The medial and lateral axes are in opposite directions.
The medial is used to indicate that a structure is closer to the median plane of the body, and this plane passes at the center of the entire body. While the lateral indicates that a structure is farther from the median plane. Take the example: The thumb (10 finger) is more lateral to the other fingers. The 50 finger is medial to the others.
Individuals who wish to enhance muscle growth and strength during periods of intense strength training should increase protein intake to about 10.5 grams per kilogram of body weight per day.