Flexibility and mobility measure range of motion, and when trained optimally, allow us to use force to a greater degree so that we can accomplish more with whatever we are aiming to achieve. 

Power is the product of speed and strength. As we age, power becomes a much more essential aspect of training because it is reduced drastically upon developing a more sedentary lifestyle naturally with age. 

Strength and hypertrophy are measures of muscular function and size. If your goals are to lift the highest possible amount of weight or to simply appear healthier, these are the components for you. 

Recovery becomes an essential piece to any training program especially when training several times a week. Cooldown stretching, massages, and hot/cold therapy are all great ways to be ready for that next session.