Strength exercises beneficial for improving posture include planks, rows, and deadlifts. These exercises target core stability, upper back strength, and lower body alignment, contributing to a balanced posture. Planks engage the core muscles, helping support the spine, while rows strengthen upper back muscles, counteracting forward shoulder posture associated with sitting. Deadlifts engage multiple muscle groups while promoting proper spinal alignment. Incorporating these exercises into a routine can prevent common postural issues and enhance overall body mechanics.