I used mri black powder today and it did nothing for me. i couldnt squat or bench at all.?

My legs and body had been very sore all week. ive heard only good things about it but it did nothing my first day. is it just me or will it kick in my next time?I used mri black powder today and it did nothing for me. i couldnt squat or bench at all.?
It may be a piece of junk man.

blushed