Why my knees feel different in running shoes versus lifting shoes
I've been juggling morning jogs along the Tan in Melbourne with evening sessions at the rack, and the gap between how my knees respond in each pair of shoes keeps catching my attention. On a five kilometre loop I barely think about my footwear, but the moment I load a barbell across my back my knees become very aware of what is under them.
It's not that one pair is wrong and the other is right. The two shoes are built for very different jobs, and the body responds to those jobs in ways that are surprisingly easy to feel. Over time, swapping between them has taught me a lot about how much the ground beneath a lift shapes the load through the joint.
The heel drop and how it shifts load
Running shoes usually come with a noticeable heel-to-toe drop, often somewhere between 8 and 12 millimetres. That ramped shape helps the foot roll forward during gait and softens the landing. When you stand flat in them, your torso sits slightly forward of your heels compared to a flat-soled shoe.
Lifting shoes, by contrast, keep the heel low, and the classic powerlifting models actually raise the heel by a small amount on top of a hard, flat sole. That extra wedge changes the angle of the ankle and knee. Many lifters in commercial gyms around Sydney and Brisbane use this to keep a more upright torso during squats, which can take some of the grind off the lower back and shift stress away from the kneecap.
Cushioning versus a stable base
The foam stack under a running shoe is built to absorb repeated impact. A hundred strides a foot, thousands of steps per run, and the foam compresses and rebounds to keep the joints from taking the full force. It is a lovely thing when you are covering distance along the Yarra or around the Domain.
A lifting shoe barely compresses at all. The sole is usually a solid block, sometimes with a thin wedge of harder material, designed to keep the foot planted and to transmit force into the floor rather than absorb it. When I squat in runners, I can feel my heel creeping into the foam a fraction of a millimetre on each rep, and that small wobble is exactly what the knee notices on the way back up.
Squat mechanics and knee tracking
A flat, firm base gives the foot something to push against, which helps the knee track over the middle of the foot. Runners tend to let the foot roll inward slightly, especially as the foam fatigues late in a session. That inward roll pulls the knee with it.
In a proper lifting shoe, the foot stays put. The arch is supported, the heel stays grounded, and the knee tends to drift less on the descent. I noticed this most when I was working through a beginner deadlift program during a cut and kept my heel pressed firmly into a hard sole the whole time. The difference between a wobbly setup and a planted one is small on paper, but my knees told the story.
Small signs that the current shoe is fighting the lift:
- Heel rising on the way up out of the hole.
- Knees caving inward during the ascent.
- A pinchy feeling at the front of the kneecap during warm-ups.
- Needing an extra warm-up set just to find a stable footing.
Running mechanics and the cushioning tradeoff
On the road, the same stability that helps a squat can become a liability. A flat, hard sole transmits shock straight into the knee on every footfall, and over a long run that adds up. Most runners in Perth and Adelaide stick with cushioned trainers for this reason, even if they cross-train in the gym.
Trying to run in lifting shoes tends to feel wooden and harsh within a kilometre, while squatting in runners feels like the floor is giving way under the heel. Each shoe is doing exactly what it was designed to do, and the knee is paying attention to the difference.
Picking shoes for a mixed training week
For anyone who runs and lifts in the same week, the practical move is to keep both pairs in the bag. A pair of lifting shoes tucked next to the runners by the front door is a common sight at local F45 studios and at the bigger commercial chains around the suburbs.
Habits that have worked across a mixed training week:
- Save the cushioned trainers for runs, long walks, and any conditioning piece that involves repeated impact.
- Switch into lifting shoes for heavy squats, paused work, and any deadlift variation that needs a stable floor.
- If you only own one pair, a flat, firm training shoe is the better compromise for a week dominated by barbell work.
- Replace lifting shoes less often than runners, since the sole hardly wears, but watch for any cracking in the heel wedge.
A quick side-by-side of how the two shoes stack up:
| Feature | Running shoes | Lifting shoes |
|---|---|---|
| Heel height | Elevated, 8-12 mm drop | Flat or raised wedge |
| Sole firmness | Soft, compressible foam | Hard, non-compressible |
| Best for | Forward motion, impact | Static, heavy loading |
| Knee feel during squats | Soft but unstable | Planted and supported |
| Knee feel during runs | Cushioned and forgiving | Harsh and jarring |
The honest takeaway is that the knee does not get confused between the two shoes — it reacts to the design intent. Cushioning absorbs impact and lets the foot roll, which is perfect for covering ground from Coogee to the Tan. A hard, flat base locks the foot in so the knee can push straight up through a heavy rep, which is exactly what you want when the bar is on your back and the weight is moving slowly. Matching the shoe to the work keeps the joint quieter, and quieter knees tend to be the ones that keep showing up to train.