Propulsive force generation is critical to walking speed. Trialing limb angle and ankle moment are major contributors increases in propulsive during gait. For able-bodied individuals, trailing contributes twice as much speed modulation. The aim of this study was quantify the relative contribution for individuals poststroke. A biomechanical-based model previously developed evaluated enhanced Gait analysis performed subjects (N = 24) with chronic poststroke hemiparesis walked at their...

Chronic Ankle Instability (CAI) is a condition characterized by giving-way episodes, instability and recurrent ankle sprains. Poor sleep can increase the risk of musculoskeletal injury known to be an important aspect recovery. However, effect has on those with CAI as well its for episodes remains unclear. The purpose this study was examine relationship between behaviour associated CAI. Twenty-five participants (11 M/14 F, age = 22.9 ± 2.7 years, height 171.9 8.9 cm, mass 76.7 15.9 kg) were...

Objective The purposes of this study were to (1) investigate muscle co-contraction during aquatic (Wet) and conventional (Dry) treadmill walking at various speeds in typically developing (TD) children with cerebral palsy (CP) (2) explore how the clinical interpretation co-contraction, using indices (CCI), may vary depending on method employed. Methods Fifteen TD (30 limbs, 7 M | 8F, 11.3 ± 4.1 yrs., 1.46 0.18 m, 44.2 16.8 kg) 10 CP (20 6 4F, 13.1 3.5 1.54 53.2 26.2 kg, GMFCS I 3 II)...

A common goal of persons post-stroke is to regain community ambulation. The plantar flexor muscles play an important role in propulsion generation and swing initiation as previous musculoskeletal simulations have shown. purpose this study was demonstrate that simulation results quantifying changes activation function individuals were consistent with (1) the intervention designed enhance (2) expected muscle during gait based on literature.Three-dimensional, forward dynamic created determine...

Robot-assisted training is a promising tool under development for improving walking function based on repetitive goal-oriented task practice. The challenges in developing the controllers gait devices that promote desired changes complicated by limited understanding of human response to robotic input. A possible method controller formulation can be principle bio-inspiration, where robot controlled apply change joint moment applied subjects when they achieve feature interest. However, it...

Post-stroke muscle weakness is commonly thought to be the result of a combination decreased voluntary activation and maximum force generating ability (MFGA). We assessed volumes obtained using MRI estimate MFGA plantar flexor group in individuals post-stroke.MRI was used measure volume 17 with post-stroke hemiparesis. A modified burst superimposition test volitional contraction predict flexors.While by means provided information on overall size muscle, it overestimated paretic...

The Timed Up and Go (TUG) test has been frequently used to assess the risk of falls in older adults because it is an easy, fast, simple method examining functional mobility balance without special equipment. purpose this study develop a model that predicts TUG using three-dimensional acceleration data collected from wearable sensors during normal walking. We recruited 37 for outdoor walking task, seven inertial measurement unit (IMU)-based were attached each participant. elastic net ridge...

Total knee arthroplasty is a common surgical treatment for end-stage osteoarthritis of the knee. The majority existing studies that have explored relationship between recovery and gait biomechanics been conducted in laboratory settings. However, seamless parameter monitoring real-world conditions may provide better understanding post-surgery. purpose this study was to estimate kinematic kinetic variables using two ankle-worn wearable sensors individuals after unilateral total arthroplasty....

Longitudinal laboratory study.(1) To compare gait characteristics between individuals with early-stage hip osteoarthritis who underwent total replacement (THR) and those did not undergo THR, (2) to evaluate whether characteristics, function, symptoms declined among THR during a 6- 7-year follow-up.The natural history of symptoms, changes secondary osteoarthritis, including potential differences at an early stage disease, is unknown.Forty-three (mean age, 58.9 years) radiographic symptomatic...

Introduction Many individuals with stroke still have functional difficulties their affected hand after going through a rehabilitation program. A 3D printed upper limb exoskeleton was designed for an individual who had stroke. Functional and neuromuscular outcomes were measured using his without passive exoskeleton. The goal of this study to determine the changes induced by in participant stroke.Materials methods ability assessed Fugl-Meyer Assessment Box Block Test. Strength testing muscle...

Co-contraction is the simultaneous activation of agonist and antagonist muscles that produces forces around a joint. It unknown if use wrist-driven 3D printed transitional prostheses has any influence on neuromuscular motor control strategies affected hand children with unilateral upper-limb reduction deficiencies. Thus, purpose current investigation was to examine coactivation index (CI) congenital deficiencies before after 6 months using partial prosthesis. Electromyographic activity wrist...

AbstractThe relationship between obesity, weight gain and progression of knee osteoarthritis is well supported, suggesting that excessive joint loading may be a mechanism responsible for cartilage deterioration. Examining the influence on compressive forces difficult, as both muscles ground reaction can have significant impact experienced during gait. While previous studies examined body forces, these used models were not validated using experimental data. Therefore, objective this study was...

The purpose of this study was to examine the effect sampling epoch on total time spent walking and number bouts per day in persons with stroke. Ninety-eight average age 63.8 yr poststroke 43.6 mo participated. Participants wore a StepWatch Activity Monitor for 3 5 consecutive days. strides taken collected s epochs down sampled into 10, 20, 30, 60 epochs. Total were determined each day. Low activity days defined as below 25th percentile steps high above 75th different (p < 0.001 all)....

Muscle weakness is commonly seen in individuals after stroke, characterized by lower forces during a maximal volitional contraction. Accurate quantification of muscle paramount when evaluating individual performance and response to stroke rehabilitation. The objective this study was examine the effect subject-specific force activation deficits on predicted coordination using musculoskeletal models for stroke. Maximum generating ability central ratio paretic plantar flexors, dorsiflexors,...