What is osteoarthritis – and why is exercise still important?
Osteoarthritis is a degenerative joint disease in which the cartilage between the joint bones breaks down. The result: pain, stiffness, and restricted mobility – especially in the knees, hips, and spine. Typical symptoms include morning stiffness and a dull, grating sensation when moving the joint.
The intuitive reflex of many sufferers is: take it easy. Move less, rest more. But from a medical perspective, this is counterproductive. Articular cartilage has no blood supply of its own – it is nourished by movement. Only when the joint is moved is synovial fluid pumped, which supplies the cartilage with nutrients and simultaneously acts as a shock absorber.
Lack of exercise worsens osteoarthritis. Controlled, joint-friendly exercise slows it down.
Why cycling works for osteoarthritis
When cycling, the knee joint moves in a smooth, circular motion – without impact. Unlike running, climbing stairs, or ball sports, there is no impact on the joint when cycling. The body weight rests on the saddle, not on the knees.
This has concrete effects on joint wear and tear:
| sport | Joint impact load | Suitable for knee osteoarthritis |
|---|
| Run | High (3–5 times body weight) | Limited to not recommended |
| Climb stairs | Medium-high | Often painful |
| To swim | Minimal | Very well suited |
| Ride a bike | Minimal | Very well suited |
| E-bike riding | Minimal | Ideally suited |
The consistent pedal rotation also strengthens the quadriceps femoris muscles, which stabilize the knee joint. Weak thigh muscles are a key risk factor for osteoarthritis pain – any training of this muscle group directly relieves stress on the joint.
The e-bike as a miracle cure for osteoarthritis
A conventional bicycle can also be a good choice for people with osteoarthritis – but it has its limitations. Hills, headwinds, or simply days when the joints aren't cooperating can force you to abandon the ride or pedal hard, which in turn can be painful.
The e-bike elegantly solves this problem: the electric assistance allows you to regulate your own effort. If your knees are sensitive on a bad day, the motor takes over a larger share – and you still move your joints without overloading them.
What this means:
- You can ride more regularly because you don't base every trip on your current pain threshold.
- You drive more relaxed and protect your joints on inclines, where the knee would otherwise be under maximum stress.
- Even on days with morning stiffness or after a flare-up, you can gently keep moving.
Electric pedal assistance is therefore not a simplification for lazy people – but a medically useful tool for people who want to keep their bodies moving despite limitations.
Saddle height and adjustment: The decisive factor
Cycling is only easy on the joints if the bicycle is properly adjusted. Saddle height is the most important parameter – especially for people with knee osteoarthritis.
Correct saddle height:
The knee should still be slightly bent at the bottom of the pedal stroke – usually at an angle of about 25–35 degrees. A saddle that is set too low significantly increases the stress on the knee joint and intensifies pain.
Practical test: Sit on the bicycle and place your heel on the pedal. Your leg should be fully extended at the lowest point – then the saddle height is correct, and your knee will be at the optimal angle when riding with your forefoot on the pedal.
Other relevant settings:
- Handlebar position: A slightly raised handlebar reduces pressure on the spine and hips.
- Saddle tilt: Neutral or slightly forward tilt relieves the lower back
- Crank arm length: Shorter crank arms reduce the knee's range of motion – relevant in advanced osteoarthritis
Which types of osteoarthritis benefit the most?
Cycling with e-bike support is suitable for various forms of osteoarthritis – with different focuses:
Knee osteoarthritis (gonarthrosis):
The most common form, offering direct benefits through joint-friendly pedal rotation and strengthening of the stabilizing muscles. Regular short rides (20–40 min.) are often more effective than occasional longer rides.
Hip osteoarthritis (coxarthrosis):
Cycling uses the hip joint within a moderate range of motion – without the impact of running. Important: The saddle height should be adjusted so that the hip joint is not bent too far. A slightly raised saddle is helpful in this regard.
Spinal osteoarthritis:
Body posture is key here. An upright bicycle or an e-bike with ergonomic handlebars (not low-set drop handlebars) is the better choice. E-bikes with step-through frames or integrated luggage racks are often more comfortable for people with back problems.
What the research says
The scientific evidence is clear: Aerobic, joint-neutral endurance training – which includes cycling – is considered one of the most effective conservative treatment options for osteoarthritis of the knee and hip. The Cochrane review by Fransen et al. (2015) summarized 54 randomized controlled trials and confirmed that joint-friendly exercise reduces pain and that these improvements are still detectable 2–6 months after the end of the training.
A network meta-analysis in the British Medical Journal (Uthman et al., 2013) directly compared different forms of training for knee and hip osteoarthritis – result: Combined strength and endurance training performed best, and cycling was among the best tolerated forms with the lowest dropout rate.
Of particular relevance: A systematic review with meta-analysis in Clinical Rehabilitation (Luan et al., 2021) specifically investigated stationary cycling (ergometer training) in knee osteoarthritis and concluded that cycling significantly improves both pain and athletic function – with a favorable ratio of effect size to stress on the joint.
And for those thinking long-term: An analysis of the Osteoarthritis Initiative (Lo et al., 2024) with over 2,600 participants showed that people who cycled regularly throughout their lives had a 17% lower risk of frequent knee pain – and those who continued for at least four decades reduced the risk of symptomatic osteoarthritis by as much as 43%.
How to get started: Practical recommendations
If you have osteoarthritis and want to start riding an e-bike, a structured approach will help:
In the first few weeks:
- Start with 15-20 minutes on flat routes
- Choose a medium support level (e.g. “Tour” or “Standard”)
- Pay attention to a high cadence: it's better to pedal quickly and lightly than slowly and heavily (aim for 60–80 rpm)
- Drive daily or every other day – regularity is more important than intensity
After 4–6 weeks:
- Extend travel times to 30–45 minutes
- Include gentle inclines (feel free to use motor assistance)
- Pay attention to pain signals: a slight pulling sensation after driving is normal, sharp pains during driving are a warning sign
The following always applies:
- Pause during an acute flare-up of inflammation
- Consult a doctor or physiotherapist before starting training.
- Warm-up before riding: 5 minutes of easy pedal rotation without weight distribution
Conclusion: Exercise is medicine – the e-bike makes it accessible.
Osteoarthritis is not a diagnosis that condemns you to a standstill. Cycling – and especially e-biking – is one of the few sports that orthopedists explicitly recommend for osteoarthritis patients because it nourishes the cartilage, strengthens the joint muscles, and does not put stress on the joints.
The e-bike removes the last hurdle: you don't have to be in top shape to stay active regularly. The motor's assistance adapts to your limits – not the other way around.
Those who regularly ride an e-bike not only protect their joints – they invest in mobility, quality of life and independence that extends far beyond the next ride.
