Background & Purpose: Many daily function and sporting events require high activity levels of the flexor musculature of forearm and hands. The hand is irreplaceable when it comes to performing any kind of movement, be it gross or skilled. The prime function of hand is grip. The importance of a normally functioning hand need no emphasis in performing activity of daily living, weather in earning in living, practicing a hobby or allowing independence in daily activities. Hand and wrist are the most active and intricate parts of upper extremity. There mobility is enhanced by a wide range of movements at the shoulder and complementary movements at the elbow and forearm. The 28 bones, numerous articulations and 19 intrinsic and 20 extrinsic muscles of the wrist and hand provide the tremendous variability of the movement. Grip is an action or activity of the hand in moving, grasping or taking hold of an object between any two surfaces of the hand, the thumb may or may not be involved. Measurement of grip strength is an important component of hand rehabilitation as it helps to establish the baseline for treatment and it is a measure of the effectiveness of therapy. Testing grip strength is a popular assessment used by physical therapist in clinical settings. It is generally agreed that a standardized testing protocol and position is important for reliability and compare the data. This study focused to determine the effect of forearm rotation on grip strength in normal healthy individuals.

Method: This cross-sectional study involved 150 healthy individuals. Following ethical approval and consent, participants performed grip strength tests with their dominant hand using a Jammer dynamometer. Tests were conducted in three forearm positions—full pronation (elbow at 90°), mid-prone, and supination—with three trials per position. Rest intervals of 2-3 seconds between trials and 2 minutes between position changes were observed.

Results: Data analysis used unpaired t-tests for comparisons within the same forearm positions but different elbow positions, and ANOVA with post-hoc tests for comparisons across different forearm positions. Significance was set at p≤0.05.