How to Use McGill’s Big Three for Back Pain

TL;DR

Assessment should determine whether the modified curl-up, side plank, and bird dog match a person’s specific back-pain mechanism. These exercises aim to create torso stiffness while limiting spinal load, improving force transfer and sometimes temporarily reducing pain. Repeated 10-second holds with sound form are favored over prolonged efforts that produce fatigue and technique breakdown.

Transcript

Let's talk about those three exercises, Stuart. There are three exercises. Um, there's two of them that I've done consistently for quite some time. I really uh fancy them a bit. Um, the the the third one, the bird dog, I I only do occasionally. Um, but let's go through the three of them. And um, is it safe to say that that you and and just for the ... Read More

Key Insights

• The McGill Big Three are not appropriate for every person because back pain can arise from different mechanisms. McGill rejects the idea that everybody should perform them automatically and argues that an individual assessment must guide whether stability training is the appropriate solution.
• Core stiffness is a foundation for efficient movement because it prevents the torso from collapsing while limb muscles generate force. McGill describes unwanted collapse within the body’s linked segments as an energy leak that reduces how effectively force is directed toward a push, punch, or other movement.
• The modified curl-up is designed to challenge the abdominal muscles without reproducing painful low-back flexion. A person places the hands beneath the low back, lifts the elbows, and slightly raises the head, neck, and shoulders while preserving the posture identified as tolerable during assessment.
• The side plank is relatively spine sparing because it heavily challenges the muscles on the lower side while the upper side contributes less. McGill says this arrangement produces about half the spinal load associated with exercises that heavily recruit more of the torso musculature at once.
• The bird dog develops crossed muscular coordination by extending one leg and the opposite arm. This activates one side of the lower back and the opposite side of the upper back while teaching the brain to separate shoulder and hip motion from unwanted movement through the spine.
• Repeated 10-second holds build endurance while protecting exercise quality. McGill favors repeated exposures and a descending pyramid because prolonged holds can cause physical and neural fatigue, reduce the tolerable training level, and allow technique to deteriorate as the person becomes tired.
• The Big Three can create residual torso stiffness after a single session. McGill attributes this temporary effect to lasting neural stiffness rather than a structural change in muscle, with the effect lasting about 20 minutes in some people and longer in others.
• Temporary pain relief can guide how the exercises are scheduled. McGill notes that some patients report less pain for the next hour after performing the Big Three, so a 12-minute session in midmorning and another in midafternoon may help gradually reduce their symptoms.

Questions & Answers

Q: What are the McGill Big Three exercises for back pain?

The McGill Big Three consist of the modified curl-up, side plank, and bird dog. They were selected after years of testing abdominal, back, twisting, pressing, and throwing exercises. McGill says these three repeatedly performed well because they create torso stiffness and stability while limiting spinal load, an important consideration when exercising people who are already experiencing back pain.

Q: Should everyone perform the McGill Big Three?

The McGill Big Three should not automatically be prescribed to everyone. McGill says some people are already too stiff, while others have back pain caused by a mechanism that these exercises do not address. He emphasizes that assessment must lead to the solution. The exercises are useful only when the person’s symptoms and movement characteristics indicate that stability training is appropriate.

Q: How does core stiffness improve movement and performance?

Core stiffness stabilizes the torso so force generated by muscles can move the limbs rather than collapse the body’s linked segments. McGill compares this function to a backhoe lowering stabilizer bars before digging. With a firm proximal base, force is directed outward more efficiently. He also says greater stiffness can help athletes run, cut, and change direction slightly faster.

Q: How is the modified curl-up performed for back pain?

The modified curl-up begins with the person lying on the ground and placing the hands beneath the low back to preserve its posture. The elbows are lifted, followed by a small hovering movement of the head, neck, and shoulders. The exercise is intended to produce an abdominal contraction without flattening the back into a position that assessment has identified as a pain trigger.

Q: Why is the side plank considered spine sparing?

The side plank is considered spine sparing because only half of the torso musculature is heavily challenged at a time. The muscles on the lower side work strongly, while those on the upper side are less heavily loaded. McGill says this creates only half the spinal load and provides a tolerable way to train side-core stability in people with back pain.

Q: What does the bird dog exercise train?

The bird dog trains torso stiffness, stability, and coordinated movement between opposite limbs. Extending one leg and the opposite arm activates one side of the lower back and the opposite side of the upper back, creating a crossed pattern. It also teaches the brain to separate motion at the shoulder and hip joints from unnecessary movement through the spine.

Q: Why does McGill recommend 10-second exercise holds?

McGill recommends repeated 10-second holds because they build endurance without pushing the person to the point where fatigue causes form to break down. He connects this approach to a Russian descending pyramid structure. Compared with prolonged efforts, repeated short exposures also reduce neural fatigue and allow the person to achieve a higher tolerable amount of stability training.

Q: How long can the effects of the McGill Big Three last?

The McGill Big Three can produce residual torso stiffness after a single session. McGill says this stiffness lasts about 20 minutes in some people and longer in others, and he believes the brain creates the lasting neural effect. Some patients report pain relief for the next hour, which may support scheduling separate 12-minute sessions in midmorning and midafternoon.

Summary & Key Takeaways

• The McGill Big Three are the modified curl-up, side plank, and bird dog, but they are not universal exercises for everyone. McGill argues that an assessment must identify the posture or movement provoking symptoms before exercise selection. People whose pain mechanism is unrelated to insufficient stability may require a different solution.

• Core stiffness supports efficient force transfer through the body’s linked segments. Without proximal torso stiffness, a contracting muscle can collapse part of the linkage and create an energy leak instead of directing motion outward. The Big Three emerged from testing because they combined reliable stiffness with relatively low spinal loading for people experiencing pain.

• The modified curl-up preserves the low-back posture, the side plank challenges one side of the torso, and the bird dog coordinates opposite limbs while developing stability. McGill recommends repeated 10-second intervals to build endurance without losing form. The resulting neural stiffness may persist temporarily, sometimes reducing pain and supporting faster directional changes.