From an inactive and obese to a fit child: how long is the way? Czech experiences.

To achieve a higher level of overall fitness and to prevent obesity with accompanying comorbidities requires life-long effort starting early in life during the prenatal period. A sufficiently intense, regular, and ongoing physical activity regime and adequate exercise are indispensable, along with monitored diet. Once acquired, a desirable level of body composition and functional capacity can be lost relatively quickly due to regime interruption. Adhering to the optimal regime of diet and activity that not long ago used to be the norm is especially difficult under present life conditions, and new and innovative procedures have to be defined and introduced.