Adaptive Randomization of Aerobic Exercise During Chemotherapy in Colon Cancer

Inclusion Criteria: * Age ≥18 years * Histologically confirmed stage II or III colon cancer * Completed surgical resection with curative intent * Plan to initiate chemotherapy * Engage in <60 minutes per week of moderate- to vigorous-intensity structured aerobic exercise * No planned major surgery during the study period * Readiness to exercise, as determined by a modified version of the Physical Activity Readiness Questionnaire * Can walk 400 meters * Can read and speak EnglishLanguage * Ability to provide written informed consent * Provide written approval by qualified healthcare professional * Willing to be randomized Exclusion Criteria: * Evidence of metastatic colon cancer * Concurrently actively treated other (non-colon) cancerPrior malignancy * Currently pregnant, breastfeeding, or planning to become pregnant within the next 24 weeksPregnancy * Currently participating in another study with competing outcomes * Any other condition that, in the opinion of the investigator, would preclude participation or successful compliance with the protocol * Any other situation that, in the opinion of the investigator, would negatively impact subject safety or successful compliance with the protocol