PTG provides hypertrophy training which is an increase and growth of muscle cells. Hypertrophy refers to an increase in muscular size achieved through exercise. When you work out, if you want to tone or improve muscle definition, resistant training is the most common way to increase hypertrophy.
PTG utilizes two types of muscular hypertrophy:
myofibrillar – growth of muscle contraction parts
sarcoplasmic – increased muscle glycogen storage
Which type to focus on depends on your fitness goals. Myofibrillar training will help with strength and speed. Sarcoplasmic growth helps give your body more sustained energy for endurance athletic events.
When weightlifting, you can perform many repetitions (reps) at a lower weight or lift a heavy weight for fewer reps. The way you lift will determine the way your muscles grow and change.
For example, you can develop muscle tone with a lighter weight, but it will require a high number of repetitions to improve efficiency of muscle fibers. Unless you perform a number of repetitions to the point of fatigue, with this workout style you won’t see a lot of muscle definition.
On the other hand, using a heavy weight is an effective way to stimulate growth and definition in muscle fibers. It’s also a more efficient way to work out if you are short on time.
PTG will individualize depending on your needs and goals.