Isokinetic peak torque and work values for the shoulder.

Area of Science:

• Orthopedics
• Sports Medicine
• Biomechanics

Background:

• Assessing upper extremity isokinetic muscular performance is crucial for evaluating shoulder function.
• Understanding differences between dominant and non-dominant limbs and between sexes is important for injury prevention and rehabilitation.

Purpose of the Study:

• To measure peak torque (PKT) and work during external/internal rotation (ER/IR) and modified abduction/adduction (MOD-AB/AD) tests at different angular velocities.
• To compare isokinetic performance data between dominant and non-dominant upper extremities.
• To compare relative peak torque and work between sexes.

Main Methods:

• Isokinetic testing was performed on 21 males and 20 females at 60 and 180 degrees/second.
• Tests included external/internal rotation (ER/IR) and modified abduction/adduction (MOD-AB/AD).
• Peak torque, total work, power, endurance, and agonist/antagonist ratios were analyzed.

Main Results:

• No significant differences were found in peak torque between dominant and non-dominant shoulders.
• Significant differences were observed between sexes for peak torque, total work, and power.
• No significant sex differences were found for endurance or agonist/antagonist peak torque and work ratios.

Conclusions:

• Dominant and non-dominant shoulder isokinetic performance may be comparable.
• Sex influences certain measures of shoulder muscular performance, particularly peak torque and power.
• Large standard deviations indicate a need for sex- and potentially age-specific normative data for isokinetic shoulder strength.