Effect of forearm rotation on grip strength

Area of Science:

• Biomechanics
• Human physiology
• Musculoskeletal research

Background:

• Grip strength is a crucial functional measure.
• Forearm rotation (pronation and supination) is a common movement.
• The influence of forearm rotation on grip strength requires detailed investigation.

Purpose of the Study:

• To investigate the effect of forearm rotation on grip strength.
• To compare grip strength across pronation, neutral, and supination positions.
• To examine sex-specific differences in grip strength related to forearm rotation.

Main Methods:

• Grip strength was measured in 40 volunteers.
• Forearm positions included pronation, neutral, and supination.
• Grip strength was assessed with both free and immobilized wrist conditions.

Main Results:

• Overall grip strength decreased from pronation to supination.
• Males showed significantly lower grip strength in pronation across wrist conditions.
• Females exhibited reduced grip strength in pronation with a free wrist, but higher strength in supination with an immobilized wrist.

Conclusions:

• Forearm rotation critically influences grip strength.
• Sex-specific responses to forearm rotation exist for grip strength.
• Understanding these biomechanical effects is important for clinical and performance assessments.