Muscle the four principles of exercise

Aerobics training "set of principles" that each muscle group should do four different sets of exercises. You are free to choose which four kinds of exercises, we should pay attention to is: each focus on different exercises. The first group practice to use more weight to increase strength, can practice four times; The second group practice with the weight of smaller, more frequency (8), for the growth of muscle volume; The third group practicing the weight should be smaller, used to enhance muscle endurance, the number should be more, to 12; Finally a group of exercises should be used to consolidate small weight training effect, stimulating the secretion of hormones by muscle can be done to repeat 16 times.
The "four principles" to the greatest extent possible and enhance muscle strength. Size and endurance, fitness enthusiasts to determine their own training programmes can be used as an important reference.