Full report is linked in the article, here it is again ICYMI... https://www.sciencedirect.com/science/article/pii/S259019821930017X

Re the distance and amount of exercise... the main takeaway I got is that e-bikers feel more capable of taking the longer trips, perhaps because they know they have the assistance to fall back on. Most of the time commuters travelling on or above the 25km/h mark won't use it anyway, so the exercise benefits are the same as the rider of a non-assisted bike for most of those kilometres.

And as BikeJon says... well the benefits vs a car are very obvious!

Interesting article, can we see the full report please? I have just finished riding an e-bike, (peddle assist.) I had it for two weeks. I have cycled for 53 years on racers, tourers and mtb bikes, and can now add a peddle assist electric bike to my experience. My views. At first I found the e bike heavy, and cumbersome, came without a rack and bottle baze-ons also the saddle was very uncomfortable, so I put my brookes on it.   I set off on my first jaunt and wondered why it kept slowing down, then I realised that it was limited to 15mph, and I could not go any faster! This was annoying so I slowed down and began to enjoy a ride along Southport coastal road into a strong head wind. Aha! This is where the e bike scores as the motor kept me bowling along withut any real effort on my part. However, my heart rate barely increased. Surely exercise was meant to raise the heart rate! I then went into town, then across town then back again. It was so easy!  For a city urban bike it did excatly as its name would suggest, and guess what? I had great fun zipping along roads and cutting through traffic acting a little like a hooligan! Legally of course! Would I have done this on my normal bike? Yes, but it would have taken a little more effort, and I would have felt that I had exercised, and that for me means legs and heart working and I like that feeling. So the e-bike  took something away, a sense of acomplishment, but delivered a travel experience akin to a car but without all the difficulties associated with car ownership, parking, traffic, etc. If I was twenty years older, it would be a yes from me as it would help keep my hips, knees and ankles working, and it would possiblly replace the car for shopping trips and visiting friends. if only I could see the digital readout!!!! 

Not that they asked me, but yes, I certailnly cycle more often and further with the e-bike. Where I would be put off from cycling on wet and windy days, or when I've got large amounts of stuff to lug about, having the e-bike means I'm much happier to venture out.