Effects of training intensity in electromyostimulation on human skeletal muscle

Natsume, Toshiharu; Ozaki, Hayao; Kakigi, Ryo; Kobayashi, Hiroyuki; Naito, Hisashi

doi:10.1007/s00421-018-3866-3

Cited by 24 publications

(24 citation statements)

References 32 publications

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“…[ 16 ] As a result of NMES, a number of adaptation processes occur in skeletal muscles, [ 17 ] and in the function of the nervous system. [ 18 ] To maximize the effect of NMES, sufficiently intense exposure regimes [ 19 ] and/or a long course of stimulation (at least 4 weeks for athletes) are required. Based on this, a 5-day NMES course with a fairly moderate degree of exposure, as was the case in the above studies in patients after cardiovascular surgery, is quite likely to have a limited effect.…”

Section: Discussionmentioning

confidence: 99%

“…It was previously shown that the intensity of NMES in healthy has a positive correlation with muscle CSA. [ 19 ] Also NEMS in healthy people, with a course duration of up to 4 weeks, leads to an increase in the strength of stimulated muscles without their hypertrophy. [ 22 ] The NMES intensity in patients after cardiac surgery was significantly lower, [ 8 , 9 ] and the course duration was shorter, which explains our results.…”

Section: Discussionmentioning

confidence: 99%

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Neuromuscular electrical stimulation in early rehabilitation of patients with postoperative complications after cardiovascular surgery

Сумин¹,

Олейник²,

Безденежных³

et al. 2020

Medicine

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Background: To evaluate the effectiveness of neuromuscular electrical stimulation (NMES) in early rehabilitation of patients with postoperative complications after cardiovascular surgery. Methods: 37 patients (25 men and 12 women) aged 45 to 70 years with postoperative complications after cardiovascular surgery were included in the study. Eighteen patients underwent NMES daily since postoperative day 3 until discharge in addition to standard rehabilitation program (NMES group), and 19 patients underwent standard rehabilitation program only (non-NMES group). The primary outcome was the knee extensors strength at discharge in NMES group and in control. Secondary outcomes were the handgrip strength, knee flexor strength, and cross-sectional area (CSA) of the quadriceps femoris in groups at discharge. Results: Baseline characteristics were not different between the groups. Knee extensors strength at discharge was significantly higher in the NMES group (28.1 [23.8; 36.2] kg on the right and 27.45 [22.3; 33.1] kg on the left) than in the non-NMES group (22.3 [20.1; 27.1] and 22.5 [20.1; 25.9] kg, respectively; P < .001). Handgrip strength, knee flexor strength, quadriceps CSA, and 6 minute walk distance at discharge in the groups had no significant difference. Conclusions: This pilot study shows a beneficial effect of NMES on muscle strength in patients with complications after cardiovascular surgery. The use of NMES showed no effect on strength of non-stimulated muscle, quadriceps CSA, and distance of 6-minute walk test at discharge. Further blind randomized controlled trials should be performed with emphasis on the effectiveness of NEMS in increasing muscle strength and structure in these patients.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Neuromuscular electrical stimulation in early rehabilitation of patients with postoperative complications after cardiovascular surgery

Сумин¹,

Олейник²,

Безденежных³

et al. 2020

Medicine

View full text Add to dashboard Cite

show abstract

“…Although several factors could explain this, such as the method of strength measurement, the current intensity, the physical activity level of the participants and the stimulation duration, we believe that the most important factor might be the current intensity. The evidence suggests that the intensity should be at a maximum tolerable level to maintain the MVC level for strengthening effect . However, we increased the current intensity relatively minimally until visible contraction of the muscle fibers to avoid muscle damage as a result of sarcopenia.…”

Section: Discussionmentioning

confidence: 99%

“…The evidence suggests that the intensity should be at a maximum tolerable level to maintain the MVC level for strengthening effect. 9,16,23 However, we increased the current intensity relatively minimally until visible contraction of the muscle fibers to avoid muscle damage as a result of sarcopenia. Therefore, our MVC level might not have reached the desired level for isometric strengthening.…”

Section: Discussionmentioning

confidence: 99%

Effects of neuromuscular electrical stimulation of quadriceps on the quadriceps strength and functional performance in nursing home residents: A comparison of short and long stimulation periods

Candan

Akoğlu

Büğüşan

et al. 2019

Geriatrics Gerontology Int

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Aim To determine the effect of two neuromuscular electrical stimulation (NMES) periods on quadriceps strength (QS) and functional performance in nursing home residents. Methods A total of 53 older adults living in a nursing home were randomized into two groups: NMES with a short stimulation period and NMES with a long stimulation period. The quadriceps muscles were bilaterally stimulated three times a week for 6 weeks in both groups. Strength was measured with a digital handheld dynamometer and 30‐s chair stand test. Functional performance was evaluated with the Berg balance scale, Timed Up and Go test and 6‐min walking test. Results Analysis was carried out on 44 older adults, who completed the study protocol. The isometric QS did not change within groups or between groups. Interestingly, the 30‐s chair stand test score increased for both groups, but the improvements were similar among groups. The Berg balance scale score, Timed Up and Go test time and 6‐min walking test distance also improved in both groups. However, no difference in any of the functional outcome measures was observed between groups. Conclusions The present findings showed that both NMES protocols might be an alternative to achieve an improvement in functional strength of the lower extremities and functional performance in nursing home residents, whereas neither of the two protocols seems effective for improving isometric QS. Both methods might contribute to maintaining isometric QS during the aging process. Geriatr Gerontol Int 2019; 19: 409–413.

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“…One of these reasons is; in our study, the training program was scheduled over a period of 6 weeks and with a total of 12 sessions, which may have been not enough to provide muscle strength gain. Because, it is suggested that more than six weeks of exercise training is needed to increase muscle strength (Natsume et al, 2018). Another reason can be due to the electrical stimulation of the skeletal muscle causing a series of events leading to rapid twitch type 2b fibers; a conversion, which gives slow-twitch type 1 fiber properties (Ward, 2009;Ward and Shkuratova, 2002).…”

Section: Discussionmentioning

confidence: 99%

Russian current versus high voltage current with isokinetic training on the quadriceps muscle strength and endurance

Akınoğlu¹,

Kocahan²

2020

J Exerc Rehabil

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Electrotherapy modalities are one of the increasing ways of muscle strength and endurance. However, it is not clear which electrotherapy modalities are more effective. The purpose of this study is to compare the effect of Russian current (RC) and high voltage pulsed current (HVPC) on the strength and endurance of the quadriceps muscle. The study was performed on 10 volleyball athletes. The participants' extremities were divided into two groups as RC and HVPC. Muscle strength and endurance levels were assessed by an isokinetic device. Isokinetic training and 20-min electrotherapy were given in each treatment session. This training program consisted of a total of 12 sessions, scheduled twice a week for 6 weeks. After training, knee extensor peak torque values and endurance ratios have increased in both groups, but it was determined that this increase was only significant in terms of the endurance ratio (P< 0.05). There was no significant difference between the muscle strength and the endurance ratio of the RC and HVPC groups (P> 0.05). RC or HVPC have no advantages over each other, and therefore it has been determined that both currents can be used in order to strengthen muscles and increase muscular endurance. Additional studies whose longer-term effects will investigate are needed.

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Effects of training intensity in electromyostimulation on human skeletal muscle

Abstract: Low-intensity NMES could increase MT, muscle fiber CSA, and muscle strength in healthy human skeletal muscles. However, the magnitude of increase is lower in low-intensity than in high-intensity NMES training.

Cited by 24 publications

References 32 publications

Neuromuscular electrical stimulation in early rehabilitation of patients with postoperative complications after cardiovascular surgery

Neuromuscular electrical stimulation in early rehabilitation of patients with postoperative complications after cardiovascular surgery

Effects of neuromuscular electrical stimulation of quadriceps on the quadriceps strength and functional performance in nursing home residents: A comparison of short and long stimulation periods

Russian current versus high voltage current with isokinetic training on the quadriceps muscle strength and endurance

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