Because children are intermittently active (they do not naturally engage in continuous activities, such as jogging), we need to make sure that they have multiple periods of moderate activity that are at least 10 to 15 minutes in duration each day (Corbin & Pangrazi, 1998).
Buff is the pale yellow-brown colour of the un-dyed leather of several animals.As an RYB quaternary colour, it is the darker colour produced by an equal mix of the tertiary colours citron and russet.uff is the traditional colour of the U.S. Army Quartermaster Corps. The U.S. Army Institute of Heraldry specifies a buff tincture for certain coats of arms.
phrasal verb buff up or buff someone or something up or buff up someone or something informal to become stronger and more muscular or to make someone or something stronger and more muscular by exercising and weight lifting she is buffing up for her role as a female boxer