Mark Stephen takes a paddle on the Union Canal with Scotland’s only cancer survivors' dragon boat group, the Port Edgar Dragons. He also learns about the origins of the Pink Dragon movement in Canada, a dragon boat team formed by cancer survivors. The initiative was founded by Dr Don McKenzie, a professor of sports medicine and exercise physiologist, who sought to challenge the prevailing medical belief at the time that women treated for breast cancer should avoid rigorous upper-body exercise due to the risk of lymphedema - a chronic and debilitating side effect of treatment.