I need help I just went to the gym today and I can't even lift a 20lb dumb-bell

[Souljah M]

with my left arm, what happen? I just started back at my gym. last week I did back, shoulders and chest exercises. now this week I can't lift a 20lb weight with my left arm. Im not sore in any way i just can't do it wtf happen to me?? please help??

 

[rocco_girl87]

you could have just tired your muscles, do a less weight and build back up