Background: Lateral epicondylalgia is a common lateral elbow pain condition in which pain, reduced grip capacity, and impaired upper-limb function can limit work and daily activities. Exercise-based loading is commonly used in conservative management, but the comparative effect of progressive resistance and isometric home exercise requires clear clinical evaluation.

Objective: To compare the effects of a home-based progressive resistance exercise programme with a home-based isometric exercise programme on pain intensity, grip strength, and upper-limb function in adults with lateral epicondylalgia.

Methods: This manuscript is structured as a parallel-group randomized controlled trial. A proposed sample of 40 adults with lateral epicondylalgia is allocated equally to progressive resistance exercise or isometric exercise. Both programmes are home based and delivered for 6 weeks, with standardized education and progression criteria. Pain is assessed with the Numeric Pain Rating Scale (NPRS), grip strength with a calibrated hand dynamometer, and upper-limb function with the Patient-Rated Tennis Elbow Evaluation (PRTEE). Assessments are planned at baseline, week 2, week 4, and week 6. Between-group and within-group changes are analyzed using an appropriate repeated-measures model or equivalent mixed-effects approach.

Results: The numerical results presented in the tables and figures of this draft are illustrative only. In the example dataset, both groups demonstrate improvement over time, with a larger descriptive improvement in the progressive-resistance group for pain, grip strength, and PRTEE score.

Conclusion: A rigorously controlled comparison of progressive resistance and isometric loading may help clarify whether the loading strategy influences short-term pain, strength, and function in lateral epicondylalgia. Actual conclusions should be based only on the verified trial dataset.

Keywords: lateral epicondylalgia; lateral elbow tendinopathy; progressive resistance exercise; isometric exercise; grip strength; pain; PRTEE; home exercise; randomized controlled trial.