Final answer:
Balance is a skill-related concept that enhances core training by maintaining stability and form, flexibility allows for a greater range of motion, and strength training fortifies core muscles.
Step-by-step explanation:
A skill-related concept that would enhance core training is balance. Balance is essential for core exercises because it helps to maintain stability and proper form, leading to more effective workouts and reducing the risk of injury. It involves the body's ability to maintain its center of gravity within its base of support. Exercises that improve balance, such as those performed on unstable surfaces or that require standing on one leg, can significantly increase core strength and stability.
Flexibility is also beneficial for core training as it allows for a greater range of motion, enabling you to perform exercises with proper technique. Increased flexibility can be achieved through stretching and is closely related to the reduction of injury risk. Furthermore, strength training is a critical part of core development. Strength exercises, like planking or using resistance, fortify the core muscles leading to enhanced performance in various physical activities.