 Eligibility: Participants will be recruited from the Cross Cancer Institute. The eligibility criteria include medical, demographic, and logistic criterion, and are focused on internal validity as well as external validity. Eligibility criteria for the study are: 1 histologically confirmed lymphoma cancer, 2 18 years of age or older, 3 not receiving chemotherapy or scheduled to receive at least 2 cycles 8 weeks of chemotherapy, excluding high dose chemotherapy with stem cell transplant, 4 approval of the treating oncologist, 5 able to understand and provide written informed consent in English, 6 no uncontrolled hypertension, 7 no uncontrolled cardiac illness, 8 no active psychiatric condition, and 9 no contraindications to exercise as determined by a maximal fitness test conducted by a certified fitness consultant CFC. 