The McGill Big 3: Three Exercises for a Stronger, Pain-Resilient Back

If you have ever searched for safe core exercises for back pain, you have probably come across the McGill Big 3. Developed by spine researcher Professor Stuart McGill, these three movements are designed to build endurance and stability around your spine without the repeated bending that often provokes low back pain.

Why these three exercises?

Traditional sit-ups repeatedly flex the spine, which can irritate sensitive structures in people with back pain. The Big 3 take a different approach: they train the muscles that brace and protect your spine while keeping it in a neutral, comfortable position. The goal is a stable, resilient torso you can rely on during everyday movement.

1. The curl-up

Lie on your back with one knee bent and the other leg straight. Place your hands under the small of your back to keep your spine neutral. Gently lift your head and shoulders a short distance off the floor without bending your neck or flattening your back. Hold briefly, then lower. The movement is small and controlled — this is about endurance, not crunches.

2. The side bridge (side plank)

Lie on your side, supported on your forearm, and lift your hips so your body forms a straight line. Beginners can keep the knees bent on the floor; more advanced versions are performed on the feet. The side bridge trains the muscles along the side of your trunk that are essential for spine stability.

3. The bird-dog

On your hands and knees, extend one arm forward and the opposite leg backward while keeping your back flat and still. Hold briefly, return, and switch sides. The bird-dog challenges your ability to keep the spine steady while the limbs move — exactly what daily life demands.

How to build it into a routine

McGill recommends short, repeated holds rather than long ones, and doing the Big 3 most days. Quality and a neutral spine matter far more than the number of repetitions. Many people find it helpful to do them in the late morning rather than first thing after waking, when the discs are more hydrated.

Learn the method properly

The Big 3 are most effective as part of the wider McGill Method. The clearest guide for patients is Back Mechanic by Stuart McGill — a step-by-step, plain-language book also available as a video-enhanced edition so you can watch each exercise. Clinicians and serious readers may prefer the in-depth reference Low Back Disorders, while Gift of Injury applies the same principles to heavy training. Browse the full range in our books collection.

This article is for general education and is not medical advice. If you have severe, persistent or worsening back pain, or pain with numbness, weakness or other symptoms, please consult a qualified healthcare professional before starting any exercise programme.