Today was my upper body day and I was doing bicep curls 8/8/10 at 30 lbs. I'm on my third set and try to do my 7th rep. I get the dumbell half way up and it sticks so I put everything into lifting it up and my arm goes down. It's like my arm just gave up on me. What is this/why does it happen? Keep in mind I'm new to weight lifting altogether.
ur not a machine bro ur muscles get tired/give up. today was my bench day I did a 8x4. After my last rep i wanted to push one more just to see and i just couldnt... i was just too tired.
Lifting is my life
I am 15
@ 155 lbs
That sounds like a phenomenon known as failure. Basically, you pushed your muscles to the point where they could not perform another rep.
You'll get used to it as you lift more, your muscles just quit, you hit the "I'm done" wall.
Give chalk a chance.
49 years old