Regular exercise is linked to a 10–20% lower risk of several cancers, according to this review. The 2026 paper reviewed evidence on exercise and cancer prevention and care. It covered both cancer risk and outcomes in people already living with cancer. This was a review of existing studies, not one new exercise test. The reported risk reductions covered bowel, breast, lung, bladder, and stomach cancers. Studies also showed 40–50% fewer deaths from cancer among people who exercised. That finding was strongest for breast, bowel, and prostate cancers. These figures describe findings across studies, not a promised benefit for each person. The review also reported relief from treatment-related tiredness and Nausea. For our Lymphocytes % community, the immune-system link is worth a closer look. The review describes how exercise can activate immune cells that attack cancer. These include certain lymphocytes, a type of cell that helps defend the body. Exercise may also reduce inflammation and help the body use sugar better. But more active immune cells do not necessarily mean a higher lymphocyte percentage. The review does not report a change in that blood test. It also does not show that raising this number lowers cancer risk. The best exercise type, effort level, and timing remain open questions. For members tracking bloodwork, this distinction keeps comparisons grounded. Exercise logs alongside test results can help document your own patterns. Comparing notes here can show how routines and numbers differ between members. Those patterns cannot prove that exercise caused a change or measure cancer protection. What patterns have you noticed in your Lymphocytes % across changes in your exercise routine?