A muscle exercised in a manner specific to the sport or activity being developed is called O Speed
O Progression
O Sequencing
O Specificity

D- Specificity (I go it right on edge)

Depression is lifelong, though you can get medication to with it. the difference between sadness and depression is that sadness lasts a little bit, depression last a long time and it goes on and off. people usually get depression through experiences they have been through, or genetics.