This probably isn't the correct forum for this topic but oh well, can't hurt =)
I like to watch some old Kung Fu movies and drink my homemade lemonade throughout practice. Four tablespoons lemom joice, four tablespoons maple serup in a quart of water. Maple serup contains loads of complex sugars, fantastic for keeping you fresh through hours of hard training without food. The lemon is really just there for training and the water should be obvious.
It's all attitude. When you hear people talking about Ki or Chi they're just talking about attitude. Mindset, emotions, attitude. Learning how to manipulate the subleties of your mind and body is very important in martial arts.