This video analyzes a new study comparing the effectiveness of different biceps exercises, specifically cable bicep curls (shoulder extended) versus preacher curls (shoulder flexed). The speaker discusses whether the position of the shoulder during the curl impacts biceps growth and examines other relevant research to draw conclusions.
The video mentions two studies on exercise variety for biceps growth.
The first study involved untrained men training three times a week for eight weeks. One group used the same exercises each day (only one isolation biceps exercise), while another group varied their exercises across the three days (incline curls, standing barbell curls, and cable preacher curls). Biceps growth in the 50% region tended to be better with the variation group. The speaker speculated that the incline curls may have contributed to this.
The second study used a small sample of well-trained individuals. One arm trained with six sets of cable bicep curls per session, while the other arm trained with three sets of cable bicep curls and three sets of preacher curls. There were no clear differences in elbow flexor growth, although some measures leaned slightly towards the group that trained entirely with cable bicep curls.
