There are many benefits to improving your core strength - better balance and efficient movement patterns which improve overall strength for sports performance as well as injury prevention and rehabilitation of old injuries. When discussing the core, it is important to note that the core is more than just your abdominal muscles. Your core is the trunk of the body - the shoulder girdle to the hip girdle. Training the core to engage as one unit can change the way you feel and perform. Here are four exercises that can be performed in 5 minutes every day to help strengthen your core in 4 weeks. Perform each exercise for one minute.