Exercise Bike vs Treadmill: Which Is Better?

By the Spin Pick editorial team · Updated 2026 · How we test & score

Exercise bike or treadmill is one of the most common home-gym decisions. Here's how they compare so you can pick the right one.

Quick answer

Both are excellent cardio machines. A treadmill generally burns slightly more calories and trains running fitness, but is higher impact on the joints and takes more space. An exercise bike is lower impact, gentler on knees and backs, quieter and more compact. Choose the bike for joint-friendly cardio and the treadmill for running and maximum calorie burn.

Calories and fitness

Running on a treadmill typically burns a bit more per minute than moderate cycling, because it's weight-bearing. But a hard interval session on a bike can match or beat easy treadmill walking. Both improve heart and lung fitness well; the best one is the one you'll use consistently.

Joints, space and noise

The exercise bike wins on being low impact - you're seated and supported, which suits sore knees, backs and heavier users. It's usually quieter and more compact too. The treadmill is bulkier, louder and higher impact, but it trains real-world walking and running and can feel more engaging for some.

Our top picks

Frequently asked questions

Which burns more calories, a bike or treadmill?

A treadmill usually burns slightly more for the same effort because it's weight-bearing, but a high-intensity bike session can match easy treadmill work. Effort level matters more than the machine.

Is an exercise bike better for bad knees?

Yes - cycling is low impact and seated, so it's gentler on knees and backs than running on a treadmill, while still giving a good cardio workout.

Which takes up less space, a bike or treadmill?

An exercise bike is usually more compact and lighter, and many fold or move easily. Treadmills are bulkier and heavier, though some fold up too.

Bottom line

Our top pick is the Xterra Fitness FB Folding (our score 9.6/10) - A practical exercise bike (upright bike, magnetic resistance, foldable) for convenient home workouts..