ABSTRACT
The environment includes all sorts of in uences of varying character, such as geographical, climatic, social, economic, cultural, familial, nutritional, lifestyle, and PA factors; human development can be signi cantly altered due to their interrelationships. Sensitivityto such factors may be modi ed by genetic predispositions, and eventually by early factors, which are responsible for the extent of the consequences. This applies especially to the period of growth, when the organism is more sensitive than later on in life. There have appeared, in the past, modi cations due to developing and changing environments; their criteria and importance, set some decades before, may not be fully valid at the present time.
