Now comes the next step in the proper development of the arms. The opponents should stand in the same attitude as that employed in the wrist exercises. This time the opposing forearms are crossed halfway between the wrist and elbow, and the same kind of work is performed. When this has been done two or three times, the antagonists should cross arms at the elbows. Usually, in this work, the arms should be held rigidly straight, but at times it will be found of advantage to "hook" elbows, with the arms somewhat bent. Afterwards try the same exercise with the arms crossed midway between elbow and shoulder. Last of all, "hook" shoulders together, and swing around in the same fashion. Care should be taken not to develop the right arm at the expense of the left. There is another danger in this arm work that must be carefully avoided. The average student finds the lower-arm work more pleasant than the upper-arm work. He will develop magnificent muscles in the lower arms while failing to exercise the upper arms sufficiently for the needs of physique. The Japanese student of jiu-jitsu is taught to keep hard at work
