Can anyone Help? Which of the following is a guideline for isometric training?
A.
Hold each stretch 7-15 seconds.
B.
Do not perform isometric stretches before a competition or even.
C.
You should never feel pain during isometric training.
D.
All of the above

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d

the answer is : )