The Big 3 for lower back pain are commonly referred to as foundational exercises that can help alleviate and prevent pain in the lower back. These exercises include planks, bird dogs, and side planks. Planks target the core muscles, bird dogs engage the back extensors, and side planks work on lateral stability - all crucial for supporting a healthy lower back. Incorporating these exercises into your routine can contribute to overall spine health and reduce your risk of experiencing lower back pain.