Micah Toll writing for elektrek:

Believe it or not, electric bikes offer more exercise than pedal bikes on average. That fact might sound strange (and has been known to let the steam out of some fitness riders’ lycra outfits), but the science is clear. Now let’s talk about the “how” and “why”.

Study after study have shown that people who ride e-bikes get more exercise than those who ride pedal bikes.

Its obvious - the ease of electric bikes allows their owners to ride longer and more often.