seated tricep ext machine mod for proximal tricep region bias
The underlying concept at work here is that it allows your elbows to start the movement from behind your back instead of infront which is more aligned with humerus extension. Its a subtle change but the mechanics are better and more similiar to a db kickback then a front dip/ext. No one likes db kickbacks because they require an immense effort from your upper back to stabilize the elbow so Ive been trying to curve that issue. This is my attempt to negate that considering you can reset each time at the beginning of the ROM while maintaining humerus extension. Obviously its not a true isolated tricep extension but the reality is that nothing else is either. Overhead tricep extension is the closest you can get but it demands a lot from the distal fibers at the beginning of the movement and leads to shoulder impingements.
For clarity go look at how a reverse plank works to understand my objective here.