Public resource
McGill Big 3
Three core stability and endurance exercises associated with Dr. Stuart McGill’s approach to building back resilience.
The McGill Big 3 are a set of three core stability and endurance exercises developed by spine biomechanist Dr. Stuart McGill to build back resilience and reduce lower back pain.
Recommended routine — Descending Pyramid Scheme
Perform repetitions with 10-second isometric holds using a 5-3-1 pattern:
- 5 reps
- 3 reps
- 1 rep
Rest for 20 to 30 seconds between sets.
Frequency
Do them daily if managing back pain, or about 4 to 6 times a week for general core health and prevention.
Sources
As supplied by the practice — not all sources carry equal evidentiary weight.
Modified Curl-Up
- Lie on your back with one knee bent and one leg straight, placing your hands under your lower back’s natural curve to keep it flat.
- Lift only your head and shoulders a few centimeters off the floor as a single unit without crunching the neck.
- Hold, then lower.
Suggested format 10-second hold · Part of the 5-3-1 descending pyramid — see the routine above.
Side Plank
- Lie on your side with your elbow directly under your shoulder and knees bent at 90 degrees.
- Lift your hips to form a straight line, brace your core, and hold.
Suggested format 10-second hold · Part of the 5-3-1 descending pyramid — see the routine above.
Bird Dog
- Start on your hands and knees in a tabletop position.
- Extend your right arm forward and left leg back while keeping your spine completely stable and flat.
- Hold, then switch sides.
Suggested format 10-second hold each side · Part of the 5-3-1 descending pyramid — see the routine above.
General educational information from the practice — not personalised advice or a prescription. If anything is painful, stop. Book an appointment for guidance specific to you.


