When most people think about power training, they think of massive overinflated body builders glistening with fake tan shaping up in front of a mirror. However power training is about a lot more than that, and is important for people of all ages.
One thing people often get confused about is the difference between power and strength. Strength is the amount of force you can produce (i.e. how much weight can you lift) whereas power includes the element of speed (i.e how fast can you lift/push/pull it).