The best exercise for lower back pain is the bridge exercise. This exercise targets the muscles in your lower back, hips, and glutes, providing strength and stability to the area. To perform this exercise, lie flat on your back with your knees bent and your feet flat on the floor. Slowly lift your hips off the ground, while keeping your shoulders and feet on the floor. Hold this position for a few seconds and then lower your hips back down. Repeat this exercise for 10-15 repetitions, gradually increasing the number of repetitions and duration as you build strength. Remember to engage your core and breathe throughout the exercise. It is important to start slowly and listen to your body, stopping if you experience any pain or discomfort.