Yoga is the Sanskrit word which means to unite or make whole.  The practice combines the use of asana (postures), pranayam (breathing), meditation, and other relaxation techniques.  On a physical level, yoga will strengthen and stretch muscles, increase circulation and energy, improve balance, strengthen and align joints, and enhance the immune system.  On a mental level, yoga reduces stress and fatigue, enhances body awareness and respect for the body, increases self acceptance, and quiets us to a state where we can recognize what really matters in the world and to ourselves.