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. Author manuscript; available in PMC: 2021 Nov 3.
Published in final edited form as: Hum Factors. 2014 Jun;56(4):669–683. doi: 10.1177/0018720813509268

TABLE 7:

Compressive Forces on L5/S1 and Weighting Factors Resulting From Arm Postures

Input Arm Angle Definition Midpoint
Angle		 Average
Compressive Force
on L5/S1 (kN)		 Weighting
Factor
A2 1 arm >60° >60° 120°a .40 .16
A3 2 arms >60° >60° 120°a .56 .31
a

Midpoint between 60° and 180°.