What are the effects of performing an activity after completing a warm-up versus not doing a warm up?

Some effects of performing an activity after completing a warm-up versus not doing a warm-up are if you don't warm up, your performance will not be as spot on,  you won't have as good blood circulation, it is easier to pull a muscle/injure yourself, your flexibility won't be to the maximum, your central nervous system won't be as active. If you warm up, all the opposite of those reasons will benefit you.

If you don't warm up, you can EASILY hurt yourself, pull something, blow out a tendon, I should know I'm a gymnast!! Your performance also will not be as well without I warm up versus with a woman. Especially with sports like gymnastics, and dance, you cannot perform at your best if your muscles not warmed up.