BE LAZY EVERYONE

I don't work out but I agree with you

Same with me. Its really annoying.

I have been having the same problem but the last half year I've finally made some progress by eating a lot more protein (eggs, nuts, grilled cheese) but what I think helped me the most is drinking chocolate milk every night because, it has lots of protein, you don't need to be hungry, it helps you sleep better which helps to buildt muscle and at night you body takes in more calories and stores it away. For excersise try cycling or swiming. It targets more than one muscle group, you can do it whit others and it's relatively injury free. But most inportantly don't give up. It takes 3 or 4 weeks to gain 1 kilo/2 pounds. So hang in there. If I can do it so can you.

Protein, just like what ahvr said. People sometimes make the mistake by thinking that you can just build muscles by lifting weights alone.

Actually it was doing muscle ups and is common for that exercise, but thanks for the input

Do you mean pull ups? And you can't sprain bones, buddy. You probably sprained the tendons. Good stretching before exercise should prevent that :)