Aim: The aim is to study the effectiveness of physical therapy in the form of electromagnetic waves to create heat in the local tissue using short wave diathermy in the treatment of patients with lumbar Spondylosis. Methods: It is a prospective study of 60 cases of chronic low back pain with radiologically confirmed diagnosis of lumbar Spondylosis who were treated by physical therapy using a short wave diathermy along with other conventional methods for a minimum of four weeks and then evaluated its effectiveness in reducing pain levels using a visual analog scale. Results: Most of the patients were in the age group of 65-74 years and the mean age of the patients was 65.5 years. Lumbar Spondylosis was more common in female patients (70%) as compared to male patients (30%). Duration of symptoms ranged from 12 to 30 weeks. After treatment with physical therapy for 4 weeks, a highly significant improvement in VAS scores were found as compared to the pre-treatment levels. Conclusion: Patients with lumbar Spondylosis have a high prevalence of chronic low back pain. These patients have diverse diagnostic and therapeutic options and once confirmed radiologically, their treatment using physical therapy along with other conventional methods significantly improves treatment outcomes.