I bought my mother a delta trike by the same company, she has the same problem with the setup. The one solution I found but have to clear with her first is to lay the seat back about 15-20 degrees and that will take putting your knees out of your chest. For a recumbent it has a very high angle for the seat back. Everything else is just right for her so changing the length of the crank arms or changing the distance to the peddles is not necessary.