Cycling is an excellent complementary activity to running for varying training and reducing joint impact while working the cardiovascular system.

noli's read

Scientific literature largely confirms the value of 'cross-training' for runners. Studies, notably randomized controlled trials published in journals such as the 'Journal of Strength and Conditioning Research', show that cycling allows for the maintenance or improvement of aerobic capacity (VO2 max) while minimizing trauma related to the repeated impacts of running. The concept of 'specificity' is nonetheless crucial: cycling does not replace running for the biomechanical adaptations specific to one's stride. The assertion that cycling is less 'harsh' is accurate from a mechanical standpoint, as it is a non-weight-bearing activity. On the other hand, performance transfer is more pronounced for beginner runners than for high-level athletes. The approach proposed here is balanced and consistent with current sports science recommendations for preventing overtraining.

the sources

No named source held this one up — that absence is part of the verdict.