In my experience, maneuvers that require a switch in stance can generate a lot of energy by utilizing the rotational muscles in the legs and core. Leading a switch maneuver in to an attack like a straight punch, cross, elbow, hook or a round house kick will further generate more energy.
I have spent a lot of time training the concept and I've arrived at a few fundamental conclusions. There is a ratio of energy input into muscles which corresponds to the size and function of the muscle. You can train the maneuver via mediation whereby you focus your muscles (flex) to the point of tension just before motion is generated.
If you hold your limbs in the center of their range of motion and slowly increase the amount of tension being applied, it will train the first few stages (for lack of a better term) of the muscle's activation, which starts off as a sugar being burned.
Muscles doing what muscles do starts genetically with the warping of a DNA strand which binds chemicals and forces molecules closer together.
This image is the 3rd stage in a muscle's contraction in which the bio-chemical processes have already happened and the cellular structure of the muscle is starting to contract.
Now about the misconception of power; training in this manner via mediation greatly increases reaction speed. Many people misconstrue weight and mass with power, but "power", as it were, is mass moving at a velocity. Literally a fractional e=mc2 equation (energy = mass x the speed of light squared).
I like to think about it like DragonBall. Carry weight constantly like a backpack full of books; this will train your body to be adaptive to external pressures being applied and strengthen the legs and core in which most internal energy is generated and channelled.
Meditation couldn't be more important; a well trained mediation skill will grant access to the body's "Operation System", which in turn will allow you to utilize all of the muscles in your body to preform tasks more efficiently.
Lastly, the warning no one ever gives; training can cause serious injury, so proceed with caution and care.