Which of the following is most important when trying to complete a goal
1.set a timeline
2.set the same goal as a friend
3.be flexible about timelines
4.be very general

For a goal you usually want it to be short term especially in the beginning of your goal and very specific so that would rule out number 4. I don’t think it is number two either because you and your friend are two different people with different goals so although it may help to have a friend with you to push you through your goal setting the same goal as your friend isn’t the most important. I believe it would be number one because like I said about number four you want it to be sort term and specific.

The person who utilize the progression principle will keep adding the difficulty of the exercise that he's doing, while the person who does not, will only stay stagnant.  the person that utilize progression principle, will get a stronger endurance because now his body is conditioned to do harsher routines.{the answer was already on verified)