You’ve probably heard that a strong core helps with back pain. And while there is some truth to the idea that your core plays a role in supporting your spine, it’s not the whole picture. In fact, many people with strong cores still experience back pain, while others with modest strength get through life pain-free.
The truth is, it’s a bit more complex than we’re often led to believe.
In this article, we’ll unpack what your core actually is, how it relates to back pain, and what really matters when it comes to keeping your spine happy and supported.
What is the ‘core’?
In physiotherapy, when we talk about your “core”, we’re referring to the muscles that stabilise the spine, pelvis, and trunk (not just the ones that give you a six-pack).
The core includes both deep stabilising muscles and more superficial ones. Together, they control spinal movement, transfer load, and help protect your back during everyday tasks like lifting, twisting, or even standing.
Key muscles that make up your core
- Transversus abdominis – the deepest abdominal muscle, wrapping around the torso to stabilise the spine
- Rectus abdominis – the outer “six-pack” muscle, responsible for trunk flexion
- Internal and external obliques – run diagonally along the sides of your abdomen, helping with rotation and side-bending
- Multifidus – small muscles that run along the spine, essential for fine-tuned control of spinal movement
- Pelvic floor muscles – form the base of your core, working with the diaphragm and deep abdominals to manage pressure and control movement
- Diaphragm – your main breathing muscle, which also plays a stabilising role when activated properly
Why back pain isn’t always caused by a weak core
Back pain is complex. It can be influenced by things such as previous injuries, how your nervous system responds to movement, stress, fear, poor sleep, repetitive strain, or even just being too still for too long. Yes, your core plays a role, but it’s not the only factor—and it’s not always the main one.
You can have strong core muscles and still experience pain. You can also have a so-called “weak” core and feel completely fine.
What often matters more is how your body handles load, how well your muscles coordinate, and how confident and safe you feel moving. If your back feels stiff or sensitive, it’s not necessarily because your core is switched off, as it might just be that your system is on high alert trying to protect you.
Beyond the core: Why movement and load matter too
Your core muscles support your spine, but so does your ability to handle movement and pressure throughout the day. This is called load tolerance, which is how well your body manages stress from things such as lifting, sitting, standing, or repetitive tasks.
If the load builds up faster than your body can adapt, that’s often when pain shows up.
Posture variety is more useful than “perfect posture”
There’s no one ideal way to sit, stand, or move. In fact, staying in one position too long (even a “good” one) can cause discomfort. What helps more is regular movement, shifting postures, and giving your body variety.
The goal isn’t to hold a straight line all day. Instead, it’s to move well, often, and without fear.
Back pain is rarely about one muscle group
While the core is important, so are your hips, glutes, and legs. They all play a role in how you transfer load and stay stable. Building strength in these areas, alongside good movement habits, tends to make the biggest difference over time.
Safe, physio-approved core exercises to get you started
1. Abdominal Hollowing (Deep Core Activation)
Targets: Transversus abdominis, pelvic floor
Starting position: Lying on your back, knees bent, feet flat
- Gently draw your belly button inward (toward your spine) without holding your breath
- Hold for 5–10 seconds while breathing, then relax
- Repeat 8–10 times
This helps train the deep core muscles that support your spine from within.
2. Glute Bridge
Targets: Glutes, lower back, pelvic control
Starting position: On your back, knees bent, feet hip-width apart
- Press your heels into the floor and slowly lift your hips
- Pause at the top (avoid arching your lower back), then lower slowly
- Repeat 10–12 times
This builds strength in your posterior chain and supports better load-sharing through your hips and spine.
3. Bird-Dog (Kneeling Swim)
Targets: Multifidus, obliques, spinal control
Starting position: On all fours, shoulders over wrists, knees under hips
- Extend your left leg and right arm at the same time
- Keep your spine steady (imagine balancing a glass of water on your back)
- Return to starting position, then switch sides
- Repeat 8–10 each side
This one’s great for improving core coordination and spinal movement control.
4. Side Plank (Knees Bent or Full)
Targets: External obliques, deep core, stabilising muscles
Starting position: On your side, knees bent for support (or straight legs to progress)
- Lift your hips, keeping your body in a straight line
- Hold for 10–30 seconds, then switch sides
- Start with 2–3 holds per side
This strengthens the sides of your core and helps with spinal stability during twisting or side-bending movements.
Why to see a physiotherapist for back pain or core weakness
Not sure if you need help? Here are a few signs it might be worth booking in:
- Your pain has lasted more than a few weeks
- You keep getting flare-ups, even after resting or exercising
- You’re avoiding certain movements because they feel risky or uncomfortable
- Exercises you’ve tried don’t seem to help, or actually make things worse
- You’re not sure if your core is activating properly or what “good form” actually feels like
- You just want a plan that’s specific to your body and goals
A physiotherapist can help you make sense of what’s going on and guide you through a plan that actually fits, whether that’s core strength, movement retraining, hands-on therapy, or something else entirely.
If you’re stuck or unsure, we’re here to help.
You don’t need a perfect core to be pain-free
Core strength can definitely support your spine, but when it comes to back pain, there’s usually more going on than just weak muscles.
At Integrity Physiotherapy, we take the time to look at the full picture. Our approach to physiotherapy for lower back pain is hands-on, personalised, and focused on helping you move with more comfort and confidence.
If you’re ready to feel more confident in your body again, we’re here for you.
Book an appointment today and let’s get you moving comfortably again.
