An Optimal Method of Training the Specific Lower Limb Muscle Group Using an Exoskeletal Robot

2018 ◽  
Vol 26 (4) ◽  
pp. 830-838 ◽  
Author(s):  
Beomsoo Hwang ◽  
Byung-Mo Oh ◽  
Doyoung Jeon
Keyword(s):  
Lower Limb ◽  
Muscle Group ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Optimal Method

scholarly journals Grey Relational Analysis of Lower Limb Muscle Fatigue and Pedalling Performance Decline of Elite Athletes during a 30-Second All-Out Sprint Cycling Exercise

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Lejun Wang ◽  
Hua Yang ◽  
Guoqiang Ma ◽  
Mingxin Gong ◽  
Wenxin Niu ◽  
...  
Keyword(s):  
Muscle Fatigue ◽  
Exercise Performance ◽  
Lower Limb ◽  
Muscle Group ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Cycling Exercise ◽  
Performance Decline ◽  
Sprint Cycling ◽  
Grey Relational

The 30-second all-out sprint cycling exercise is a classical sport capacity evaluation method, which may cause severe lower limb muscle fatigue. However, the relationship between lower limb muscle fatigue and the decline in exercise performance during 30-second sprint cycling remains unclear. In this study, ten cyclists volunteered to participate in a 30-second all-out sprint cycling while power, cadence, and surface electromyographic (EMG) signals of eight lower limb muscles were recorded during the exercise. EMG mean frequency (MNF) of each lower limb muscle group was computed for every 3-second epoch based on wavelet packet transformation. Grey relational grades between pedalling performance and the EMG MNF of each lower limb muscle group during the whole process were calculated. The results demonstrated that EMG MNF of the rectus femoris (RF), vastus (VAS), gastrocnemius (GAS), and tibialis anterior (TA) progressively tired during a 30-second all-out sprint cycling exercise. Of the muscles evaluated, the degree of fatigue of TA showed the greatest association with exercise performance decline, whereas the muscle fatigue of RF, VAS, and GAS also significantly impacted exercise performance during a 30-second all-out sprint cycling exercise.

scholarly journals Age-related Changes in Lower Limb Muscle-group Roles in Maximum Step Length and Gait

2017 ◽  
Vol 32 (2) ◽  
pp. 171-175
Author(s):  
Yoko SAKURAI ◽  
Naoya TAKEICHI ◽  
Seiichiro SUGIMURA ◽  
Setsu IIJIMA
Keyword(s):  
Lower Limb ◽  
Step Length ◽  
Muscle Group ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Age Related ◽  
Group Roles ◽  
Age Related Changes

4 Case Reports On Patients with Acute Lower Limb Muscle Weakness Treated by Spinal Mobilization With Leg Movement(SMWLM) Combined with Korean Medicine Treatment

2020 ◽  
Vol 15 (2) ◽  
pp. 63-73
Author(s):  
Young-Joo Moon ◽  
Won-Bin Shin ◽  
Gwang-Hyun Ryu ◽  
Ji-Yun Lee ◽  
Hyun-A Jeon ◽  
...  
Keyword(s):  
Muscle Weakness ◽  
Lower Limb ◽  
Case Reports ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Korean Medicine ◽  
Leg Movement

scholarly journals Reduced Lower-Limb Muscle Strength and Volume in Patients With Type 2 Diabetes in Relation to Neuropathy, Intramuscular Fat, and Vitamin D Levels

Diabetes Care ◽  
2016 ◽  
Vol 39 (3) ◽  
pp. 441-447 ◽  
Author(s):  
Monirah M. Almurdhi ◽  
Neil D. Reeves ◽  
Frank L. Bowling ◽  
Andrew J.M. Boulton ◽  
Maria Jeziorska ◽  
...  
Keyword(s):  
Type 2 Diabetes ◽  
Vitamin D ◽  
Muscle Strength ◽  
Lower Limb ◽  
Intramuscular Fat ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Vitamin D Levels

scholarly journals Effects of Dominant and Nondominant Limb Immobilization on Muscle Activation and Physical Demand during Ambulation with Axillary Crutches

2021 ◽  
Vol 6 (1) ◽  
pp. 16
Author(s):  
Kara B. Bellenfant ◽  
Gracie L. Robbins ◽  
Rebecca R. Rogers ◽  
Thomas J. Kopec ◽  
Christopher G. Ballmann
Keyword(s):  
Lower Limb ◽  
Muscle Activation ◽  
Weight Bearing ◽  
Lower Limbs ◽  
Medial Gastrocnemius ◽  
Bipedal Walking ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Physical Demand ◽  
Limb Dominance

The purpose of this study was to investigate the effects of how limb dominance and joint immobilization alter markers of physical demand and muscle activation during ambulation with axillary crutches. In a crossover, counterbalanced study design, physically active females completed ambulation trials with three conditions: (1) bipedal walking (BW), (2) axillary crutch ambulation with their dominant limb (DOM), and (3) axillary crutch ambulation with their nondominant limb (NDOM). During the axillary crutch ambulation conditions, the non-weight-bearing knee joint was immobilized at a 30-degree flexion angle with a postoperative knee stabilizer. For each trial/condition, participants ambulated at 0.6, 0.8, and 1.0 mph for five minutes at each speed. Heart rate (HR) and rate of perceived exertion (RPE) were monitored throughout. Surface electromyography (sEMG) was used to record muscle activation of the medial gastrocnemius (MG), soleus (SOL), and tibialis anterior (TA) unilaterally on the weight-bearing limb. Biceps brachii (BB) and triceps brachii (TB) sEMG were measured bilaterally. sEMG signals for each immobilization condition were normalized to corresponding values for BW.HR (p < 0.001) and RPE (p < 0.001) were significantly higher for both the DOM and NDOM conditions compared to BW but no differences existed between the DOM and NDOM conditions (p > 0.05). No differences in lower limb muscle activation were noted for any muscles between the DOM and NDOM conditions (p > 0.05). Regardless of condition, BB activation ipsilateral to the ambulating limb was significantly lower during 0.6 mph (p = 0.005) and 0.8 mph (p = 0.016) compared to the same speeds for BB on the contralateral side. Contralateral TB activation was significantly higher during 0.6 mph compared to 0.8 mph (p = 0.009) and 1.0 mph (p = 0.029) irrespective of condition. In conclusion, limb dominance appears to not alter lower limb muscle activation and walking intensity while using axillary crutches. However, upper limb muscle activation was asymmetrical during axillary crutch use and largely dependent on speed. These results suggest that functional asymmetry may exist in upper limbs but not lower limbs during assistive device supported ambulation.

scholarly journals Peripheral Blood T Cell Gene Expression Responses to Exercise and HMB in Sarcopenia

Nutrients ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 2313
Author(s):  
Suk-Ling Ma ◽  
Junyi Wu ◽  
Liuying Zhu ◽  
Ruth Chan ◽  
Amy Wang ◽  
...  
Keyword(s):  
Gene Expression ◽  
T Cell ◽  
Lower Limb ◽  
Exercise Program ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Strength Performance ◽  
Leg Extension ◽  
Cell Gene Expression ◽  
Cell Gene

Background: Sarcopenia is a major health problem in older adults. Exercise and nutrient supplementation have been shown to be effective interventions but there are limited studies to investigate their effects on the management of sarcopenia and its possible underlying mechanisms. Here, we studied T cell gene expression responses to interventions in sarcopenia. Methods: The results of this study were part of a completed trial examining the effectiveness of a 12-week intervention with exercise and nutrition supplementation in community-dwelling Chinese older adults with sarcopenia, based on the available blood samples at baseline and 12 weeks from 46 randomized participants from three study groups, namely: exercise program alone (n = 11), combined-exercise program and nutrition supplement (n = 23), and waitlist control group (n = 12). T cell gene expression was evaluated, with emphasis on inflammation-related genes. Real-time PCR (RT-PCR) was performed on CD3 T cells in 38 selected genes. Correlation analysis was performed to relate the results of gene expression analysis with lower limb muscle strength performance, measured using leg extension tests. Results: Our results showed a significant improvement in leg extension for both the exercise program alone and the combined groups (p < 0.001). Nine genes showed significant pre- and post-difference in gene expression over 12 weeks of intervention in the combined group. Seven genes (RASGRP1, BIN1, LEF1, ANXA6, IL-7R, LRRN3, and PRKCQ) showed an interaction effect between intervention and gene expression levels on leg extension in the confirmatory analysis, with confounder variables controlled and FDR correction. Conclusions: Our findings showed that T cell-specific inflammatory gene expression was changed significantly after 12 weeks of intervention with combined exercise and HMB supplementation in sarcopenia, and that this was associated with lower limb muscle strength performance.

The immediate effect of foot orthoses on gluteal and lower limb muscle activity during overground walking in healthy young adults

2021 ◽  
Vol 89 ◽  
pp. 102-108
Author(s):  
Adam I. Semciw ◽  
Viji N. Visvalingam ◽  
Charlotte Ganderton ◽  
Peter Lawrenson ◽  
Paul W. Hodges ◽  
...  
Keyword(s):  
Young Adults ◽  
Lower Limb ◽  
Muscle Activity ◽  
Foot Orthoses ◽  
Lower Limb Muscle ◽  
Limb Muscle ◽  
Overground Walking
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