Your core muscles are rarely the primary movers in athletic performance. Despite their "complementary" role, they can be extremely important in how effectively you express strength. These muscles stabilize the whole torso and allow you to efficiently transfer force produced in an athletic movement. Unfortunately, the lower back (one muscle group of the core) is often neglected. This is in contrast to abdominal muscles, which people will often target significantly more than the lower back. If you want a strong/balanced core, give these lower back exercises and stretches a shot! We're sure you'll see massive improvements in your overall performance!