Girls with multiple dumbbell appropriate, this need to see your purpose of fitness, fitness dumbbell movement and your personal basis.
Dumbbell Fitness theory with the RM said a load can do continuous repetitions. Practitioners, for example, of a weight only raised 5 times in a row, then the weight is 5 rm.
In general 1 to 5 rm tended to increase the absolute power, 6-12 rm developed muscle volume, more than 15 rm is muscular endurance training. If you dumbbell fitness purpose is to add muscle, do the dumbbell action every day 8 rm to 12 rm, about 3 to 8 every action; If you dumbbell fitness purpose is to model body, every day to do related rm dumbbell move 15 to 20 rm, every action do 5-6 groups.