Because not all muscle fibers are differentiated to a specif…

Because not all muscle fibers are differentiated to a specific type of fiber, such as type I or type IIb, we know that infants’ early activities influence the proportion of fiber types, so we can prepare them to excel at certain kinds of activities in later life.

After the age of 3 years, individuals tend to maintain their…

After the age of 3 years, individuals tend to maintain their percentile position in comparison with group norms (i.e., if they are at the 40th percentile for height at age 3, they tend to remain around the 40th percentile throughout childhood and adolescence).