This might sound like a silly question, but at what point do people stop training before the Fellsman?

I've got some more long walks planned for next weekend (7/8 Apr) but was then going to stick to low impact, low/medium intensity training like swimming and cycling in the build up with no excercise in the week beforehand. Does this sound sensible? I'm also nervous of picking up an injury before the event too!

Thanks
JP