Oakland Athletics. The Oakland Athletics (often abbreviated to A's) are an American professional baseball team based in Oakland, California. The Athletics compete in Major League Baseball (MLB) as a member club of the American League (AL) West division. The club plays its home games at the OaklandâAlameda County Coliseum.
In early adulthood (ages 20â40), our physical abilities are at their peak, including muscle strength, reaction time, sensory abilities, and cardiac functioning. The aging process also begins during early adulthood and is characterized by changes in skin, vision, and reproductive capability.
Physical Development. Teenagers can grow 3.5 to 4.1 inches during a one-year growth spurt, and 50 percent of their adult weight and bone mass develops during teenage years. With this increase in height, boys gain weight because of increased muscle development and girls due to body fat needed for developing reproductive processes.