Treadmill vs. Exercise Bike: Which Is Better for Bad Knees? | HARISON
Hey — your knees hurt. But you still want to move. Cardio shouldn’t feel like punishment.
So which is better: a treadmill or an exercise bike?
Let’s look at what the research says. 👇
🔬 What the Science Says
A 2024 clinical study compared high-intensity training on bikes vs. treadmills for knee health.
The result? Bike training preserved knee cartilage volume. Treadmill training led to cartilage loss and increased knee pain.
After 12 weeks of training, the treadmill group showed reduced knee cartilage volume, higher joint temperature, and more pain. The bike group? No significant changes.
Translation: If your knees are already talking to you, cycling is the smarter choice.
🚴♂️ Why Exercise Bikes Win for Bad Knees
Zero impact. Your feet never hit the ground. Every pedal stroke is smooth, controlled, and joint-friendly.
Controlled range of motion. You can adjust seat height to get that perfect 25-35° knee bend – no more, no less.
Supportive seating. Recumbent bikes take weight off your knees entirely. Upright bikes also work great with proper fit.
Clinical studies confirm: recumbent cycling produces the lowest relative knee stress of any cardio machine. That’s why physical therapists often prescribe bikes for knee rehab.
🏃♂️ Can You Use a Treadmill?
Yes – with caution.
Treadmills with good cushioning (like HARISON’s Soft Drop Suspension) reduce impact significantly. Walking is better than running. Flat is better than incline.
But the science is clear: at higher intensities, treadmills stress knee cartilage more than bikes.
If you choose a treadmill:
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Walk, don’t run
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Keep sessions short (15-20 min)
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Use a cushioned deck
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Stop if you feel pain
🏆 Which HARISON Machine Is Right for You?
| Your Knee Situation | Best Choice | Why |
|---|---|---|
| Mild discomfort, want variety | HARISON Treadmill (walking mode) | Soft Drop Suspension cushions each step |
| Moderate knee pain / OA | HARISON HR-B51 Recumbent Bike | Padded backrest, sliding seat, zero joint stress |
| General knee protection | HARISON HR-X3L Upright Bike | 16-level seat adjustment, 25-35° knee bend, low impact |
| Need to start super gentle | HARISON HR-B8Re or HR-B12 | Recumbent + automatic resistance, therapist-approved options |
All HARISON bikes feature tool-free seat adjustments – find your perfect fit in seconds.
📝 Bottom Line
Exercise bikes are better for bad knees. Period. The research is clear: cycling preserves cartilage, treadmills can accelerate knee issues at high intensity.
Does that mean you can never use a treadmill? No. Walking on a cushioned deck is fine for mild cases.
But if you want the safest, most sustainable cardio for sensitive knees? Get on a bike.
FAQ
1. Is walking on a treadmill bad for bad knees?
Moderate walking is usually fine. High-intensity running is not. Use a cushioned deck and listen to your body.
2. Recumbent vs upright bike – which is better for knees?
Recumbent puts less stress on knees and lower back. Upright is also good if properly adjusted.
3. How do I adjust my bike seat for knee protection?
Your knee should bend 25-35° at the bottom of the pedal stroke. HARISON bikes have tool-free levers for easy adjustment.
4. Can I do HIIT on a bike with bad knees?
Yes – bikes handle interval training well. Start with low resistance, short intervals, and monitor how your knees feel.








