Inter-individual variability in the patterns of responses for electromyography and mechanomyography during cycle ergometry using an RPE-clamp model

Cochrane-Snyman, Kristen C.; Housh, Terry J.; Smith, Cory M.; Hill, Ethan C.; Jenkins, Nathaniel D.M.; Schmidt, Richard J.; Johnson, Glen O.

doi:10.1007/s00421-016-3394-y

Cited by 12 publications

(25 citation statements)

References 32 publications

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“…Similar evidence for unique sensory tolerance between individuals was demonstrated by Cochrane‐Snyman et al. (), who observed large degrees of inter‐individual variability for the patterns of MMG response when subjects performed cycling exercise at a constant level of perceived exertion. In this context, it is interesting to consider the individualistic rate of change in force twitch kinetics together with the stimulation of group III/IV muscle afferents in regards to failure times during fatiguing exercise.…”

Section: Discussionsupporting

confidence: 77%

“…; Cochrane‐Snyman et al. ; Cè et al. ) have suggested that the MMG response during fatiguing exercise may support the muscle wisdom hypothesis (Marsden et al.…”

Section: Discussionmentioning

confidence: 93%

“…; Cochrane‐Snyman et al. ). These observations provide support for the notions that fatigue‐based changes in motor unit activity are reflected in the MMG response, are highly variable between individuals, and contribute to task failure.…”

Section: Discussionmentioning

confidence: 99%

“…; Madeleine and Farina ; Cochrane‐Snyman et al. ) to examine individual fatigue‐based motor control adaptations in relation to failure times in order to form generalizable conclusions about rate‐limiting processes while still allowing for interindividual differences to be considered.…”

Section: Introductionmentioning

confidence: 99%

“…Interestingly, it has been observed (Booghs et al 2012) that motor control adjustments, not muscle oxygenation levels, are associated with failure times during sustained high-intensity isometric force tasks. Investigations are therefore warranted (Zwarts and Keidel 1991;Ryan et al 2007;Madeleine and Farina 2008;Cochrane-Snyman et al 2016) to examine individual fatigue-based motor control adaptations in relation to failure times in order to form generalizable conclusions about rate-limiting processes while still allowing for interindividual differences to be considered.…”

Section: Introductionmentioning

confidence: 99%

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Mechanomyographic responses for the biceps brachii are associated with failure times during isometric force tasks

Carr

Beck

et al. 2018

Physiol Rep

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In order to characterize the physiological adjustments within the neuromuscular system that contribute to task failure, this study examined the surface mechanomyographic (MMG) response during maximal and submaximal isometric force tasks of the elbow flexors sustained to failure. The time and frequency components of the MMG signal have shown to be influenced by motor unit activation patterns as well as tetanus. Therefore, it was hypothesized that the rate of change for the MMG response would associate with failure times and would be reduced to a similar degree between the two tasks. The isometric force tasks were performed by the dominant elbow flexors of twenty healthy males (age: 25 ± 4 years) and MMG was collected from the biceps brachii. Regression analyses were used to model the relationships between the rates of change for MMG versus failure times. There were high levels of interindividual variability in the response patterns, yet the models demonstrated significant negative associations between the rate of change for the MMG responses and failure times during both tasks (R 2 = 0.41–0.72, P < 0.05). Similarly, the mean MMG amplitude and frequency values were reduced to comparable levels at the failure point of the two tasks. The results of this study demonstrated that force failure is associated with the rate of diminution in the properties of the muscle force twitch.

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Section: Discussionsupporting

confidence: 77%

“…; Cochrane‐Snyman et al. ; Cè et al. ) have suggested that the MMG response during fatiguing exercise may support the muscle wisdom hypothesis (Marsden et al.…”

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Mechanomyographic responses for the biceps brachii are associated with failure times during isometric force tasks

Carr

Beck

et al. 2018

Physiol Rep

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Neuromuscular responses of recreationally active women during a sustained, submaximal isometric leg extension muscle action at a constant perception of effort

et al. 2018

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Test–retest reliability of a 30-min fixed perceived effort cycling exercise

2022

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Purpose Using exercise protocols at a fixed rating of perceived effort (RPE) is a useful method for exploring the psychophysical influences on exercise performance. However, studies that have employed this protocol have arbitrarily selected RPE values without considering how these values correspond to exercise intensity thresholds and domains. Therefore, aligning RPE intensities with established physiological thresholds seems more appropriate, although the reliability of this method has not been assessed. Methods Eight recreationally active cyclists completed two identical ramped incremental trials on a cycle ergometer to identify gas exchange threshold (GET). A linear regression model plotted RPE responses during this test alongside gas parameters to establish an RPE corresponding to GET (RPEGET) and 15% above GET (RPE+15%GET). Participants then completed three trials at each intensity, in which performance, physiological, and psychological measures were averaged into 5-min time zone (TZ) intervals and 30-min ‘overall’ averages. Data were assessed for reliability using intraclass correlation coefficients (ICC) and accompanying standard error measurements (SEM), 95% confidence intervals, and coefficient of variations (CoV). Results All performance and gas parameters showed excellent levels of test–retest reliability (ICCs = > .900) across both intensities. Performance, gas-related measures, and heart rate averaged over the entire 30-min exercise demonstrated good intra-individual reliability (CoV = < 5%). Conclusion Recreationally active cyclists can reliably replicate fixed perceived effort exercise across multiple visits when RPE is aligned to physiological thresholds. Some evidence suggests that exercise at RPE+15%GET is more reliable than RPEGET.

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Inter-individual variability in the patterns of responses for electromyography and mechanomyography during cycle ergometry using an RPE-clamp model

Cited by 12 publications

References 32 publications

Mechanomyographic responses for the biceps brachii are associated with failure times during isometric force tasks

Mechanomyographic responses for the biceps brachii are associated with failure times during isometric force tasks

Neuromuscular responses of recreationally active women during a sustained, submaximal isometric leg extension muscle action at a constant perception of effort

Test–retest reliability of a 30-min fixed perceived effort cycling exercise

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