300 push ups 20 day challange ?

If you're looking to maintain muscle or even bulk up you should aim to increase your protein intake to around 1.5g + per lb of bodyweight. If you'd like to see a change in composition, then lower your carb ratio.

Low carb, medium to high protein, and high fat.

Not only will you see a change in muscle shape and size you will see a reduction in body fat.

Rest time - if you're feeling DOM's (delayed onset of muscle soreness) 48hours is recommended before training that body part again. Every 4 - 6 weeks, take a full 5 - 7 days off from training and focus heavily on nutrition.

Any questions boys and girls don't be too shy to ask me, I'm a qualified Personal Trainer and I work for one of the largest health clubs in the country

I am doing more difficult 5 finger style push ups. Ones that will allow you to build strength to rip out the eyes of your opponent/enemy or someone who wants to do you in. I'll work this in my 2 fingertip push up routine soon.