The growth rate for a population of 90 field mice in six months was 429%. If the number of births was 342, the number of deaths was 43, and there was no emigration, calculate the number of mice that migrated into the field. (ANSWER: 87.1)

For most athletes, the period in their yearly training cycle during which it is recommended to begin calorie restriction so as to lose significant amounts of stored body fat is the off-season or early in the preseason. Restriction of energy intake late in the preseason when there is rigorous training or during season when there is competition may impede training, recovery, or performance.