On Fri, Jan 23, 2015 at 11:09 AM, P Isabella <isabella at bendnet.com> wrote: > This is a good subject. I wonder if anyone has seen research on why hikers have trouble sleeping? Electrolyte shortage? Low Protein intake? Or?< My guess is: Hard ground, thin pads, sore muscles. It takes me about 4 weeks of sleeping on the ground to get used to it, and sleep well.