104 patients with unilateral tennis elbow from both genders (57 females and 43 males) referred by orthopaedist with age ranged between 20 and 60 years.

hey were recruited in the study from October 2020 to September 2021 and allocated randomly into two groups. Group A received premodulated current in addition to exercises, and group B received diadynamic current with the same exercises. Each patient signed the informed consent form approved by the faculty of physical therapy, October 6 university, Egypt and prospectively registered (Clinical Trials.gov, Identifier NCT03338283). Patients was selected according to the following criteria.

Inclusive criteria

• Patients suffer from pain at the lateral part of the elbow and radiated to the forearm with tenderness increasing on pressure on the lateral epicondyle and on resistance of hand extension
• lasting of the symptoms for 3 months
• no previous physiotherapy interventions.

Exclusive criteria

Internal or external fixation

• arthritis of elbow
• contraindications to electrotherapy like pacemaker, dermatological skin disease, epilepsy, abnormal sensation, and pregnancy.

Inclusion Criteria:

• Patients suffer from pain at the lateral part of the elbow and radiated to the forearm with tenderness increasing on pressure on the lateral epicondyle and on resistance of hand extension
• lasting of the symptoms for 3 months
• previous physiotherapy interventions.

Exclusion Criteria:

• Internal or external fixation
• arthritis of elbow
• contraindications to electrotherapy like pacemaker, dermatological skin disease, epilepsy, abnormal sensation, and pregnancy.