make bike stationary LISS Cardio
https://www.goodreads.com/topic/show/20483440-15-undeniable-reasons-to-love-what-muscles-does-a-stationary-bike-work-l
Even the ideal stationary bikes LISS cardio are less bulky compared to a treadmill or even a cross-trainer, also so you would swerve the journey to and out of the gym (time efficient for those that have active