First of all, there is just enough weight to the cue to test the muscles of the hand, as it does, bringing a little resistance into play, while the exercise that "taking aim" affords is excellent.
To start off with, the cue is hidden in the right hand with the thumb and three or four fingers; then in order to balance your cue before making a shot, the muscles of the wrist become fixed. While the left hand rests upon the table the passing of the taper end of the cue between the thumb and finger creates a slight strain upon the muscles of the left arm, so that the continued lifting and placing of the hand has the same effect on the left that the shooting has upon the right hand.
Again, a woman in stretching her arms far over a table to make a shot gives a very necessary exercise to the muscles of the waist, and to prove that it is an exercise she seldom takes, a novice will experience considerable lameness; after her first two or three games of billiards, but this soon disappears.
The movement necessary to this stroke is excellent for her shoulders, and completes a combination of movements seldom found in any other physical exercise.—Family Doctor.