what do you think...now i'm not trying to be criptive about it but if you have doubts yourself that it might be SI than yes it is but if you don't than it's not.
peoples opinions will vary i have a punching bad and i prefer bare fists when i hit it it gets my anger out better and i feel better...do i feel like i'm hurting myself....no do my hands hurt afterwards??,,,,,not anymore if i had them taped up.

you are going to get a lot of different opinions on this one so i would stick with your first instinct in your head