Yoga is one of the best ways to get fit.
It Helps your Strength
It helps your posture (sit up straight ladies)
It lifts your mood
it increases your cardio (IF you breath right)
Basically it gives you the long, lean, "dancer body" most women want. even if your only 5'1 1/2 feet like me!
Remember: make sure you always consult your physician before you start any exercise program