Motorized cycling can help to make movements otherwise it would not be clear and such training could be a necessary option to train coordination and rhythm in the movement pattern. MOTOmed and Thera-Trainer are examples of such motorized bicycles.
For stroke patients with mild to reduced ability, such cycling has shown a significant improvement in bone function compared with normal rehabilitation. Motorized cycling also increases the balance and walking function of stroke patients.
Sources:
Damiano, D. L., Norman, T., Stanley, C. J., & Park, H.-S. (2011). Comparison of elliptical training, stationary cycling, treadmill walking and overground walking. Gait & posture.
Yang, H. C., Lee, C. L., Lin, R., Hsu, M. J., Chen, C. H., Lin, J. H., & Lo, S. K. (2014). Effect of biofeedback cycling training on functional recovery and walking ability of lower extremity in patients with stroke. Kaohsiung J Med Sci, 30(1)