[BenReilly]

Originally Posted by Shaolinkiwi

1. Not training legs
2. Too many isolation exercises in their routine, not enough compounds
3. Diet
4. Improper form, just jumping into exercises without guidance / understanding i.e. deadlift form
5. Progressing too much too soon and doing yourself an injury - Leave your ego at the door.

Originally Posted by Grim83

1. form
2. thinking that leg presses compare to the squat
3. only doing extensions and curls
4. not mixing the reps
5. form

here's my 10