Pumping Iron

Have a look at how the shape of Larry Scott’s biceps appears to change with time.

There is an opinion in the bodybuilding world that it is possible to emphasis certain parts of a muscle, e.g., dividing the chest into upper/lower/outer/inner, biceps into inner and outer head, triceps into 3 segments etc. This is accomplished by exercise selection or making tweaks in the manner one performs certain exercises. While one cannot develop longer biceps, it may be possible to develop the lower portions of the biceps to give the appearance of longer biceps. This would be achieved by performing exercises that put stress on the biceps in the stretched position like preacher curls. However, changes take a long time.