Yeah, um, don't do that. Stick to the program. Take the 30 or 45 minutes or whatever you were spending doing unnecessary extra work and spend that same time prepping food for the next few days. Grill some meat, boil some eggs, bake some potatoes, make a few sandwiches, whatever.
Re-read the article, especially the section pictured above. You're not improving the plan by adding anything, especially shrugs, calves, and abs.
At your size, you're in a good position to grow if you simply do the program and eat plenty.