The Use of Negative Acceleration as Accessory Force during Lifting

Table 1

Trunk and knee angles when “D” force is generated.

Load	Trunk first	Trunk last	Knee first	Knee last
0 lb	49.90±13.99	92.01±9.25	74.41±13.2	96.66±3.45
10 lb	42.80±9.39	94.3±3.52	80.81±11.68	94.79±3.11
20 lb	44.87±7.23	92.23±3.87	80.81±11.68	94.79±3.11
25 lb	39.44±12.85	83.2±15.29	79.43±12.52	91.81±6.08