects exhibit
a similar training-related control of sympathetic activity. An increased vagal tone,
however, only occurs in conjunction with dynamic endurance training.
Key words
Static - dynamic training - catecholamines
