scholarly journals Static balance adaptations after neuromuscular electrical stimulation on quadriceps and lumbar paraspinal muscles in healthy elderly

2021 ◽  
Author(s):  
Danilo Bondi ◽  
Tereza Jandova ◽  
Vittore Verratti ◽  
Moreno D’Amico ◽  
Edyta Kinel ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Balance Control ◽  
Neuromuscular Electrical Stimulation ◽  
Static Balance ◽  
Paraspinal Muscles ◽  
Combined Training ◽  
Healthy Elderly ◽  
Age Related ◽  
Paravertebral Muscles ◽  
Lumbar Paraspinal Muscles

Abstract Background Strength training as neuromuscular electrical stimulation (NMES) is effective in counteracting age-related postural impairments in elderly. However, it remains unknown whether training different muscle groups would entail in different adaptations. Aim To evaluate the effect of NMES training on balance function in healthy inactive elderly, targeting paravertebral muscles, in addition to thigh muscles. Methods Eleven healthy elderly were trained with NMES for 8 week allocated to combined training (CT: quadriceps and lumbar paraspinal muscles) or to quadriceps training (QT), after completing lifestyle questionnaire and spine morphology measurements. Functional balance, static stabilometry, and isometric strength tests were assessed before and after the training period. Results and conclusion The CT group showed a greater improve in static balance control, i.e., reducing the CEA of the CoP displacement from 99 ± 38 to 76 ± 42 mm2 (Cohen’s d = 0.947). Benefits for improving static balance through CT might be due to NMES training, which increases spinal stabilization.

scholarly journals A single session of neuromuscular electrical stimulation does not augment postprandial muscle protein accretion

2016 ◽  
Vol 311 (1) ◽  
pp. E278-E285 ◽  
Author(s):  
Marlou L. Dirks ◽  
Benjamin T. Wall ◽  
Irene Fleur Kramer ◽  
Antoine H. Zorenc ◽  
Joy P. B. Goessens ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Food Intake ◽  
Muscle Protein ◽  
Muscle Protein Synthesis ◽  
Neuromuscular Electrical Stimulation ◽  
Myofibrillar Protein ◽  
Single Session ◽  
Postprandial Period ◽  
Healthy Elderly ◽  
Protein Ingestion

The loss of muscle mass and strength that occurs with aging, termed sarcopenia, has been (at least partly) attributed to an impaired muscle protein synthetic response to food intake. Previously, we showed that neuromuscular electrical stimulation (NMES) can stimulate fasting muscle protein synthesis rates and prevent muscle atrophy during disuse. We hypothesized that NMES prior to protein ingestion would increase postprandial muscle protein accretion. Eighteen healthy elderly (69 ± 1 yr) males participated in this study. After a 70-min unilateral NMES protocol was performed, subjects ingested 20 g of intrinsically l-[1-13C]phenylalanine-labeled casein. Plasma samples and muscle biopsies were collected to assess postprandial mixed muscle and myofibrillar protein accretion as well as associated myocellular signaling during a 4-h postprandial period in both the control (CON) and stimulated (NMES) leg. Protein ingestion resulted in rapid increases in both plasma phenylalanine concentrations and l-[1-13C]phenylalanine enrichments, which remained elevated during the entire 4-h postprandial period ( P < 0.05). Mixed-muscle protein-bound l-[1-13C]phenylalanine enrichments increased significantly over time following protein ingestion, with no differences between the CON (0.0164 ± 0.0019 MPE) and NMES (0.0164 ± 0.0019 MPE) leg ( P > 0.05). In agreement, no differences were observed in the postprandial rise in myofibrillar protein bound l-[1-13C]phenylalanine enrichments between the CON and NMES legs (0.0115 ± 0.0014 vs. 0.0133 ± 0.0013 MPE, respectively, P > 0.05). Significant increases in mTOR and P70S6K phosphorylation status were observed in the NMES-stimulated leg only ( P < 0.05). We conclude that a single session of NMES prior to food intake does not augment postprandial muscle protein accretion in healthy older men.

scholarly journals Balance control enhancement using sub-sensory stimulation and visual-auditory biofeedback strategies for amputee subjects

2007 ◽  
Vol 31 (4) ◽  
pp. 342-352 ◽  
Author(s):  
Ming-Yih Lee ◽  
Chih-Feng Lin ◽  
Kok-Soon Soon
Keyword(s):  
Electrical Stimulation ◽  
Balance Control ◽  
Sensory Stimulation ◽  
Quiet Standing ◽  
Static Balance ◽  
Balance Performance ◽  
Foot Pressure ◽  
Gait Performance ◽  
Sound Side ◽  
Dynamic Gait

Sub-sensory electrical or mechanical stimulation can enhance the sensitivity of the human somatosensory system to improve the balance control capabilities of elderly. In addition, clinical studies suggest that visual-auditory biofeedback can improve sensory compensation for the elderly. This study hypothesizes that the static balance and gait performance of single leg quiet standing and treadmill walking could be improved for providing proprioceptive neuromuscular facilitation using sub-sensory stimulation and visual-auditory biofeedback in amputee subjects. To test this, a computerized foot pressure biofeedback sensory compensation system using sub-threshold low-level electrical stimulation combined with visual-auditory biofeedback was developed. Seven unilateral trans-tibial amputees who wore prostheses over 2 years were recruited. The subjects performed multiple single leg quiet standing trials with sub-sensory electrical stimulation applied at the quadriceps muscle during half of the trials. Static balance performance was characterized by using a Zebris motion analysis system to measure the sway distance and duration of the centre of mass on the second sacral (S2) of the subjects. In addition, multiple treadmill ambulatory trials with or without visual-auditory biofeedback was performed. Dynamic gait performance was characterized with a Zebris instrumented insole to measure the temporal responses of foot pressure sensors. Experimental results showed an improvement in three balance performance indices (Holding Time Index, HTI, Maximum Sway Distance Index, MSDI, and Average Sway Distance Index, ASDI) during single leg quiet standing by applying sub-sensory stimulation. The improvement ratio of these balance performance indices across subjects for single leg quiet standing tests resulted in 132.34% in HTI, 44.61% in MSDI, and 61.45% in ASDI. With visual-auditory biofeedback as a cue for heel contact and toe push-off condition during treadmill ambulation, the improvement of four dynamic gait performance measures (Double Support Period, DSP, Constant Time Cadence, CTC, Single Support Period, SSP, and Stance/Swing Ratio, SSR) in amputees was verified. This resulted in 7.89% in DSP (affected side), 5.09% in CTC, 16.67% in SSP (sound side), 45.30% in SSR (sound side), and 40.30% in SSR (affected side) respectively. These findings suggest that sub-threshold electrical stimulation and visual-auditory biofeedback rehabilitation strategies may be effective in compensating sensory loss and improving static balance and dynamic ambulation performance for amputees.

Effect of Electrical Stimulation on Lumbar Paraspinal Muscles

Spine ◽  
1993 ◽  
Vol 18 (13) ◽  
pp. 1787-1792 ◽  
Author(s):  
Mark T. McQuain ◽  
Mehrsheed Sinaki ◽  
Lee D. Shibley ◽  
Heinz W. Wahner ◽  
Duane M. IIstrup
Keyword(s):  
Electrical Stimulation ◽  
Paraspinal Muscles ◽  
Lumbar Paraspinal Muscles

scholarly journals Muscle Hypertrophy and Architectural Changes in Response to Eight-Week Neuromuscular Electrical Stimulation Training in Healthy Older People

Life ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 184
Author(s):  
Tereza Jandova ◽  
Marco Narici ◽  
Michal Steffl ◽  
Danilo Bondi ◽  
Moreno D’Amico ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
Vastus Lateralis ◽  
Neuromuscular Electrical Stimulation ◽  
Lower Limbs ◽  
Control Group ◽  
Older Individuals ◽  
Timed Up And Go ◽  
Cross Sectional ◽  
Age Related ◽  
Locomotor Ability

Loss of muscle mass of the lower limbs and of the spine extensors markedly impairs locomotor ability and spine stability in old age. In this study, we investigated whether 8 w of neuromuscular electrical stimulation (NMES) improves size and architecture of the lumbar multifidus (LM) and vastus lateralis (VL) along with locomotor ability in healthy older individuals. Eight volunteers (aged 65 ≥ years) performed NMES 3 times/week. Eight sex- and age-matched individuals served as controls. Functional tests (Timed Up and Go test (TUG) and Five Times Sit-to-Stand Test (FTSST)), VL muscle architecture (muscle thickness (MT), pennation angle (PA), and fiber length (FL)), along with VL cross-sectional area (CSA) and both sides of LM were measured before and after by ultrasound. By the end of the training period, MT and CSA of VL increased by 8.6% and 11.4%, respectively. No significant increases were observed in FL and PA. LM CSA increased by 5.6% (left) and 7.1% (right). Interestingly, all VL architectural parameters significantly decreased in the control group. The combined NMES had a large significant effect on TUG (r = 0.50, p = 0.046). These results extend previous findings on the hypertrophic effects of NMES training, suggesting to be a useful mean for combating age-related sarcopenia.

scholarly journals Neuromuscular electrical stimulation improves skeletal muscle regeneration through satellite cell fusion with myofibers in healthy elderly subjects

2017 ◽  
Vol 123 (3) ◽  
pp. 501-512 ◽  
Author(s):  
Ester Sara Di Filippo ◽  
Rosa Mancinelli ◽  
Mariangela Marrone ◽  
Christian Doria ◽  
Vittore Verratti ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Electrical Stimulation ◽  
Muscle Regeneration ◽  
Neuromuscular Electrical Stimulation ◽  
Skeletal Muscle Regeneration ◽  
Elderly Subjects ◽  
Superoxide Anion Production ◽  
Healthy Elderly ◽  
Myogenic Precursor ◽  
Healthy Elderly Subjects

The aim of this study was to determine whether neuromuscular electrical stimulation (NMES) affects skeletal muscle regeneration through a reduction of oxidative status in satellite cells of healthy elderly subjects. Satellite cells from the vastus lateralis skeletal muscle of 12 healthy elderly subjects before and after 8 wk of NMES were allowed to proliferate to provide myogenic populations of adult stem cells [myogenic precursor cells (MPCs)]. These MPCs were then investigated in terms of their proliferation, their basal cytoplasmic free Ca2+concentrations, and their expression of myogenic regulatory factors ( PAX3, PAX7, MYF5, MYOD, and MYOG) and micro-RNAs (miR-1, miR-133a/b, and miR-206). The oxidative status of these MPCs was evaluated through superoxide anion production and superoxide dismutase and glutathione peroxidase activities. On dissected single skeletal myofibers, the nuclei were counted to determine the myonuclear density, the fiber phenotype, cross-sectional area, and tension developed. The MPCs obtained after NMES showed increased proliferation rates along with increased cytoplasmic free Ca2+concentrations and gene expression of MYOD and MYOG on MPCs. Muscle-specific miR-1, miR-133a/b, and miR-206 were upregulated. This NMES significantly reduced superoxide anion production, along with a trend to reduction of superoxide dismutase activity. The NMES-dependent stimulation of muscle regeneration enhanced satellite cell fusion with mature skeletal fibers. NMES improved the regenerative capacity of skeletal muscle in elderly subjects. Accordingly, the skeletal muscle strength and mobility of NMES-stimulated elderly subjects significantly improved. NMES may thus be further considered for clinical or ageing populations.NEW & NOTEWORTHY The neuromuscular electrical stimulation (NMES) effect on skeletal muscle regeneration was assessed in healthy elderly subjects for the first time. NMES improved the regenerative capacity of skeletal muscle through increased myogenic precursor cell proliferation and fusion with mature myofibers. The increased cytoplasmic free Ca2+concentration along with MYOD, MYOG, and micro-RNA upregulation could be related to reduced O2·−production, which, in turn, favors myogenic regeneration. Accordingly, the skeletal muscle strength of NMES-stimulated lower limbs of healthy elderly subjects improved along with their mobility.

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