This question is about Cycling
Yes, research indicates that cycling is good for lung function and improves cardiovascular fitness [ 1 2 3 1 4
[1] Oja, P., Titze, S., Bauman, A., de Geus, B., Krenn, P., Reger-Nash, B., & Kohlberger, T. (2011). Health benefits of cycling: a systematic review. Scandinavian journal of medicine & science in sports, 21(4), 496–509. https://doi.org/10.1111/j.1600-0838.2011.01299.x
[2] Cavalheri, V., & Granger, C. L. (2020). Exercise training as part of lung cancer therapy. Respirology, 25(S2), 80–87. https://doi.org/10.1111/resp.13869
[3] Spruit, M. A., Burtin, C., De Boever, P., Langer, D., Vogiatzis, I., Wouters, E. F., & Franssen, F. M. (2016). COPD and exercise: does it make a difference? Breathe (Sheffield, England), 12(2), e38–e49. https://doi.org/10.1183/20734735.003916
[4] Møller, N. C., Østergaard, L., Gade, J. R., Nielsen, J. L., & Andersen, L. B. (2011). The effect on cardiorespiratory fitness after an 8-week period of commuter cycling--a randomized controlled study in adults. Preventive medicine, 53(3), 172–177. https://doi.org/10.1016/j.ypmed.2011.06.007