A high activity level is seen in rapid tempo and vigorous movement, in a sense of energy, and in a need to keep busy. Active people lead fast-paced lives. Low scorers are more leisurely and relaxed in tempo, altough they are not necessarily sluggish or lazy.
Source: Costa, P. T. and McCrae, R. R. (1992). NEO PI-R Professional Manual. Psychological Assessment Resources, Inc., Odessa. FL