When I weight train I mix it up, if I kept doing bench presses and left everything else alone I'd look like a barrel with skinny legs, which is why I cross train. Yes, I love cycling, but spinning and spinning will go so far, I know it's conditioning that forgets the rest of our bodies.
I trikked for a number of years, but my shoulder was giving me problems, so I switched to a Me-Mover. I understand "new", "different" is almost shunned, something done for years becomes an obsession, nothing can take its place, but it should, our bodies demand diversification, or we fall into a trap of our own making.
The Me-Mover taught me, I needed to work different muscles, the stepping motion was very different than spinning for hours, I felt the difference in the beginning, even after years of bicycle riding, my body needed preparation to propel the Me-Mover.
I acclimated at 78 years old, it didn't take long, but I stayed with it, now I look forward to cross train with my bicycle which seems much easier to propel because I feel my endurance has increased.