Research Article

The Influence of External Additional Loading on the Muscle Activity and Ground Reaction Forces during Gait

Table 1

Statistical relationships between thermal and force parameters for three muscle groups: trapezius (TT), latissimus dorsi (TL), and obliquus abdominis (TO), and three ground reaction force values: maximal weight acceptance force (WA), maximal force in midstance (MS), and maximal force in push-off gait phase (PO), for the left and right leg, respectively. Significant relations ( or for Spearman’s test) are written in bold.

Load (%)Load typeForceMuscleLeft sideRight side
or description or description

5%BackpackMSTL-0.7570.018Very strong negative0.5730.3110.415Fair positive0.097
5%BackpackMSTT-0.2330.547Fair negative0.0540.8780.002Very strong positive0.771
5%BackpackPOTL-0.8520.004Very strong negative0.7260.8810.002Very strong positive0.777
5%BackpackWATO0.6910.039Moderate positive0.4770.1230.753Poor positive0.015
10%BackpackPOTL0.3510.354Fair positive0.123-0.6290.069Moderate negative0.396
10%BackpackWATL0.1770.649Poor positive0.031-0.8050.009Very strong negative0.649
15%BackpackMSTT0.1340.731Poor positive0.018-0.8670.002Very strong negative0.752
15%BackpackWATT0.1350.729Poor positive0.018-0.6210.075Moderate negative0.385
15%Bag acrossMSTO-0.7070.033Very strong negative0.5000.5860.097Moderate positive0.344
15%Bag acrossPOTL-0.6960.037Moderate negative0.4850.1300.739Poor positive0.017
15%Bag acrossWATL-0.3820.311Fair negative0.1460.7330.025Very strong positive0.537
15%Bag acrossWATO-0.3340.380Fair negative0.1110.7110.032Very strong positive0.505
5%Bag one handPOTT0.3780.209Fair positive0.143-0.5850.098Moderate negative0.342
15%Bag one handMSTL-0.756<0.05Very strong negative0.235>0.05Fair positive
15%Bag one handMSTT0.0310.937Poor positive0.001-0.5990.088Moderate negative0.359
15%Bag one handPOTL-0.807<0.05Very strong negative0.521>0.05Moderate positive
15%Bag one handWATL-0.277>0.05Fair negative0.731<0.05Very strong positive
15%Bag one handWATT0.6360.066Moderate positive0.404-0.0260.947Poor negative0.001
5%Bag shoulderMSTO0.7920.011Very strong positive0.628-0.3850.306Fair negative0.148
15%Bag shoulderMSTL0.5860.097Moderate positive0.343-0.2400.534Fair negative0.058
15%Bag shoulderMSTO0.3290.387Fair positive0.108-0.6410.063Moderate negative0.411
15%Bag shoulderPOTO0.6730.047Moderate positive0.453-0.2590.501Fair negative0.067
15%Bag shoulderPOTT-0.3730.322Fair negative0.1390.7500.020Very strong positive0.562
15%Bag shoulderWATO0.7570.018Very strong positive0.573-0.1320.736Poor negative0.017