## 1 Introduction  
High complication rates following abdominal cancer surgery render many patients unable to perform a number of activities of daily living (ADL) that they were able to undertake before surgery [1]. Prehabilitation provides an opportunity to address physiological impairments preoperatively, improve quality of life, and attenuate patient-related barriers such as anxiety following surgery. It is an intervention that aims to increase a patient's preoperative physiological reserve to improve postoperative outcomes [2]. There is often limited time between the cancer diagnosis and the scheduled operation, with a window of four to six weeks between chemotherapy and surgery available for prehabilitation. Typically, these cancer patients undergo a strict prehabilitation program to improve their aerobic fitness and muscular performance before the operation. Traditional models of prehabilitation focus on multiple supervised exercise sessions in hospital or clinical settings. These programs last for approximately four to six weeks and the frequency, duration, and intensity of the prescribed prehabilitation activities is determined by the doctors and physiotherapists overseeing the program. In a supervisedprogram, the patient must visit the hospital or physiotherapy center at least two to four times a week and complete supervised exercise sessions lasting between 35 to 50 min [3; 4; 5]. In traditional models of prehabilitation, patient progression is directly recorded by the medical staff managing the program. The main advantage of this model is that the medical staff can be assured that the patient has performed the prescribed physical activities at the required intensity during the prehabilitation program, provided they are compliant [4; 6; 7]. In contrast, the main disadvantages of this traditional model are that it is demanding on resources (e.g., physical facilities (hospitals and clinics), equipment, and qualified instructors) and limited to those patients who have geographical access to these resources. Another approach to prehabilitation is an unsupervised community model. In an unsupervised community-based model of prehabilitation, patients can perform physical activities in a variety of local community settings, including the home, gymnasium, and outdoors [8; 9]. A community-based program also allows time flexibility to perform the physical activities. Home-based programs are significantly cheaper to run than hospital programs because of reduced demand on resources (e.g., facilities, staff, transport) and the limited need for travel. However, this type of program is usually unsupervised and medical staff cannot guarantee that the patient performs the prescribed physical exercise at an appropriate intensity. In recent times, the Coronavirus (Covid-19) pandemic disease has forced a number of hospitals and clinics to adopt the unsupervised community model for prehabilitation because of the limitations to physical access to clinics and the diversion of healthcare staff and resources to address the pandemic [10]. Evidence clearly indicates that compliance to unsupervised prehabilitation programs is considerably less than hospital-based programs [11]. Another approach for addressing resourcing and geographical isolation is to develop a mixed prehabilitation model via remote monitoring that includes supervised and unsupervised components of prehabilitation. A mixed, home-based, virtual prehabilitation program that could be delivered through a cyber physical system has the potential to minimize these effects [11]. Such a system could enable cancer patients to perform prescribed physical activities without visiting the hospital or physiotherapy center while healthcare staff can monitor patient progress remotely. Thus, a mixed model has the potential to reduce the impact on the healthcare system wrist providing cancer patients the opportunity to partake in prehabilitation under remote monitoring and supervision.