The vast majority of injuries are due to improper form. Spend time learning the basic compound movements properly. There are countless sources of instructional words of wisdom and video on the internet but they can't beat having an educated trainer walk through the motion(s). Starting off right will not only improve progression, it will prevent injury.
That’s it for Basic Strength and Muscle. Novices and casual exercisers can expect a 20-40 percent increase in strength and some muscle size and muscle endurance enhancement. You could continue with this program beyond the 18 weeks by increasing the weight load as strength and capability improves. However, further progress may depend on alterations in exercise variety, frequency and timing. The next phase should be an intermediate program designed to enhance the progress you’ve already made.
Of course, no one was born pressing 500 pounds or squatting 700 pounds – it takes time to build this kind of strength. Assuming your form/technique is in place, you'll want to incorporate some low reps and heavy weights into your program. For example, do 10 sets of squats for 3-4 reps each, or 8 sets of 5. In other words, in order to build strength, keep your weight heavy and use low reps for a high number of sets. Squatting your bodyweight is a bare-minimum requirement for a beginner (or twice your bodyweight for an intermediate-level lifter).
You will have to bid adieu to your favourite processed and fried foods as a part of your bodybuilding program. Consume five or six small meals each day with lean protein to repair muscles, carbs to fire your workouts and healthy fats to meet hunger. It is advisable that you create meal plans for your week. You should also rest your muscles for a full 48 hours before working the same muscle group and get plenty of sleep.
I will do a video on deadlifts soon. It’s funny you mention that because most people have the opposite issue, their back takes over for weak legs and they aren’t sitting in the position low enough to begin with. You sound like you have great leg strength but your back isn’t engaging enough. You may want to try pre-exhausting your back first with a few high rep sets of hyper-extensions w/ just bodyweight, THEN go to deadlifts
The squat is performed by squatting down with a weight held across the upper back under neck and standing up straight again. This is a compound exercise that also involves the glutes (buttocks) and, to a lesser extent, the hamstrings, calves, and the lower back. Lifting belts are sometimes used to help support the lower back. The freeweight squat is one of 'The Big Three' powerlifting exercises, along with the deadlift and the bench press.
The motor proteins actin and myosin generate the forces exerted by contracting muscles. Current recommendations suggest that bodybuilders should consume 25–30% of protein per total calorie intake to further their goal of maintaining and improving their body composition. This is a widely debated topic, with many arguing that 1 gram of protein per pound of body weight per day is ideal, some suggesting that less is sufficient, while others recommending 1.5, 2, or more. It is believed that protein needs to be consumed frequently throughout the day, especially during/after a workout, and before sleep. There is also some debate concerning the best type of protein to take. Chicken, turkey, beef, pork, fish, eggs and dairy foods are high in protein, as are some nuts, seeds, beans, and lentils. Casein or whey are often used to supplement the diet with additional protein. Whey protein is the type of protein contained in many popular brands of protein supplements and is preferred by many bodybuilders because of its high Biological Value (BV) and quick absorption rates. Whey protein also has a bigger effect than casein on insulin levels, triggering about double the amount of insulin release. That effect is somewhat overcome by combining casein and whey. Bodybuilders are usually thought to require protein with a higher BV than that of soy, which is additionally avoided due to its claimed estrogenic properties. Still, some nutrition experts believe that soy, flax seeds and many other plants that contain the weak estrogen-like compounds or phytoestrogens, can be used beneficially, as phytoestrogens compete with estrogens for receptor sites in the male body and can block its actions. This can also include some inhibition of pituitary functions while stimulating the P450 system (the system that eliminates hormones, drugs and metabolic waste product from the body) in the liver to more actively process and excrete excess estrogen. Cortisol decreases amino acid uptake by muscle, and inhibits protein synthesis.
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.