osmolarity
Type: Posts; User: Oso
osmolarity
http://www.youtube.com/watch?v=qRuNxHqwazs
drink water. whether you feel you want/need it or not. especially if working long hours in hot conditions or any workout over 30 minutes. it's really not that hard a question. :)
imo, it depends upon your average hydration.
if you normally stay well hydrated then you could do an hour workout w/o hydrating.
if you aren't normally well hydrated (check your ****, average...