But, I think more important is the fact that you are going right up to failure every time you do this exercise, and are so emotionally hung up on your reps. Everyone has an exercise that they are prone to get too emotional about. One exercise that they base some of their "self image" on, or base an inapropriate amount of their feelings of going forward or backward in training on.
You have to fight that shit, and fight it hard. The more you can divorce emotion from the training process, the better. Training is a process of loading the body a certain amount that causes an adaptation to that load. It is not a process of coming to the gym and proving how strong you are or proving that you have not lost strength or muscle, etc.
I don't have a problem with this when I lift because for me lifting is just fun. But jumping is another story. I hate not being able to jump as well as I want and that's bad news. Need to remind myself of this quote when I start jumping again in earnest. I get so pissed at myself for jumping poorly and that is such a stupid cycle to be in. Training is about getting better a little bit at a time.
definitely.. when i get too into jumping i always get pissed at my performance, but the last few months whenever that happens, i just focus on distance running/sprints/something else to get that shit out of my mind.. it's annoying and stupid to get all bent out of shape over jumps or any exercise, because instead of helping it actually makes you perform worse.. but at the same time, there still needs to be some progress, but that can come from many factors, such as getting stronger in trap bar dl/squat etc.. if you're improving hollistically, then eventually you have more ability to improve your main goal, but you don't beat yourself into the ground as much, that's for sure.
if anyone gets depressed over 'jumping' or 'performance' it's me.. breaking out of that was hard, i'm a training addict.. that's why having tons of goals instead of just one, makes everything alot better for me. such as yesterday, i jumped shitty, then ran 7 miles, and felt great because of that distance work, feel even better today
peace man