sit down exercise bike LISS Cardio
https://m8rmbss671.doodlekit.com/blog/entry/5324806/why-nobody-cares-about-liss-cardio
The best stationary bikes LISS cardio are less bulky than a treadmill or some crosstrainer, and it means you'd swerve the travel to and from the gym (time-efficient for anyone that have busy schedules) or stop