A new type of coronavirus called Severe Acute Respiratory Syndrome (SARS-Cov-2) emerged in the city of Wuhan of China in December 2019. Due to its highly infectious nature, the new coronavirus (COVID-19) has spread over to more than 200 countries in the world and continues to infect more and more people worldwide. According to the World Health Organization, 5% of COVID-19 patients require the use of mechanical ventilators. Due to the fragile nature of the COVID-19 patients, it is of utmost importance that evidence-based safe exercises be applied to these patients. In this review, whole-body vibration, cycle ergometer, and electrical muscle stimulation were all investigated and evaluated in terms of their safety, feasibility, practicality, and the quality of evidence presented. According to the current evidence in the literature, they were all deemed safe and feasible alternatives to active exercises that could put the patients' health in jeopardy. Physiotherapists are recommended to work with the intensive care unit physicians regarding the implementation of these exercise programs and determine whether the patients with COVID-19 are suitable for the program. This review concluded that whole-body vibration, cycle ergometer, and electrical muscle stimulation modalities may serve as the safe rehabilitation practices for the physiotherapists worldwide to improve functional outcomes in patients with COVID-19, prevent muscle wasting, delirium, and decrease respiratory complications of COVID-19.