Most skinny guys dramatically overestimate how much they're actually consuming. You're going to need hard numbers to make sure you stay on track. You don't need to go crazy and count every macronutrient as if you were dieting, but you do need to roughly measure portion sizes, track overall calories, and at least account for everything you do or don't eat.
The journal is the " facts" of your training and it cannot lie to you unless you write down the information incorrectly! It is pretty simple... if last week you did 100 lbs for 8 reps then this week you either need to do 9 reps or up the weight by 1-5 pounds. I know it sounds too simple, but if you do this long enough you will attain whatever goals you set for yourself.
This is not the type of principle that you use at the end of the final set of an exercise. For example, if using this principle for training your Thighs, you first do a set of Leg Extensions, reach failure, and then move to Squats with no rest. After Squats, rest for the prescribed amount of time and repeat the process for the required amount of sets. Note that you will need to reduce the weight that you normally use in the squats in order to use this principle or otherwise you will end up making a scene at the gym.
Other bodybuilders, such as Casey Viator and Mike Mentzer, used less sets in order to get more recuperation. They would limit the number of sets per exercise to only 3 and would also do less exercises to train each muscle group. This would bring their total number of sets down to 10-12, about half of what the high volume trainers would use. Mentzer was often quoted as only doing a total of 5 sets per muscle group.
Shorter rest periods have their place — especially if your goal is muscular endurance and fat loss. But longer rest allows you to perform more reps on subsequent sets, and this greater volume, over time, may lead to greater muscle gains in the long run. One convenient way to do this without tacking additional time onto your bodybuilding routine: Perform supersets, which are back-to-back sets of two different exercises that target non-competing muscle groups (e.g., the squat and biceps curl, or the bench press and bent over row).
“The stimulus to put on muscle that won’t be beneficial for running is much higher than people realize, and unless you’re either lifting relatively heavy and frequently and/or eating a hyper caloric diet, you’re unlikely to put on muscle,” says Joe Holder, USATF-certified running coach, Nike+ Run Club coach in New York City. “Just think about strength training one to two times a week, focusing on compound movement patterns, such as a lunge or squat, and shoring up the areas that could lead to increased injury if they are weak, like the hips.”
Major variants: reverse ~ (curling the pelvis towards the shoulders), twisting ~ or side ~ (lifting one shoulder at a time; emphasis is on the obliques), cable ~ (pulling down on a cable machine while kneeling), sit-up ~ (have [chest] touch your knees), vertical crunch (propping up to dangle legs and pulling knees to the [ chest] or keeping legs straight and pulling up legs to a 90 degree position). Reverse hanging crunch (using gravity boots or slings to hang head down and pulling to a 90 or 180 degree form)
Arnold wrote that he always included at least one dumbbell movement in his routine. By supinating his hand (turning it upward as he curled), he felt he got a greater "peaking" effect because the brachialis is recruited into the motion when the hand starts in the neutral position. Arnold performed supinating dumbbell curls simultaneously and with alternating reps. The latter allows more body English and a bit of rest between reps.
JDB, great tip on cardio before weights. Having trained in a boxing gym for years, this is exactly how I would start each training session, even if I was going to focus on weights that day. Use to start off, 3-4 rounds on jump rope in the ring, alternating between fast high knees and then slowing it down. It was all continuous for about 10-12 minutes. Would then continue w basic calisthenics (mountain climbers, bw squats, burpees, etc.) for another 3-4 rounds. This was all done w boxing timer running in background. Would finish “warm-up” w some kind of pull-up/chin-up, dips, and hanging abdominal work. Then it was time for weights. This just overall improved my general conditioning/movement and never felt that my strength diminished when doing this. Actually, felt stronger due to increased blood flow.