Abstract des Autors

In dependence of load intensity, the reaction of neuromuscular reactivity was studied after a 6-week one-legged bicycle ergometer training. For this investigation, 27 not specifically trained male and female sports students with a mean age of 25+/-3 years performed an ergometer training 4 times a week. On the basis of muscle biopsy of the non-dominant m. vastus lateralis, the subjects were divided into a heterogenous aerobic (2 to 3 mmol/lactate) and anaerobic training group (6 to 8 mmol/l lactate). The individual training load was performed with the non-dominant leg. The excitability curves were ascertained for m. vastus lateralis and m. rectus femoris of both legs. The anaerobic training resulted in a significant increase of excitability in m. vastus lateralis for rheobasic impulse times. For m. rectus femoris (anaerobic group), a statistically proven mean curve shift towards hyperreactivity in the range of long impulse durations could be substantiated. Qualitatively different endurance training reduces the excitability threshold of the predominantly exercised muscle. Verf.-Referat