During the first 2 hours of their chemotherapy infusions, participants will pedaling for 30 minutes using a stationary cycle ergometer. Participants will be allowed to determine their pedaling intensity and cadence, however, will be encouraged to reach the established goal intensity level. Additionally, subjects will complete both a physical activity questionnaire (International Physical Activity Questionnaire) and a quality of life questionnaire (European Organization for Research and Treatment of Cancer QLQ - CR 29) at baseline and following their last chemotherapy treatment. A questionnaire on chemotherapy side effects (Memorial Symptom Assessment Scale) will be gathered at baseline, during chemotherapy cycles 3, 6, and/or 12, and following completion of chemotherapy treatment. Lastly, muscular strength and physical performance will be measured via grip strength tests and TGUG tests within 2-4 weeks of the post-surgery and chemotherapy completion CT scans.

Participants will pedaling at a low-moderate intensity using a stationary pedal ergometer concurrent to their chemotherapy (FOLFOX or FOLFIRI) infusion. Participants will cycle for 30 min within the first 2 hours of their infusion.

The number of completed pedaling sessions as well as the ability of patients to meet goal pedaling intensities will be evaluated.

Quality of life markers will be assessed using the European Organization for Research and Treatment of Cancer [EORTC] QLQ - CR 29 at baseline and following their last chemotherapy treatment.