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Relationship between lifting capacity and anthropometric measures.

M T Gross¹, E S Dailey, M D Dalton

¹Program in Human Movement Science, Division of Physical Therapy, The University of North Carolina at Chapel, 27599-7135, USA mgross@css.unc.edu

The Journal of Orthopaedic and Sports Physical Therapy

|May 19, 2000

Summary

This study found that sex, age, thigh girth, pelvic girth, and body fat percentage can predict maximum lifting capacity. This information can help estimate pre-injury lifting ability and guide rehabilitation efforts.

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Area of Science:

Biomechanics
Occupational Health
Ergonomics

Background:

Low-back injuries are common in individuals performing lifting tasks.
Objective data are needed to determine pre-injury lifting capacity.
This data can inform rehabilitation decisions for these injuries.

Purpose of the Study:

To determine the relationship between lifting capacity and anthropometric variables.
To quantitatively model this relationship.

Main Methods:

Prospective analysis involving 35 men and 23 women (ages 22-40).
Measured variables included age, sex, height, weight, body fat percentage, torso height, pelvic width, pelvic girth, arm length, thigh girth, and calf girth.
Maximum lifting capacity was determined using a lordotic lumbar spine lifting technique.

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Main Results:

Stepwise regression analysis revealed a significant relationship between maximum lift capacity and a combination of sex, age, thigh girth, pelvic girth, and body fat percentage (multiple R2 = 0.76).
The regression model predicted lifted amounts with a mean absolute error of 16% of the actual weight lifted.

Conclusions:

The findings can assist in estimating pre-injury lifting capacity.
Further research is needed to model other lifting requirements like frequency, duration, hand-object coupling, and combined lifting and reaching.