Related Papers
Gait & Posture
Time-varying behaviour, test–retest reliability and concurrent validity of lateral trunk lean and toe-out angles during prolonged treadmill walking
2011 •
Daniel Bechard
Neuro Endocrinology Letters
Knee joint muscles neuromuscular activity during load-carrying walking
2014 •
Karel Jelen
Objective: To investigate the effects of increasing load on changes in the muscle activity ratio and onset of vastus medialis (VM), vastus lateralis (VL) and biceps femoris (BF) during load-carrying walking. Materials and methods: Sixteen strength-trained men performed an isometric test for knee flexion/extension using a dynamometer followed by walking with progressively increasing loads of up to 75% of their body mass (BM). During the isometric tests and load-carrying walking, electromyography (EMG) data were collected from the VM, VL and BF in both legs together with 3D kinematics. Results: Significant changes in the activity ratio were found for the VM/VL (F3,93=5.92, p=0.0001) and VL onset (F3,81=6.8, p=0.0004). Other parameters showed no significant differences. VM/VL was significantly reduced between the 50BM (mean±SD: 0.89±0.4) and the 75BM condition (0.81±0.3). VL onset was significantly accelerated between the BM (26.11±8) compare and the 25% BM (19.47±9), 50% BM (21.21±10) and 75% BM (15.45±6) conditions. Conclusion: Load-carrying walking is an exercise and movement activity that increases the activity of VL more than the activity of VM and accelerates the VL action together with the increased load, which can negatively influence knee stability. The VM/VL ratio and onset is equal when walking under weight-bearing conditions. The inter-muscular coordination is changed due to the increased load in complex movements even in individuals with high level of neuromuscular adaptation.
Gait & Posture
Temporal relationship between trunk and thigh contributes to balance control in load carriage walking
2011 •
Gregory Gutierrez
Gait & posture
Reduction of frontal plane knee load caused by lateral trunk lean depends on step width
2018 •
Lakshminarayan Ranganath
The internal knee abduction moment (KAM) in osteoarthritis is reduced by increased lateral trunk lean (TL). Mechanistically, this occurs as the Centre of Mass (COM) moves further over the stance leg. Since the size of the base of support constrains the COM, an associated increase in step width (SW) would be expected to maintain stability. This study tested the effects of TL on SW and KAM in healthy participants (n = 21) who performed normal and 6° TL walks. The latter was controlled via audio-visual biofeedback. We found two distinct gait strategies in TL walk: widening the step width substantially (>50%) to permit an increase in the COM displacement (WSW, n = 13), or maintaining a baseline SW and minimally displacing the COM by moving the hip/pelvic complex in the opposite direction (NSW, n = 8). WSW doubled SW (11.3 ± 2.4 v. 24.7 ± 5.5 cm, p < .0001), NSW did not change SW (12.2 ± 2.8 v. 13.7 ± 4.7 cm, p > .05). These two distinct gait strategies resulted in unique patter...
Journal of Sport Rehabilitation
Hip- and Trunk-Muscle Activation Patterns During Perturbed Gait
2011 •
Justin Stanek
Context:Selected muscles in the kinetic chain may help explain the body’s ability to avert injury during unexpected perturbation.Objective:To determine the activation of the ipsilateral rectus femoris (RF), gluteus maximus (MA), gluteus medius (ME), and contralateral external obliques (EO) during normal and perturbed gait.Design:Single-factor, repeated measures.Setting:University research laboratory.Participants:32 physically active, college-age subjects.Intervention:Subjects walked a total of 20 trials the length of a 6.1-m custom runway capable of releasing either side into 30° of unexpected inversion. During 5 trials, the platform released into inversion.Main Outcome Measures:Average, peak, and time to peak EMG were analyzed across the 4 muscles, and comparisons were made between the walking trials and perturbed trials.Results:Significantly higher average and peak muscle activity were noted for the perturbed condition for RF, MA, and EO. Time to peak muscle activity was faster du...
Archives of Physical Medicine and Rehabilitation
The Associations Between the Dominant and Nondominant Peak External Knee Adductor Moments During Gait in Healthy Subjects: Evidence for Symmetry
2009 •
Meg Morris
Journal of Biomechanics
Knee Adduction Moment and Medial Contact Force – Facts About the Correlation During Gait
2012 •
Markus Heller
Journal of Orthopaedic Research
Knee extensor and flexor dominant gait patterns increase the knee frontal plane moment during walking
2013 •
Juha-Pekka Kulmala, Sami Äyrämö
The Journal of Physiology
Interlimb communication to the knee flexors during walking in humans
2013 •
Natalie Mrachacz-Kersting
Journal of Physical Therapy Science
Effects of walking with a “draw-in maneuver” on the knee adduction moment and hip muscle activity
2021 •
Cucu Nurjanah
