Training Principle: Specificity is... increasing repetitions every week to show growth e. g. 8, 10, 12
lifting or performing beyond normal performance
Performing the activity in which one want to improve. e. g. running 3x pe
mile time
All of the above

The correct answer is - Performing the activity in which one want to improve. e.g. running 3x per mile time

Explanation:

Specificity is one of the three training principles. Specificity refers to the fact that adaption of the change in the fitnes or body is specific to the trainng or physical skill is undertaken.

Specificity is basically what you get is what you do in other words the change in the skill or in the body is depends on the actiity one is want to improve. Suppose  arunner who want to improve its ability to run faster is to run faster need to improve the activity of running.

i am in 8th grade and my period started in 5th grade

they won't be regular for a while

dont freak out

mine still arent regular either

make sure u tell ur mom this too

also keep a calendar with every specific detail of your period

if u have any questions ask