Arm swing asymmetry in overground walking.

Killeen, Tim; Elshehabi, Morad; Filli, Linard; Hobert, Markus A; Hansen, Clint; Rieger, David; Brockmann, Kathrin; Nussbaum, Susanne; Zörner, Björn; Bolliger, Marc; Curt, Armin; Berg, Daniela; Maetzler, Walter ORCID

Treadmill experiments suggest that left-dominant arm swing is common in healthy walking adults and is modulated by cognitive dual-tasking. Little is known about arm swing asymmetry in overground walking. We report directional (dASI) and non-directional arm swing symmetry indices (ndASI) from 334 adults (mean age 68.6 ± 5.9 y) walking overground at comfortable (NW) and fast (FW) speeds and while completing a serial subtraction task (DT). dASI and ndASI were calculated from sagittal shoulder range of motion data generated by inertial measurement units affixed to the wrist. Most (91%) participants were right-handed. Group mean arm swing amplitude was significantly larger on the left in all walking conditions. During NW, ndASI was 39.5 ± 21.8, with a dASI of 21.9 ± 39.5. Distribution of dASI was bimodal with an approximately 2:1 ratio of left:right-dominant arm swing. There were no differences in ndASI between conditions but dASI was smaller during DT compared to FW (15.2 vs 24.6; p = 0.009). Handedness was unrelated to ndASI, dASI or the change in ASI metrics under DT. Left-dominant arm swing is the norm in healthy human walking irrespective of walking condition or handedness. As disease markers, ndASI and dASI may have different and complementary roles.


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Killeen, Tim / Elshehabi, Morad / Filli, Linard / et al: Arm swing asymmetry in overground walking.. 2018.


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