The 3×3 rule focuses on completing 3 key actions before noon: walking 3,000 steps, drinking one-third of one's daily water intake and consuming 30 grams of protein. It's highly effective because it simplifies movement into small, achievable daily commitments, said Dr Vajalla Shravani, fitness and pilates expert. The 3×3 method builds consistency by focusing on short bouts of intentional movement.