To perform a Concentration Kick, you normally find something to hold onto or lean against, such as a bar or wall. You usually keep the base leg in its correct position throughout the kick. For example, if you were doing Side Kicks in a concentration style, the base foot would be pointed toward the wall. Then the kicking leg should move slowly through the kicking motion, often pausing at full extension in order to build strength. Concentration Kicks are repeated in sets, as a form of exercise.