Do you get a workout on an e-bike?

Yes. Studies of e-MTB riders and e-bike commuters find the effort is moderate to vigorous for most of the ride. In a 2019 Brigham Young University study, average heart rate on an e-MTB was about 94 percent of that on a regular mountain bike.

Is an e-bike as good as a regular bike for fitness?

Per minute it is a little easier. Over a week it can be as good or better, because people tend to ride e-bikes further and more often. A large European study found e-bike users got about as much weekly physical activity as regular cyclists.

Can you lose weight riding an e-bike?

Riding an e-bike burns energy like any moderate exercise, and it helps most if it replaces time sitting or driving. Weight loss also depends on diet and everything else you do, so the bike alone is not a plan.

How do I get more exercise from my e-bike?

Use the lowest assist mode that works, ride longer loops, do climbing repeats, keep a steady cadence and turn the assist off for flat sections.

Is riding an e-bike good exercise? What the studies say

The short answer

Riding an e-bike is good exercise. The motor only helps while you pedal, so you are always working, and studies of both e-MTBs and e-bike commuters find the effort lands in the moderate to vigorous range that health guidelines ask for. Per minute it is a little easier than a regular bike. Over a week it often adds up to as much or more, because people ride e-bikes further and more often.

What the research says

There is more evidence here than most people expect. A few studies worth knowing:

E-MTB vs regular mountain bike (Brigham Young University, 2019). Experienced riders rode the same loop on both bikes. On the e-MTB their average heart rate was about 94 percent of the regular-bike figure, and most of the ride on both bikes was spent at vigorous intensity. They were faster on the e-bike.
Inactive commuters (University of Colorado Boulder, 2016). Twenty people who drove to work and did not exercise swapped the drive for an e-bike, at least 40 minutes three times a week, for a month. Their aerobic fitness and blood sugar control improved.
Weekly activity across European cities (PASTA project, 2019). E-bike users got about as much physical activity per week as regular cyclists, mostly because they rode longer distances.

The pattern is consistent: a bit less effort per minute, more minutes.

Why it feels easier than it is

Most of what makes riding feel hard is the worst minute: the steepest pitch, the headwind, the climb where your legs fill up. The motor takes the top off those moments. Your heart rate still sits well above resting for the whole ride; it just stops spiking into the red. That is why e-bike riders often report lower perceived effort than their heart rate data suggests.

How to make an e-bike ride harder

If you want the workout, it is entirely in your hands:

Use the lowest assist mode that gets you up. Eco on everything except the steepest climbs.
Ride longer, not just faster. The extra range is the point. Add the loop you normally skip.
Do climbing repeats. On an e-MTB, three laps of a climb and descent beats one, both for fitness and for skills.
Keep your cadence up. Spinning at a steady pace keeps your heart rate up more than mashing in a hard gear with high assist.
Turn it off for a section. A flat or gentle stretch with no assist is a short interval you can repeat.

Who benefits most

The studies point the same way as common sense:

People who were not riding at all. The biggest health gains come from going from nothing to something, and an e-bike makes that first step much smaller.
Riders coming back from injury or getting older. They keep riding the trails they like, at an effort they can manage.
Mixed-fitness groups. Everyone rides together and everyone works, instead of the slowest rider suffering and the fastest one waiting.

Where the honest caveats are

An e-bike is not the same workout as a regular bike at the same speed. If you sit in the highest mode on every ride, you will get a lot less out of it. Weight loss depends on far more than how you get around. And none of the studies above are huge; they are small, careful comparisons, which is how this kind of research usually starts.

But "is it exercise?" has a clear answer. If your heart rate is up and you are breathing hard, it is exercise, whatever is bolted to the frame.

If the exercise question comes up because someone told you your bike is cheating, I wrote about that too: is riding an e-MTB cheating?