Does age also affect kicking strength?

As you get older, your muscle mass tends to decline, you start to have gait (walking) problems, stiffening and reducing your mobility. It is possible for your muscle mass to decrease by up to 50% between 30 years of age and "old age" (around 65). It is, therefore, generally true that the loss of muscle mass as you age causes your strength to lessen.

It is, however, possible to keep your strength even at an old age. By regularly exercising yourself, your muscles will become more stimulated and will tend to grow (certainly more useful than being inactive).