Adequate Intake (AI)
A recommended average daily nutrient intake level, based on observed (or experimentally determined) approximations or estimates of nutrient intake that are assumed to be adequate for a group (or groups) of healthy people; Measure is used when RDA can not be determined.
Estimated Average Requirement (EAR)
The average daily nutrient intake level that is estimated to meet the requirement of half the healthy individuals who are in a particular life stage and gender group.
The co-contraction of global muscles.