No matter what kind of curl you do, it basically will do the same thing, which is to bring your lower arm up to your upper arm by way of an arc. That amounts to one angle. Sure you can do several different curl movements but again..... they do the same mechanical thing and follow the same arc. Whether it be preachers or inclines or standing barbell or alternate dumbell or hammers or cross body......they follow the same arc, hence the same angle. A curl is a curl is a curl. We all have our own individual favorites. The only significant change one can make is the position of the wrist. Palms up, EZ curl, hammers, palms down, supinating, etc. and these wrist positions will affect the forearm / bicep involvment to a less forearm or more bicep or vica versa degree......but its always the same angle..........an arc
Pump on .....