Bench press however would. Heavy axial loading should be conducted in early adulthood to maximize peoples peak bone mineral density, and minimize effect of bone mineral loss in late adulthood. Since bones and connective tissues respond to forces that threaten the supporting structures, one should practice progressive overload. Progressively increasing the loads results in progressive growth in the bones, and hence, greater peak density. In order to stimulate as much bone modeling as possible, in as many bones as possible, you need to vary the loads.
Variation also ensures more bones are exposed to forces and hence adapt with new bone growth.
Makes sense since the bone has to feel a need to strengthen itself to next time better, and more safely handle the load. Direction of Forces - As mentioned above, varying the normal pattern of loading with new exercises, or variations of an exercise, stimulate more overall bone growth. Volume of Loading - Volume has an inverse relationship with intensity, i.e. high intensity usually means low volume and vice versa. And I've already said that high intensity is important for bone remodeling, so volume tends to be lower. We can definitely say that there is an upper limit of volume where any more repetitions don't provide any additional stimulus for growth.