Abstract Effects of intramuscular maximum strength training using threshold stimulationBSc. Ingo FilzwieserInstitute of Sports Science, Karl-Franzens University Graz This script compares the results of a strength training combined with additional threshold stimulation with conventional strength training. Besides the power capacity, the intramuscular coordination is tested with EMG - measurements. Hypotheses: Through a four-week maximum strength training with additional innervation using threshold stimulation, both the power capability (H1) and the intra-muscular coordination (H2) increase more than with a conventional workout. The participants were divided into three study groups. One training group with a threshold stimulation, one group with the traditional training and the control group.The form of intervention consisted of a four-week climbing-specific maximum strength training. There has been one input test and two output tests. In each of these, three climbing specific forms of support (static stretched, static at 90 elbow angle, dynamic) were performed with one arm at a 15mm wide bar, while the maximum weight support with the second hand was also measured on a spring balance. The derived variables were: (1) The one-armed strength capability by measuring results of the spring scale and (2) the intramuscular coordination of four arm muscles using the surface of the root-mean-square EMG's over two seconds during the movement. Statistical analysis was performed by two or three factorial ANOVA with repeated measures and Bonferroni-Holmes corrected post hoc t tests.The static and dynamic power capacity increased in both strength training groups (group A: +26%, F (2,18) = 21:25, p<0.01, group B: +22%, F (2,18) = 44.35, p<0.01 ) significantly over the training period. The muscular activation was only influenced in training group A (electricity) (F (2,18) = 7.23, p <0.01) and was increased by 34% between the entrance test and the 2nd output Test (p <0.01).