Isokinetic lifting simulation: a normative data study.

Area of Science:

• Biomechanics
• Exercise Physiology
• Occupational Health

Background:

• Assessing lifting capacity is crucial for injury prevention and rehabilitation.
• Standardized methods are needed to establish reliable normative data for lifting tasks.
• Previous research lacked comprehensive normative data for isokinetic lifting across various speeds and age groups.

Purpose of the Study:

• To describe a system for data collection using an isokinetic lifting task simulation device.
• To report normative data findings based on a standardized lifting posture (flexed knees-flexed back).
• To provide benchmarks for performance comparisons in clinical and occupational settings.

Main Methods:

• 2688 healthy subjects (10-79 years) performed maximal lifting repetitions on a Liftask device.
• Testing involved standardized flexed knees-flexed back posture across six speeds (6-36 inches/sec).
• Data collected included peak force, average force, power, and total work, analyzed by sex and age decade.

Main Results:

• Overall lifting performance generally decreased as test speed increased.
• Peak force and average power demonstrated an increase in direct proportion to speed.
• Subject performance peaked in the 20-29 age group and declined with advancing age.

Conclusions:

• The study provides valuable normative data for isokinetic lifting using a flexed knee-flexed back posture.
• These findings can serve as clinical reference points for evaluating lifting performance.
• The data aids in understanding the influence of speed and age on lifting mechanics.