What is hypertrophy?
Hypertrophy is the increase in size of the muscle cells.
That’s right, this is what you’re looking for! Muscle growth occurs when muscles grow larger and stronger. This makes them able to do more work than they could before (or at least feel like they are). Hypertrophy isn’t just a matter of getting bigger, it also means that your strength will increase because each muscle contains more fibers and thus has more capacity for activity. In addition, endurance also improves because your body can work longer without getting tired or fatigued as quickly as before.
Is heavier always better?

Is it always better to use heavier weights? The answer is no, but you’re probably not going to be satisfied with a straight-up “no.”
Let’s say you want to do 12 reps of an exercise. You could use a lighter weight and do those 12 reps in one set. Or you could use a heavier weight and only lift it for 10 reps (that’s 2 extra sets). You can also start with lighter weight and then increase the intensity over time by adding sets or reducing rest periods between sets. And if your goal is more muscle building than just strength gains, then using high-rep sets will help you build endurance in addition to muscle mass—although this kind of training may be too intense for beginners who are new to these exercises or aren’t yet accustomed to working out without being exhausted after every single session!
How many sets and reps should you do?
So, how many sets and reps should you do? The answer is: it depends. It depends on your goals, your fitness level and experience, and your ability to recover from workouts.
When training for muscle growth, the number of repetitions (reps) you do can vary between 8-12 and the number of sets per muscle group can vary between 3-5.
You’ll want to rest 1-2 minutes in between each set so that you don’t overtrain and fatigue yourself out too quickly.
How long should you rest between sets?

Most people seem to think that resting for about one minute between sets will give them ample time to recover and get ready for the next set. This is true in many cases, but not all of them. If you’re doing a lift heavy enough to really tax your body, like squats or deads, you need more time than just 60 seconds of rest before going back at it again.
If you’re new to weightlifting and haven’t been working out much before starting this regimen, then don’t worry about how long your rest periods are—take as long as you need! Just remember that the longer your rest period is, the less fatigue will affect your performance on subsequent sets; conversely if you take shorter breaks between sets then any tiredness will impact every repetition which could negatively affect progress.
Partial reps vs. full-range of motion

Partial reps are better for hypertrophy, and full-range of motion is better for strength. Let’s break this down:
Partial reps allow you to use more weight, which translates into greater muscle growth. Full-range of motion (or “going through the full range of motion”) has no effect on strength or size if you’re using light weights, but when you start increasing your load, going through the full range becomes more important for building strength because it allows you to use more weight.
How much hypertrophy can you expect?

You can expect to gain about 1 pound of muscle per month, but this will depend on your age and experience lifting weights. For example, a 25 year old newbie who starts lifting weights for the first time could easily gain 2 pounds of muscle per month. By contrast, a 55 year old experienced lifter will only be able to gain about 0.5 pounds of muscle per month.
Muscle growth is also dependent on how much you lift, what exercises you do (or don’t do), and how often you train each week—so keep track! It’s easy to look at yourself in the mirror every day and tell yourself “I’m getting bigger,” but it’s harder to quantify that change over time by tracking other factors like body fat percentage or strength levels.
Can all muscle fibers be stimulated to grow?

My muscles are a lot like the Teenage Mutant Ninja Turtles. They’re all named after the same thing and they can’t be separated from each other, but some of them are more responsive to growth stimulation than others.
One day you may want to work your biceps (the “long” head) with an exercise that isolates it from your triceps (the “short” head). Another day, though, you might want to use an exercise that involves both arms at once: for example, bench pressing uses both arms together but focuses on one side of the chest at a time.
Can you isolate different muscle fibers in the same workout?

The answer, my friend, is no. You cannot isolate different muscle fibers in the same workout. You can, however, isolate different muscle fibers in different workouts, or exercises within those workouts. This is because your body uses a variety of muscles during each exercise (which makes sense because we’re all human beings and can’t just build up one muscle at a time).
While you may be able to isolate certain areas of your body by doing multiple sets of various exercises—for example, putting more weight on your shoulders during shoulder presses than on your biceps when curling—you cannot send signals directly to specific portions of the target muscle without causing damage and injury to other parts of that area (like a bad shrapnel wound).
You might want to think twice before doing your heavy lifts.

You might want to think twice before doing your heavy lifts.
You see, the idea that you need to do heavy lifts in order to build muscle is the most common misconception in fitness today. This is because a lot of people believe that lifting heavy weights will help build muscle and get them stronger. That’s not entirely false—heavy weights will definitely help build strength—but it doesn’t mean they’re necessarily the best way to add size and density to your physique.
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