Mechanomyographic and electromyographic muscle responses are related to power

Bodor, Marko

doi:10.1002/(sici)1097-4598(199905)22:5<649::aid-mus18>3.0.co;2-f

Cited by 15 publications

(48 citation statements)

References 4 publications

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“…Therefore, the results of the present study extended our previous findings to include the responses to static stretching and further supported Bodor's (1999) hypothesis in that MP as well as MMG remained unchanged while PT decreased as a result of static stretching. In addition, the velocity-related increases in MMG amplitude and MP from 60°AEs À1 to 240°AEs À1 were consistent with Bodor's (1999) hypothesis as well as our previous studies (Cramer et al 2000a(Cramer et al , 2002c.…”

Section: Discussionsupporting

confidence: 91%

“…Our previous studies have supported Bodor's (1999) hypothesis and indicated that the velocity-related patterns for MMG amplitude tracked MP, but were dissociated from PT, during maximal, concentric (Cramer et al 2000a(Cramer et al , 2002c and eccentric (Cramer et al 2002a, b) isokinetic muscle actions. Therefore, the results of the present study extended our previous findings to include the responses to static stretching and further supported Bodor's (1999) hypothesis in that MP as well as MMG remained unchanged while PT decreased as a result of static stretching. In addition, the velocity-related increases in MMG amplitude and MP from 60°AEs À1 to 240°AEs À1 were consistent with Bodor's (1999) hypothesis as well as our previous studies (Cramer et al 2000a(Cramer et al , 2002c.…”

Section: Discussionsupporting

confidence: 54%

“…It has been suggested that MMG amplitude is indirectly related to muscle stiffness (Barry and Cole 1988;Cramer et al 2000aCramer et al , b, 2002cEvetovich et al 1997Evetovich et al , 1998Orizio et al 1989), but directly related to muscle power output (Bodor 1999;Cramer et al 2000aCramer et al , b, 2002a. Barry and Cole (1988) and Orizio et al (1989) have suggested that a stiff muscle may attenuate the lateral oscillations of individual muscle fibers and, therefore, decrease the amplitude of the MMG signal.…”

Section: Discussionmentioning

confidence: 99%

“…Further studies are needed to examine the effects of static stretching on muscle stiffness and MMG amplitude to determine the mechanical factors involved in the stretching-induced decreases in muscle strength. Bodor (1999) hypothesized that MMG amplitude is more closely related to MP than PT during maximal, voluntary concentric isokinetic muscle actions. Our previous studies have supported Bodor's (1999) hypothesis and indicated that the velocity-related patterns for MMG amplitude tracked MP, but were dissociated from PT, during maximal, concentric (Cramer et al 2000a(Cramer et al , 2002c and eccentric (Cramer et al 2002a, b) isokinetic muscle actions.…”

Section: Discussionmentioning

confidence: 99%

“…Bodor (1999) hypothesized that MMG amplitude is more closely related to MP than PT during maximal, voluntary concentric isokinetic muscle actions. Our previous studies have supported Bodor's (1999) hypothesis and indicated that the velocity-related patterns for MMG amplitude tracked MP, but were dissociated from PT, during maximal, concentric (Cramer et al 2000a(Cramer et al , 2002c and eccentric (Cramer et al 2002a, b) isokinetic muscle actions. Therefore, the results of the present study extended our previous findings to include the responses to static stretching and further supported Bodor's (1999) hypothesis in that MP as well as MMG remained unchanged while PT decreased as a result of static stretching.…”

Section: Discussionmentioning

confidence: 99%

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The acute effects of static stretching on peak torque, mean power output, electromyography, and mechanomyography

et al. 2004

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The purpose of this study was to examine the acute effects of static stretching on peak torque (PT), the joint angle at PT, mean power output (MP), electromyographic (EMG) amplitude, and mechanomyographic (MMG) amplitude of the vastus lateralis (VL) and rectus femoris (RF) muscles during maximal, voluntary concentric isokinetic leg extensions at 60 and 240 degrees x s(-1) of the stretched and unstretched limbs. Twenty-one volunteers [mean age (SD) 21.5 (1.3) years] performed maximal, voluntary concentric isokinetic leg extensions for the dominant and non-dominant limbs at 60 and 240 degrees x s(-1). Surface EMG (muVrms) and MMG (mVrms) signals were recorded from the VL and RF muscles during the isokinetic tests. PT (Nm), the joint angle at PT, and MP (W) were calculated by a dynamometer. Following the initial isokinetic tests, the dominant leg extensors were stretched using four static stretching exercises. After the stretching, the isokinetic tests were repeated. PT decreased (P< or =0.05) from pre- to post-stretching for the stretched limb at 60 and 240 degrees x s(-1) and for the unstretched limb at 60 degrees x s(-1). EMG amplitude of the VL and RF also decreased (P< or =0.05) from pre- to post-stretching for the stretched and unstretched limbs. There were no stretching-induced changes (P>0.05) for the joint angle at PT, MP, or MMG amplitude. These findings indicated stretching-induced decreases in force production and muscle activation. The decreases in PT and EMG amplitude for the unstretched limb suggested that the stretching-induced decreases may be due to a central nervous system inhibitory mechanism.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 54%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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The acute effects of static stretching on peak torque, mean power output, electromyography, and mechanomyography

et al. 2004

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Mechanomyographic amplitude and mean power output during maximal, concentric, isokinetic muscle actions

et al. 2000

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The purpose of this study was to determine the velocity‐related patterns for mechanomyographic (MMG) amplitude, electromyographic (EMG) amplitude, mean power output (MP), and peak torque (PT) of the superficial muscles of the quadriceps femoris (vastus lateralis [VL], rectus femoris [RF], and vastus medialis [VM]) during maximal, concentric, isokinetic leg extensions. Twelve adult women (mean ± SD: 22 ± 3 years of age) performed such leg extensions at velocities of 60°, 120°, 180°, 240°, and 300°/s on a Cybex 6000 dynamometer. PT decreased (P < 0.05) across velocity to 240°/s. MP and MMG amplitude for each muscle (VL, RF, and VM) increased (P < 0.05) with velocity to 240°/s and then plateaued. EMG amplitude increased (P < 0.05) to 240°/s for the VL, remained unchanged across velocity (P > 0.05) for the RF, and increased (P < 0.05) to 300°/s for the VM. The results indicated close similarities between the velocity‐related patterns for MMG amplitude and MP, but dissociations among EMG amplitude, MMG amplitude, and PT. These findings support the recent hypothesis that MMG amplitude is more closely related to MP than PT during maximal, concentric, isokinetic muscle actions and, therefore, may be useful for monitoring training‐induced changes in muscle power. © 2000 John Wiley & Sons, Inc. Muscle Nerve 23: 1826–1831, 2000

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Neuromuscular and metabolic comparisons between ramp and step incremental cycle ergometer tests

et al. 2013

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Mechanomyographic and electromyographic muscle responses are related to power

Cited by 15 publications

References 4 publications

The acute effects of static stretching on peak torque, mean power output, electromyography, and mechanomyography

The acute effects of static stretching on peak torque, mean power output, electromyography, and mechanomyography

Mechanomyographic amplitude and mean power output during maximal, concentric, isokinetic muscle actions

Neuromuscular and metabolic comparisons between ramp and step incremental cycle ergometer tests

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