Abstract：
:Patients with non-specific low back pain, or a similar disorder, may stiffen their trunk, which probably alters their walking coordination. To study the direct effects of increasing trunk stiffness, we experimentally increased trunk stiffness during walking, and compared the results with what is known from the literature about gait coordination with, e.g., low back pain. Healthy subjects walked on a treadmill at 3 speeds (0.5, 1.0 and 1.5m/s), in three conditions (normal, while contracting their abdominal muscles, or wearing an orthopedic brace that limits trunk motions). Kinematics of the legs, thorax and pelvis were recorded, and relative Fourier phases and amplitudes of segment motions were calculated. Increasing trunk stiffness led to a lower thorax-pelvis relative phase, with both a decrease in thorax-leg relative phase, and an increase in pelvis-leg relative phase, as well as reduced rotational amplitude of thorax relative to pelvis. While lower thorax-pelvis relative phase was also found in patients with low back pain, higher pelvis-leg relative phase has never been reported in patients with low back pain or related disorders. These results suggest that increasing trunk stiffness in healthy subjects causes short-term gait coordination changes which are different from those seen in patients with back pain.
journal_name
Hum Mov Scijournal_title
Human movement scienceauthors
Wu WH,Lin XC,Meijer OG,Gao JT,Hu H,Prins MR,Liang BW,Zhang LQ,Van Dieën JH,Bruijn SMdoi
10.1016/j.humov.2013.09.002subject
Has Abstractpub_date
2014-02-01 00:00:00pages
194-202eissn
0167-9457issn
1872-7646pii
S0167-9457(13)00145-0journal_volume
33pub_type
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