Whether or not you can exercise on a bicycle after a meniscus injury occurs depends on the specific injury and whether or not it is in the acute stage. If the meniscus injury is mild, such as degree 1, cycling can be done with little impact on the joint. If the meniscus injury is 2nd or 3rd degree, it will lead to swelling of the joint, which may aggravate the injury site and increase the swelling of the knee joint when exercising, which is not conducive to recovery. Cycling during the acute phase of a meniscus injury can lead to increased localized damage and increased blood leakage, which can lead to more pronounced joint swelling and further aggravation of joint pain and unfavorable movement. Generally, after treatment with a brace or cast or surgery, the acute phase of the meniscus can be passed before knee flexion and extension exercises can be performed, which can be taken in the form of cycling, but before cycling it is also best to exercise the knee flexion and extension in the bedside position to avoid further injury due to excessive activity.