https://khanhtrinhvn.com - Some exercises can aggravate back pain and should be avoided when you have acute low back pain. Partial crunches can help strengthen your back and stomach muscles. Lie with knees bent and feet flat on the floor. Cross arms over your chest or put hands behind your neck. Tighten stomach muscles and raise your shoulders off the floor. Breathe out as you raise your shoulders. Don't lead with your elbows or use arms to pull your neck off the floor. Hold for a second, then slowly lower back down. Repeat 8 to 12 times. Proper form prevents excessive stress on your low back. Your feet, tailbone, and lower back should remain in contact with the mat at all times.