Hello Søren,
thank you! Now I understand what you mean. Thats a very good input and I can use this additionally.
As you might have seen in the debug section, I uploaded my model due to failure of the inverse dynamics. Until yesterday I forgot to turn off Reaction.Type for my interpoldriver and now results look weird and analysis stops because of muscle recruitment solver problems. May you have a look at that too? It would be a big help if you can give me a tip and a remote diagnosis seems to be hard, at least for me 
Thank you so much. Of course when my model works I will provide it to you.
Best regards, Max