The document discusses core strength and balance. It defines the core as including the abdominals, hip flexors, quads, hamstrings, glutes, and low back. Imbalances in the core are often due to poor posture, mechanics, and stretching over time. Exercises should target both the front and back of the core with a balance of anterior and posterior exercises to correct imbalances and prevent injuries. Maintaining a neutral spine is important for proper functioning.