Electromyographic and mechanomyographic responses across repeated maximal isometric and concentric muscle actions of the leg extensors

Camic, Clayton L.; Housh, Terry J.; Zúñiga, Jorge M.; Hendrix, C. Russell; Bergstrom, Haley C.; Traylor, Daniel A.; Schmidt, Richard J.; Johnson, Glen O.

doi:10.1016/j.jelekin.2012.09.010

Cited by 32 publications

(41 citation statements)

References 29 publications

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“…This may be due, in part, to post-activation potentiation, which is plausible because potentiation is maximized when the conditioning muscle activation is greatest [28] and warm-up contractions are submaximal. A second influence may have been a progressive increase in muscle activation through the beginning of the test, which has been shown in previous studies [1,4,18,29]. Another contributing factor may be due to the non-reciprocal nature of the first repetition of the test, which has been previously documented as having a much shorter load range window [16], in accordance with the current results (Fig.…”

Section: Discussionsupporting

confidence: 91%

Methodological Differences in the Interpretation of Fatigue Data from Repeated Maximal Effort Knee Extensions

Ciccone¹,

Deckert²,

Herda³

et al. 2017

TOSSJ

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Section: Discussionsupporting

confidence: 91%

Methodological Differences in the Interpretation of Fatigue Data from Repeated Maximal Effort Knee Extensions

Ciccone¹,

Deckert²,

Herda³

et al. 2017

TOSSJ

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“…Table 4 presents the analysed articles concerning the MMG signal during dynamic contractions. Ten over twenty studies used an ACC to detect MMG signal [46,[69][70][71][72][73][74][75][76][77], nine used a PIZ [78][79][80][81][82][83][84][85], and one used an MIC [86]. Ten articles focused on the quadriceps muscle, seven investigated the biceps brachii muscle, two were centred on the triceps brachii muscle, while pectoralis major, first digital interosseum and forearm flexors muscles were analysed in just one study.…”

Section: Mmg During Isometric Contraction In Isolated Musclementioning

confidence: 99%

“…The investigations mainly focused on the relationship between MMG signal and force output during concentric isotonic [48,69,74,76] and isokinetic contraction [78,[81][82][83], as well as eccentric isokinetic contraction [76,80,84,85]. Altogether, authors observed that MMG amplitude increases linearly in both isotonic and isokinetic contraction until a certain muscle-dependent threshold that could be identified to be about the 80 % 1-RM and 240°/s for isotonic and isokinetic contraction, respectively.…”

Section: Mmg During Dynamic Contractionmentioning

confidence: 99%

“…Recently, MMG signal was also acquired during incremental aerobic exercise, with the aim to correlate MMG variables with some cardiopulmonary and metabolic parameters related to the anaerobic threshold [70,75]. Whereas correlations between MMG signal amplitude and frequency content and the level of force output were reported under both isometric [24,[49][50][51][52][53]64] and dynamic contractions [48,69,74,76], the use of MMG signal to evaluate muscle activation during aerobic tasks has been less investigated [70,75].…”

Section: Reliability Of Mmg Signalmentioning

confidence: 99%

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Novel insights into skeletal muscle function by mechanomyography: from the laboratory to the field

2015

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Purpose The review aimed to provide a wider overview on the new application fields of MMG signal. A particular emphasis on measurements reliability and sensitivity was also given. Methods Five electronic databases were searched for eligible studies published between 2000 and 2014. Two authors assessed selected articles. Several domains (sensor types, participants' characteristics, experimental protocols, investigated muscle/s, measured parameters, and main results) were extracted for analysis. From a total of 1326 citations, 170 were selected for evaluation and 111 studies were identified. Results From the analysis of the literature it resulted that MMG signal (a) has a high level of reliability, especially for the parameters calculated during isometric contractions; (b) can be used to examine muscle mechanical activation and motor unit recruitment strategies under several types of exercise paradigms; (c) is influenced by the mechanical characteristics of cross-bridges and series elastic components, and may provide deeper insights into their behaviour under several physiological models; (d) could be a useful biomarker for triggering orthosis or multifunction access devices, and for the evaluation of patients presenting alterations in muscle function. Conclusions The MMG approach has been proficiently applied in several fields ascribable to both exercise physiology and clinical settings. This approach can provide deeper insights into muscle mechanical behaviour under several physiological models and for the evaluation of patients with altered muscle function.

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“…Recently, surface electromyography (EMG) has been widely applied to investigate and evaluate muscle activity/adaptation (Beck et al, 2012; Camic et al, 2013; Gabriel et al, 2007; Rocha-Júnior et al, 2015). The time domains of the EMG signal reflect the changes in electrical activity and motor unit recruitment during muscle contraction, which are generally regarded to be sensitive for investigating the changes in motor control patterns in movement tasks and interface/shoe configurations (Basmajian and DeLuca, 1985).…”

Section: Introductionmentioning

confidence: 99%

Changes in Impact Signals and Muscle Activity in Response to Different Shoe and Landing Conditions

Wang

Zhang

2017

Journal of Human Kinetics

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Few rigorous scientific studies have investigated how the corresponding neuromuscular activity in the lower extremity occurs during different landing control movements in response to different impact signals. This study aimed to determine the potential shoe effects on impact signals, neuromuscular responses and their possible interactions in different human landing movements. Twelve male basketball players were required to wear high-cushioned basketball shoes (BS) and minimally cushioned control shoes (CC) to perform active drop jump landings (DJL) and passive landings (PL). Ground reaction forces and EMG amplitude (root mean square, EMGRMS) of the leg muscles within 50 ms before and after the landing movements were collected simultaneously. No shoe effect was found on the characteristics of impact signals and neuromuscular activity during the contact phase of DJL. By contrast, for PL, the values of maximal ground reaction force and the peak loading rate were evidently lower in the BS condition than in the CC condition (p < 0.05). Meanwhile, the EMGRMS of all muscles demonstrated a significant decrease in the BS condition compared with the CC condition within 50 ms after contact (p < 0.05). These findings suggest that under the condition in which related muscles are activated improperly, a neuromuscular adaptation occurs in response to different impact signals. Key words: vertical ground reaction force; EMG amplitude; drop landing. IntroductionDuring two-footed landings from vertical jumps, the peak magnitude of vertical reaction forces has been found to range from 3.5 to 6 times BW (Gross and Nelson, 1988). Previous investigations reported a close relationship between the great shock in strenuous landings and lower-limb injuries, that is, repetitive excessive loading can induce acute injuries (Beynnon et al., 2005;McNitt-Gray, 1993) and overuse damages (Agel et al., 2007;Borowski et al., 2008). Thus, to prevent sports injuries in athletic activities, footwear manufacturers have been focusing on designing shoes that can attenuate a shock wave, and thus the concept of cushioning has been widely used since the 1970s (Clarke et al., 1983).Current investigations into impact forces have focused not only on the magnitude, timing and the loading rate, but also on the reactions and muscular responses of the musculoskeletal system (Brüggemann et al., 2011). A series of concepts about the effects of impacts has been provided during the past ten years (Boyer and Nigg, 2007;Nigg and Wakeling, 2001). Impacts are regarded as input signals into the human locomotor system, which produce a shock wave and meantime initiate the vibrations of lower extremity soft tissues. These signals are sensed and the central nervous system responds by adjusting, if necessary, the activation of the relevant major muscle groups (Nigg and Wakeling, 2001 (Frederick and Hagy, 1986;Hamill et al., 1983), different lower limb postures (Derrick et al., 2002), and/or the hardness (or material) of the shoe midsole (Clarke et al., 1983). Theoretically, dif...

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Electromyographic and mechanomyographic responses across repeated maximal isometric and concentric muscle actions of the leg extensors

Cited by 32 publications

References 29 publications

Methodological Differences in the Interpretation of Fatigue Data from Repeated Maximal Effort Knee Extensions

Methodological Differences in the Interpretation of Fatigue Data from Repeated Maximal Effort Knee Extensions

Novel insights into skeletal muscle function by mechanomyography: from the laboratory to the field

Changes in Impact Signals and Muscle Activity in Response to Different Shoe and Landing Conditions

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