I recently hurt my back and got interested in the anatomy of the lumbar spine and ended up reading the textbook Low Back Disorders by Stuart McGill. McGill is a professor of kinesiology at the University of Waterloo and has spent his ~30 yr research career studying the lower back. It was an informative and surprisingly interesting read! He made the point throughout the book that a lot of "common sense" clinical wisdo…
Is there an appropriate exercise for extending the muscle endurance of the back?
1. Side bridge. Laying on your side, raise the hips up with your weight on your feet and elbow. Hold until failure. This improves the endurance of the lateral musculature.
2. This requires a box with an incline of ~55 degrees. Get in a sit-up position with the back against the incline and with the feet secured to the ground. Have someone pull the box back a few inches. Support yourself as long as possible until any part of your back touches the box. This improves endurance of the flexors.
3. The upper body is cantilevered over the end of a bench or table with the feet secured. The arms are held across the chest with the hands on the opposite shoulders. Failure occurs when the body drops below horizontal.
4. Bird-dog exercise. Starting on your hands and knees, raise one leg and the opposite arm out to horizontal and hold for ~10 seconds at a time.
5. Curl-up. NOT a sit-up. Lie on your back with one leg at 90 degrees and the other flat on the floor. With NO cervical or lumbar flexion, lift your head an inch or two off the floor and hold.