SARS-related illnesses, such as COVID- 19, were extremely contagious. Since the outbreak of SARS, quality of life and ability to exercise were negatively affected by a patient's illness severity. COVID patients were frequently discharged with a poor quality of life and significant physical and psychological impairment. Therefore, an immediate and effective treatment program was needed to address this issue. So, a randomized controlled study was conducted at Khawaja Farid Hospital Multan to see the effect of diaphragmatic breathing, and upper and lower limb exercise training on respiratory function, exertion, and the quality of life in COVID- 19 survivors. The study duration was from November 2021 to March 2022. Those who had recovered from COVID-19 were included in this single-blinded, randomized study, which included 176 participants ranging in age from 35 to 60 years. Spirometry, a 6- minute walk test, the borg scale, and the SF8 questionnaire were all used to assess outcome measures. Two groups were created for the subjects. Treatment was done five days per week for four weeks in both groups. SPSS V 23 was used to analyze the data. Histograms of age for both groups were plotted as well as a pie chart for gender distribution. Independent samples t-test was applied to find the comparison between the groups. FEV1 (forced expiratory volume) mean difference was - 12.56159. FVC (forced vital capacity) mean difference was - 15.63636. Post FEV1/FVC mean difference was - 14.92045. PCS (physical component score) mean difference was 4.63636. MCS (mental component score) mean difference was 8.22727. Between the groups, results showed that group 2 showed better improvement as compared to group 1 with a p-value of 0.000 which was highly significant. This study concluded that diaphragmatic breathing, upper limb exercise training along with lower limb exercise training was highly effective for improving respiratory function, exertion, and quality of life as compared to diaphragmatic breathing with upper limb exercise training.

Index Terms- Coronavirus, Respiratory system, Breathing exercise, Exercise training.