The word fitness means "suited to the circumstances, proper," and more specifically in relation to physical condition it means "in condition, properly trained for action." Keeping our bodies in a condition properly trained for the actions we demand of it is a component of health.
The world Health means "wholeness, a being whole, sound or well." It refers to being sound, well, whole in physical, mental and spiritual function.
The following article is based upon a 1943 Women's Army Corp Physical Fitness Manual. The concepts it expresses are nevertheless as useful today as they ever have been. Quotations below are taken from FM 35-20 W.A.C. Field Manual Physical Training, 1943. Let's look at the concepts shared in that manual and how the women of WWII prepared themselves.