scholarly journals Influence of the Exoskeleton Training Course on the Energy Parameters of Walking in Patients with Multiple Sclerosis

2021 ◽  
Vol 20 (2) ◽  
pp. 29-41
Author(s):  
Kira A. Petrushanskaya ◽  
Sergey V. Kotov ◽  
Elena V. Pismennaya ◽  
Victoria Ju. Lizhdvoy ◽  
Vladimir I. Dotsenko
Keyword(s):  
Multiple Sclerosis ◽  
Electrical Activity ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Training Course ◽  
Energy Parameters ◽  
Remarkable Improvement ◽  
Total Integral ◽  
Walking Time ◽  
Femoris Muscle

Aim. To identify the features of changes in the energy parameters of walking in patients with multiple sclerosis (MS) and their correction under the influence of the of the exoskeleton training course. Material and methods. Authors of this article investigated electrical activity of two symmetrical thigh muscles – both m. rectus femoris and both m. biceps femoris during walking at different cadences – the slowest one, slow, decelerated, voluntary and fast in 3 patients with multiple sclerosis (MS). In addition to these parameters, the energy parameters of walking were also studied, namely, the average electrical activity of the muscles, equivalent to the power of the muscles, and the total integral for 10 m of the path, equivalent to the work of the muscles, taking into account both the pace and the length of the step. Results. The authors revealed the characteristic features of the energy parameters of walking in patients with multiple sclerosis, namely, a very slight increase in muscle power with an increase of walking velovity and the absence of the parabola second branch in the curve of the total integral for the distance of 10 m. On the basis of the received data authors make conclusion, that rezonance pnenomena are considerably diminished in patients with MS. The training exoskeleton walking method was developed, which includes the total training time, net walking time (walking time without rest), speed, pace and step length when walking in an exoskeleton, the number of steps taken by patients during the session and for the entire course. Remarkable improvement of the innervative structure of walking takes place after the course of training in the exoskeleton, that is revealed in considerable activity maximuma growth and in a number of cases – in apperance of these maxima, in concentration of these maxima in the locomotor cycle adequate phases, in appearance of the second maximum of activity in rectus femoris muscle and biceps femoris muscle in the swing phase of the locomotor cycle. Conclusion. All these positive changes were accompanied by an increase in the random walking speed and remarkable improvement of the energy walking parameters, namely, by considerable increase of the average electrical muscle activity and appearance of two parabola branches in the curve of the summary integral for the distance of 10 m, what points to appearance of the rezonance phenomena during walking in this patient.

scholarly journals Timing of Rectus Femoris and Biceps Femoris Muscle Activities in Both Legs at Maximal Running Speed

2020 ◽  
Vol Publish Ahead of Print ◽  
Author(s):  
Gaku Kakehata ◽  
Yuta Goto ◽  
Shigeo Iso ◽  
Kazuyuki Kanosue
Keyword(s):  
Rectus Femoris ◽  
Biceps Femoris ◽  
Running Speed ◽  
Biceps Femoris Muscle ◽  
Femoris Muscle

scholarly journals Effect of Changes in Cycle Ergometer Settings on Bioelectrical Activity in Selected Muscles of the Lower Limbs

2017 ◽  
Vol 24 (4) ◽  
pp. 228-234
Author(s):  
Robert Staszkiewicz ◽  
Michał Kawulak ◽  
Leszek Nosiadek ◽  
Jarosław Omorczyk ◽  
Andrzej Nosiadek
Keyword(s):  
Electrical Activity ◽  
Action Potentials ◽  
Tibialis Anterior ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Cycle Ergometer ◽  
Lower Limbs ◽  
Bioelectrical Activity ◽  
Vastus Medialis ◽  
Similarities And Differences

AbstractIntroduction. The aim of this study was to measure the duration of biopotentials in selected muscles of the lower limbs, evaluate the time of elevated bioelectrical activity in these muscles, and identify similarities and differences in electrical phenomena that occur in the muscles for various external settings of a cycle ergometer.Material and methods. The study examined 10 healthy people (5 women and 5 men) aged from 20 to 30 years. A cycle ergometer and EMG apparatus were used in the experiment. The bioelectrical activity of six muscles of the lower limbs (rectus femoris, vastus medialis, tibialis anterior, biceps femoris, gastrocnemius caput mediale, and gastrocnemius caput laterale) was recorded for four different settings of the cycle ergometer (variable saddle height and method of foot attachment to pedals). The EMG records were presented with reference to the bicycle crankset rotation cycle.Conclusions. The study found that changing the height of the saddle of the cycle ergometer and the use of toe clips in the pedals caused changes in bioelectrical activity in the muscles. The adjustment of saddle height affected the duration of potentials more noticeably than the use of toe clips. Furthermore, only one period of elevated electrical activity in the muscles of the lower limbs was found in the pedalling cycle. The longest time of the presence of action potentials was recorded for the m. gastrocnemius caput laterale, whereas the shortest time was observed in the m. vastus medialis.

scholarly journals Anticipatory Electromyographic Activity and Onset Time in Selected Muscles of Lower Limb Between the Active and Inactive Old Women

2019 ◽  
Vol 11 (2) ◽  
pp. 89-96
Author(s):  
Najme Noghani Ardestani ◽  
◽  
Rahman Sheikhhoseini ◽  
Farideh Babakhani ◽  
◽  
...  
Keyword(s):  
Lower Limb ◽  
Onset Time ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Activity Level ◽  
Lower Limbs ◽  
Electromyographic Activity ◽  
Biceps Femoris Muscle ◽  
Rectus Femoris Muscle ◽  
Femoris Muscle

Introduction: This study aimed to investigate the onset time and the electromyographic activity level of the selected lower limb muscles in the active and inactive old women. Materials and Methods: In this case-control study, 28 old women with a Mean±SD age of 61.07±0.88 years were selected in the inactive (15 people) and active (13 people) groups. The electrical activity of the selected muscles of the lower limbs was collected by the EMG device in a stair down movement. Results: The onset time of tibialis anterior, vastus lateralis, and biceps femoris muscles are faster in the active group (p <0.05). Besides, the activity level of the rectus femoris muscle in the interval of 100 ms before the initial contact and the ratio of the vastus medialis muscle to the biceps femoris muscle was significantly lower (p <0.05) in the active group. Conclusion: It seems that the muscles of the lower limbs in the group of women with regular physical activity are activated faster than the inactive group and the decrease in the activity of the rectus femoris muscle and the ratio of the vastus medialis to the biceps femoris muscle in the active women may be accompanied by fatigue and reduced intra-articular forces. Therefore, it is recommended that old women participate in regular and active exercise programs to improve their onset times of muscle activity.

BIOMECHANICAL AND ELECTROMYOGRAPHIC ANALYSIS OF THE MUSCULOSKELETAL ACTIVITY OF ATHLETES DURING WEIGHTLIFTING EXERCISES

2020 ◽  
Vol 8 (2) ◽  
pp. 56-66
Author(s):  
Yulia Koryagina ◽  
Sergei Nopin ◽  
Gukas Ter-Akopov
Keyword(s):  
Electrical Activity ◽  
Functional Status ◽  
Musculoskeletal System ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Power Characteristics ◽  
Starting Position ◽  
Motion System ◽  
First Case ◽  
Electromyographic Analysis

The purpose of the study was to develop a protocol for diagnostics and testing of the functional status of musculoskeletal system of weightlifters. Research methods and organization. The study involved elite weightlifters aged 18 to 25 years. Protocol development and testing was executed using the BTS Motion System (BTS Bioengineering, Italy). Results and discussion. Protocols of ‘jerk’ and ‘push’ competitive weightlifting exercises for the BTS motion system were developed for diagnostics and testing of the musculoskeletal system (MSS) of weightlifters. We used those protocols to determine the functional status of MSS of weightlifters by biomechanical and electromyographic characteristics. The study revealed differences in the functional status characteristics of the musculoskeletal system of male weightlifters performing the push exercise compared to women: women showed lower deviation values of the sports apparatus relative to the starting position, and men demonstrated higher velocity indicators of the sports apparatus. We identified the leg muscles experiencing the greatest load during weightlifting exercises: rectus femoris, biceps femoris, long peroneal muscle. We revealed the correlation between biomechanical characteristics of movements in various phases of weightlifting exercises and indicators of the electrical activity of the muscles providing these movements. Conclusion. Gender differences in the functional indices of MSS during jerk and push exercises are as follows: women show lower deviation values of the sports apparatus relative to the starting position, and men demonstrate higher velocity indicators of the sports apparatus. Shorter body and limbs of women in the first case, and better speed and strength abilities of men in the second case can explain it. Reduced initial electrical activity of the muscles, i.e. their relaxation, and the greatest activity in the same movement phase are favorable for the manifestation of speed-power characteristics of the subsequent movement.

Comparison of Muscle Activity Using Unstable Devices During a Forward Lunge

2020 ◽  
Vol 29 (4) ◽  
pp. 394-399
Author(s):  
Lucinda E. Bouillon ◽  
Michael Hofener ◽  
Andrew O’Donnel ◽  
Amanda Milligan ◽  
Craig Obrock
Keyword(s):  
Muscle Activity ◽  
Repeated Measures ◽  
Rectus Femoris ◽  
Random Order ◽  
Biceps Femoris ◽  
Lateral Gastrocnemius ◽  
Biceps Femoris Muscle ◽  
Repeated Measures Analysis ◽  
Closed Chain ◽  
Femoris Muscle

Context: Unstable devices in various forms are used as therapeutic adjuncts for prevention or following an injury. A slip-over-the-shoe design with inflatable domes (STEPRIGHT® Stability Trainer) was developed to improve balance. It is unknown how this unstable device affects muscle activity during a closed-chain exercise such as the forward lunge. Objective: To compare muscle activity across 3 surfaces (STEPRIGHT®, Both Sides Up [BOSU®] Balance Trainer, and firm) during a forward lunge. Design: Within-subject, repeated measures. Setting: University physical therapy research laboratory. Participants: A total of 20 healthy, recreationally active subjects (23.4 [1.47] y, 172.7 [14.7] cm, 71.6 [16.8] kg). Intervention: Each subject performed 1 set of 10 repetitions of forward lunge exercise in random order with STEPRIGHT®, BOSU®, and firm surface. Main Outcome Measures: Surface electromyography data, normalized to maximum voluntary isometric contractions (%MVIC), was used to assess muscle activity on rectus femoris, vastus medialis oblique (VMO), biceps femoris, lateral gastrocnemius, fibularis longus, and tibialis anterior. Results: The repeated-measures analysis of variance determined that there was a significant effect for surface type. During the descent of the lunge, the STEPRIGHT® elicited higher rectus femoris (33% [27%] MVIC) compared with BOSU® (22% [14%] MVIC) and VMO (44% [15%] MVIC) on STEPRIGHT® compared with firm (38% [11%] MVIC) (P < .05). During the ascent of the lunge, the rectus femoris (38% [27%] MVIC) using STEPRIGHT® was higher than BOSU® (24% [16%] MVIC), and STEPRIGHT® elicited higher VMO (65% [20%] MVIC) versus BOSU® (56% [19%] MVIC) (P ≤ .01). The STEPRIGHT® for fibularis longus was higher (descent: 51% [20%] MVIC, ascent: 52% [22%] MVIC) than BOSU® (descent: 36% [15%] MVIC, ascent: 33% [16%] MVIC) or firm (descent: 33% [12%] MVIC, ascent: 35% [15%] MVIC) (P < .001). Conclusions: Clinicians may choose to use the STEPRIGHT® for strengthening VMO and fibularis longus muscles, as these were over 41% MVIC or any of the 3 surfaces for endurance training (<25% MVIC) for biceps femoris muscle. This information may be helpful in exercise dosage for forward lunges when using STEPRIGHT®, BOSU®, or a firm surface.

scholarly journals Relationship between Muscular Activity and Postural Control Changes after Proprioceptive Focal Stimulation (Equistasi®) in Middle-Moderate Parkinson’s Disease Patients: An Explorative Study

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 560
Author(s):  
Fabiola Spolaor ◽  
Marco Romanato ◽  
Guiotto Annamaria ◽  
Antonella Peppe ◽  
Leila Bakdounes ◽  
...  
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Postural Control ◽  
Quantitative Estimation ◽  
Force Plate ◽  
Muscular Activity ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Eyes Open ◽  
Romberg Test

The aim of this study was to investigate the effects of Equistasi®, a wearable device, on the relationship between muscular activity and postural control changes in a sample of 25 Parkinson’s disease (PD) subjects. Gait analysis was carried out through a six-cameras stereophotogrammetric system synchronized with two force plates, an eight-channel surface electromyographic system, recording the activity of four muscles bilaterally: Rectus femoris, tibialis anterior (TA), biceps femoris, and gastrocnemius lateralis (GL). The peak of the envelope (PoE) and its occurrence within the gait cycle (position of the peak of the envelope, PPoE) were calculated. Frequency-domain posturographic parameters were extracted while standing still on a force plate in eyes open and closed conditions for 60 s. After the treatment with Equistasi®, the mid-low (0.5–0.75) Hz and mid-high (0.75–1 Hz) components associated with the vestibular and somatosensory systems, PoE and PPoE, displayed a shift toward the values registered on the controls. Furthermore, a correlation was found between changes in proprioception (power spectrum frequencies during the Romberg Test) and the activity of GL, BF (PoE), and TA (PPoE). Results of this study could provide a quantitative estimation of the effects of a neurorehabilitation device on the peripheral and central nervous system in PD.

Lower-Extremity Muscle Activity During Aquatic and Land Treadmill Running at the Same Speeds

2014 ◽  
Vol 23 (2) ◽  
pp. 107-122 ◽  
Author(s):  
W. Matthew Silvers ◽  
Eadric Bressel ◽  
D. Clark Dickin ◽  
Garry Killgore ◽  
Dennis G. Dolny
Keyword(s):  
Lower Extremity ◽  
Outcome Measures ◽  
Muscle Activity ◽  
Tibialis Anterior ◽  
Rectus Femoris ◽  
Biceps Femoris ◽  
Swing Phase ◽  
Treadmill Running ◽  
Vastus Medialis ◽  
Lower Extremity Muscle

Context:Muscle activation during aquatic treadmill (ATM) running has not been examined, despite similar investigations for other modes of aquatic locomotion and increased interest in ATM running.Objectives:The objectives of this study were to compare normalized (percentage of maximal voluntary contraction; %MVC), absolute duration (aDUR), and total (tACT) lower-extremity muscle activity during land treadmill (TM) and ATM running at the same speeds.Design:Exploratory, quasi-experimental, crossover design.Setting:Athletic training facility.Participants:12 healthy recreational runners (age = 25.8 ± 5 y, height = 178.4 ± 8.2 cm, mass = 71.5 ± 11.5 kg, running experience = 8.2 ± 5.3 y) volunteered for participation.Intervention:All participants performed TM and ATM running at 174.4, 201.2, and 228.0 m/min while surface electromyographic data were collected from the vastus medialis, rectus femoris, gastrocnemius, tibialis anterior, and biceps femoris.Main Outcome Measures:For each muscle, a 2 × 3 repeated-measures ANOVA was used to analyze the main effects and environment–speed interaction (P ≤ .05) of each dependent variable: %MVC, aDUR, and tACT.Results:Compared with TM, ATM elicited significantly reduced %MVC (−44.0%) but increased aDUR (+213.1%) and tACT (+41.9%) in the vastus medialis, increased %MVC (+48.7%) and aDUR (+128.1%) in the rectus femoris during swing phase, reduced %MVC (−26.9%) and tACT (−40.1%) in the gastrocnemius, increased aDUR (+33.1%) and tACT (+35.7%) in the tibialis anterior, and increased aDUR (+41.3%) and tACT (+29.2%) in the biceps femoris. At faster running speeds, there were significant increases in tibialis anterior %MVC (+8.6−15.2%) and tACT (+12.7−17.0%) and rectus femoris %MVC (12.1−26.6%; swing phase).Conclusion:No significant environment–speed interaction effects suggested that observed muscle-activity differences between ATM and TM were due to environmental variation, ie, buoyancy (presumed to decrease %MVC) and drag forces (presumed to increase aDUR and tACT) in the water.

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