In the first month, I could do nothing but curl up and sleep in order to recover.

But gradually, I needed to get out and do some light walking for my sanity and recovery. It was really important to be out in nature. It helped my mood and was so central to my brain and body to work in concert.

I think we need to push ourselves to our threshold mentally and physically. It's hard to know what that threshold is, however. It's dynamic.

And there is nothing as powerful as nature-the sounds, smell and healing power of it all.