Background: There are a number of commercially available heart rate (HR) monitors on the market. The reliability of these monitors has had varying results. To the best of our knowledge, there are no telemonitoring services utilizing these devices for perioperative prehabilitation services for patients undergoing major surgery. The goal of this study is to pilot the MYZONE® MZ-3 HR monitor to assess its level of reliability to provide a feasible telephysiotherapy prehabilitation service through prescription-based exercise programs to patients presenting for major cancer surgery within our leading oncological health service. Materials and Methods: Paired HR data from each participant were captured and analyzed using a Bland-Altman plot. Results: Seven healthy participants were included in the study with a total number of paired HR data points of 1,928. The bias (mean difference) between electrocardiogram and the MYZONE MZ-3 was 0.4 beats per minute (bpm) with an adjusted 95% limits of agreement of -4.5 to 5.3 bpm. Conclusion: The commercially available MYZONE MZ-3 HR monitor is a reliable tool for delivering telephysiotherapy to patients undergoing major cancer surgery. Further studies are needed to validate its use in this setting.