Background Corona Virus Disease 2019 (COVID-19) has adverse effects on patients’ respiratory system. Therefore the pulmonary rehabilitation is particularly necessary for COVID-19 patients. A recent qualitative study indicated that patients perceived the impact of fatigue on their daily lives to be a key factor in decreasing their quality of life. This study aimed to investigate the knowledge and needs of physical fitness and breathing training, and to explore the impact of physical fitness and breathing training on COVID-19 patients. Methods From Feb 16, 2020 to Apr 6, 2020, a self-designed questionnaire was used to investigate the knowledge and needs of physical fitness and breathing training in COVID-19 inpatients. And then the participants received an intervention about physical fitness and breathing training which lasted 2 weeks. The 9-item Functional Assessment of Chronic Illness Therapy-Fatigue scale (FACIT-F) was used to measure COVID-19 related fatigue before and after the intervention. Findings According to a 5-point Likert scale, the 133 COVID-19 patients had only an "not really" and "uncertain" knowledge of physical fitness and breathing training (2.47±1.17). 86.98% of the patients expected to receive guidance of physical fitness and breathing training through video teaching. Differences were observed in fatigue, General fatigue component (15.0(8.0) vs. 19.0(10.0), P<0.01); Functional ability component (4.0 (3.0) vs. 7.0(4.0), P<0.01); Psychological component (6.0(5.0) vs.7.0 (5.0), P<0.01), after the intervention, Moderate degree (36.09% vs. 28.57%) alleviated to mild degree (51.12% vs. 66.91%). SpO2-% 86 ((75, 89) vs. 92(89, 98), P<0.001), and Oxygen flow-L/min (2(0,4) vs. 8(3,9), P<0.001). In our study, 130 healthcare professionals took part in this program. None of the participants reported covid-19 related symptoms. When the participants returned home, they all tested negative for SARSCoV- 2 specific nucleic acids and IgM or IgG antibodies (95% confidence interval 0.0 to 0.7%).Interpretation COVID-19 patients had insufficient knowledge of physical fitness and breathing training for pulmonary rehabilitation. Patients should be guided to receive training, which can be benefit for patients.