Laurien Buffart is associate professor and group leader of the Exercise Oncology research group at the department of Medical BioSciences of Radboudumc, Nijmegen, the Netherlands. She is a human movement scientist and epidemiologist by training. Her group examines the exercise effects on quality of life and treatment outcomes in patients with cancer. She aims to enhance precision exercise medicine in oncology by understanding what exercise program works best for which patients and at which timepoint during the cancer continuum, and by unravelling the biological mechanisms linking exercise to clinical outcomes. She performed randomised controlled exercise trials in various cancer populations to study the exercise intervention effectiveness, developed an internationally continuously growing shared database with individual patient data (IPD) from randomised controlled exercise trials to perform IPD meta-analyses on pooled data to study differences in effects across patient subgroups, and investigated exercise effects on anti-cancer immune responses. She contributed to the development of national exercise guidelines for patients with cancer and an interactive website of the Dutch World Cancer Research Fund (WKOF) to translate evidence on exercise safety and benefits into actionable knowledge for patients with and healthcare professionals, specifying exercise prescriptions tailored to treatment side-effects and comorbidities.