During my weekly Tabata class the sound of these words occur several times - 3,2,1 Begin. Tabata is a fitness routine consisting of 20 second intervals of heart pumping cardio exercise, a 10 second rest and then 20 seconds of a strength exercise. Computer voices countdown to the beginning - 3,2,1 Begin and then count down the ascent - 3, 2,1 Rest. In between the counts, our bodies are pushed to the limit, but we eagerly await that countdown to rest. Physical fitness is an investment and the purpose of each class is to become stronger. Going in and simply going through the motions will bring very little change or improvement. Recently, one of the ladies in class encouraged us as we awaited the countdown - keep going till you hear 'rest'. Usually, we would end the specific exercise as the countdown began, but she encouraged us to continue the movement past 3, 2 and even 1, until we heard REST. It probably amounted to 1 extra second, but the concep...