J JerseyMom Well-known member Jul 27, 2010 #1 I get the back vibrations a lot, especially when I'm tired. The fact that you can lift weights for 30 minutes proves there's nothing "weak" about your muscles! That's fantastic!
I get the back vibrations a lot, especially when I'm tired. The fact that you can lift weights for 30 minutes proves there's nothing "weak" about your muscles! That's fantastic!
