Doing abs every 15 days and look.

[CowPimp]

Best ab workout 1000 crunches every morning

Best for what goals? Increasing the localized muscular endurance of your rectus abdominus perhaps...

 

[joshp]

What is preventing you from hitting back 100%? Do you have a barbell? Do you have somewhere you can do chinups/pullups? Okay, you can do back 100%.




There are a lot of other factors that culd have lead to your biceps getting weaker. For example, overtraining them, working them less frequently (You hit them twice per week with your preferred split and once per week coupling them with back), eating a less than satisfactory diet, etc.

A pump means dick in terms of gaining mass or strength.

I can't do pullups. It causes pain in my right shoulder. I do back exercises but by 100% I mean I can't hit it hard due to it requiring shoulder usage I have to limit exercise right now.

Every muscle I've ever exhausted gets a pump unless I don't work it hard. I'm pretty sure that if I stop all exercise or don't allow myself to reach a pump while working out I would lose mass and strength. Although I'll never know because I'm too afraid to try this kind of routine.