One scenario that's prevalent among strength coaches and personal trainers is crushing large muscles but neglecting to target smaller muscle groups and stabilizers.
For example, most strength coaches now understand the importance of training the hips, since they are pivotal for all sports.
Unfortunately, most of these coaches fail to address foot and ankle mechanics, which greatly short-changes the results they are trying to produce in terms of hip function and power.
Similar issues are seen in the shoulder region and spinal stabilizers.
If any of these smaller areas are weak, undertrained, or neuromuscularly inefficient, this creates a strong likelihood for leaking energy and compromising force transmission, no matter how strong the primary muscle groups are.