scholarly journals Training for Walking Efficiency With a Wearable Hip-Assist Robot in Patients With Stroke

Stroke ◽  
2019 ◽  
Vol 50 (12) ◽  
pp. 3545-3552 ◽  
Author(s):  
Hwang-Jae Lee ◽  
Su-Hyun Lee ◽  
Keehong Seo ◽  
Minhyung Lee ◽  
Won Hyuk Chang ◽  
...  
Keyword(s):  
Walking Efficiency

scholarly journals Cardiorespiratory Responses to 10 Weeks of Exoskeleton-Assisted Overground Walking Training inChronic Nonambulatory Patients with Spinal Cord Injury

Sensors ◽  
2021 ◽  
Vol 21 (15) ◽  
pp. 5022
Author(s):  
Jae Hyeon Park ◽  
Hyeon Seong Kim ◽  
Seong Ho Jang ◽  
Dong Jin Hyun ◽  
Sang In Park ◽  
...  
Keyword(s):  
Spinal Cord ◽  
Spinal Cord Injury ◽  
Oxygen Consumption ◽  
Exercise Intensity ◽  
Moderate Physical Activity ◽  
Intensity Level ◽  
Cardiorespiratory System ◽  
Cardiorespiratory Responses ◽  
Cord Injury ◽  
Walking Efficiency

Exercise intensity of exoskeleton-assisted walking in patients with spinal cord injury (SCI) has been reported as moderate. However, the cardiorespiratory responses to long-term exoskeleton-assisted walking have not been sufficiently investigated. We investigated the cardiorespiratory responses to 10 weeks of exoskeleton-assisted walking training in patients with SCI. Chronic nonambulatory patients with SCI were recruited from an outpatient clinic. Walking training with an exoskeleton was conducted three times per week for 10 weeks. Oxygen consumption and heart rate (HR) were measured during a 6-min walking test at pre-, mid-, and post-training. Exercise intensity was determined according to the metabolic equivalent of tasks (METs) for SCI and HR relative to the HR reserve (%HRR). Walking efficiency was calculated as oxygen consumption divided by walking speed. The exercise intensity according to the METs (both peak and average) corresponded to moderate physical activity and did not change after training. The %HRR demonstrated a moderate (peak %HRR) and light (average %HRR) exercise intensity level, and the average %HRR significantly decreased at post-training compared with mid-training (31.6 ± 8.9% to 24.3 ± 7.3%, p = 0.013). Walking efficiency progressively improved after training. Walking with an exoskeleton for 10 weeks may affect the cardiorespiratory system in chronic patients with SCI.

scholarly journals The Longitudinal Association of Walking Efficiency With Brain Volumes in Community-Dwelling Older Adults

2020 ◽  
Vol 4 (Supplement_1) ◽  
pp. 783-783
Author(s):  
Jennifer Schrack ◽  
Fangyu Liu ◽  
Amal Wanigatunga ◽  
Yang An ◽  
Christos Davatzikos ◽  
...  
Keyword(s):  
Region Of Interest ◽  
Cognitive Status ◽  
Community Dwelling ◽  
Intracranial Volume ◽  
Brain Volumes ◽  
Age Related ◽  
Lower Baseline ◽  
Longitudinal Association ◽  
Mri Scans ◽  
Walking Efficiency

Abstract Walking efficiency (WE) predicts mobility decline and is linked with higher fatigability. Fatigability is associated with cognitive decline and reduced brain volumes (BV), but the link between WE and BV is undefined. We examined associations between WE and BV in 860 participants of the BLSA (mean age 66.4(14.4) years, 54.5% women). WE was assessed during 2.5-minutes of usual-paced walking using indirect calorimetry and standardized per meter (ml/kg/m). BV measures were derived using MRI scans and an automated multi-atlas region-of-interest approach. In linear mixed models adjusted for demographics, education, BMI, intracranial volume, and cognitive status, lower baseline WE was associated with lower total, white, and gray matter, primarily in the frontal and temporal lobes (all p<0.05). Longitudinally, declining WE was associated with increasing ventricular and decreasing hippocampal volumes over follow-up (all p<0.01). Findings suggest rising age-related inefficiencies may reflect underlying brain atrophy and serve as a novel indicator for future interventions.

scholarly journals Effects of upper body parameters on biped walking efficiency studied by dynamic optimization

2016 ◽  
Vol 14 (1) ◽  
pp. 172988141668270 ◽  
Author(s):  
Kang An ◽  
Chuanjiang Li ◽  
Zuhua Fang ◽  
Chengju Liu
Keyword(s):  
Body Length ◽  
Dynamic Optimization ◽  
Optimal Solution ◽  
Optimization Method ◽  
Step Length ◽  
Joint Torque ◽  
Upper Body ◽  
Walking Gait ◽  
Body Parameters ◽  
Walking Efficiency

Walking efficiency is one of the considerations for designing biped robots. This article uses the dynamic optimization method to study the effects of upper body parameters, including upper body length and mass, on walking efficiency. Two minimal actuations, hip joint torque and push-off impulse, are used in the walking model, and minimal constraints are set in a free search using the dynamic optimization. Results show that there is an optimal solution of upper body length for the efficient walking within a range of walking speed and step length. For short step length, walking with a lighter upper body mass is found to be more efficient and vice versa. It is also found that for higher speed locomotion, the increase of the upper body length and mass can make the walking gait optimal rather than other kind of gaits. In addition, the typical strategy of an optimal walking gait is that just actuating the swing leg at the beginning of the step.

scholarly journals ASSOCIATION BETWEEN WALKING ENERGETICS AND FRAGMENTED PHYSICAL ACTIVITY IN MID-TO-LATE LIFE

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S865-S865
Author(s):  
Fangyu Liu ◽  
Amal A Wanigatunga ◽  
Pei-Lun Kuo ◽  
Vadim Zipunnikov ◽  
Eleanor M Simonsick ◽  
...  
Keyword(s):  
Physical Activity ◽  
Transition Probability ◽  
Functional Decline ◽  
Average Energy ◽  
Energetic Cost ◽  
Energy Regulation ◽  
Accelerometer Data ◽  
Linear Regression Models ◽  
Capacity Ratio ◽  
Walking Efficiency

Abstract Physical activity becomes increasingly fragmented with age, and may be an early marker of functional decline. Energy regulation has been linked with functional decline, yet whether the energy needed for walking, a common type of physical activity, is related to fragmentation of physical activity remains unknown. The study population included 493 participants aged 50-93 years from the Baltimore Longitudinal Study of Aging. Energetic measures included the energetic cost of usual-paced overground walking (ml/kg/m), the average energy expended (ml/kg/min) during a rapid-paced 400-m walk, and a cost-to-capacity ratio between the energy expended during 5-min treadmill walk (0.67 m/s, 0% grade) and the energy expended during the 400-m walk. Activity fragmentation was extracted from accelerometer data collected over ≥3 valid days and quantified via an active-to-sedentary transition probability (ASTP). Associations between the energetic measures and ASTP were assessed using multivariate linear regression models. Interactions between energetics and total daily physical activity, quantified as total log-transformed activity counts (TLAC), were also assessed. After adjusting for TLAC, demographics, body composition and comorbidity, higher cost-to-capacity ratio was associated with 3.51% greater fragmented physical activity (p=0.005). Energetics by TLAC interactions revealed that lower rapid-paced walking energy expenditure and higher cost-to-capacity ratio were only significantly associated with greater fragmentation in the most sedentary participants (p<0.01 for both). Our results suggest that deterioration of walking efficiency may manifest as a more fragmented physical activity profile, especially among sedentary adults. Future longitudinal studies to understand whether declining walking efficiency predicts the onset and progression of activity fragmentation are warranted.

scholarly journals Influences of Spatio-Temporal Gait Parameters on Walking Efficiency of Children with Cerebral Palsy

2009 ◽  
Vol 24 (2) ◽  
pp. 155-159
Author(s):  
Minoru KIMOTO ◽  
Yasuko NORO ◽  
Chizuru KATOU ◽  
Takanori KONDO ◽  
Hiroaki NAKANO ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Gait Parameters ◽  
Children With Cerebral Palsy ◽  
Spatio Temporal ◽  
Walking Efficiency

Gait analysis of patients in early stages after total hip arthroplasty: effect of lateral trunk displacement on walking efficiency

2007 ◽  
Vol 12 (6) ◽  
pp. 550-554 ◽  
Author(s):  
Manabu Nankaku ◽  
Tadao Tsuboyama ◽  
Ryosuke Kakinoki ◽  
Kawanabe Keiichi ◽  
Hideto Kanzaki ◽  
...  
Keyword(s):  
Total Hip Arthroplasty ◽  
Gait Analysis ◽  
Hip Arthroplasty ◽  
Total Hip ◽  
Early Stages ◽  
Walking Efficiency

Walking efficiency assessment through the analysis of mechanical energy and energy recovery index

2013 ◽  
Author(s):  
Firooz Salami ◽  
Mariangela Dipaola ◽  
Alberto Marzegan ◽  
Ioannis Ugo Isaias ◽  
Carlo Albino Frigo
Keyword(s):  
Energy Recovery ◽  
Mechanical Energy ◽  
Efficiency Assessment ◽  
Recovery Index ◽  
Walking Efficiency

scholarly journals Effects of the Ankle Function of the Prosthetic Foot on Walking Efficiency

Biomechanisms ◽  
2018 ◽  
Vol 24 (0) ◽  
pp. 103-113
Author(s):  
Gai HIGUCHI ◽  
Keisuke KON ◽  
Yasuyuki HAYAKAWA ◽  
Toshiya NOSAKA
Keyword(s):  
Prosthetic Foot ◽  
Ankle Function ◽  
Walking Efficiency

scholarly journals Obesity and Walking Efficiency in Survivors of Acute Lymphoblastic Leukemia

2018 ◽  
Vol 50 (5S) ◽  
pp. 584
Author(s):  
Matthew D. Wogksch ◽  
Carrie R. Howell ◽  
Robyn E. Partin ◽  
Heather Chambliss ◽  
Hiroto Inaba ◽  
...  
Keyword(s):  
Acute Lymphoblastic Leukemia ◽  
Lymphoblastic Leukemia ◽  
Walking Efficiency
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