Shrinking.

[Dariuschua]

Guys , i do not know why , i arms shrinked like 1 inch last week and it was like 2 days after my workout . And i stopped my supplement 1-2 weeks ago . I was using amino acids as supplement .

 

[Totentanz]

Most likely glycogen depletion. Carb up, make sure you are getting enough water. It is not possible to lose enough muscle in one week to lose 1 whole inch on your arms. So it's most likely fluid loss.