Evidence of altered corticomotor excitability following targeted activation of gluteus maximus training in healthy individuals

Fisher, Beth E.; Southam, Anna C.; Kuo, Yi-Ling; Lee, Ya-Yun; Powers, Christopher M.

doi:10.1097/wnr.0000000000000556

Cited by 21 publications

(16 citation statements)

References 24 publications

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“…That is, a stronger response is evoked by a given neural signal. 32 Our results are therefore consistent with the suggestion that the gluteal activation warm-up increased the corticomotor excitability of the glutes acutely. Such a phenomenon would offer an exciting validation of the use of therapeutic exercises to prime performance.…”

Section: Discussionsupporting

confidence: 92%

Effect of a gluteal activation warm-up on explosive exercise performance

Parr

Price

Cleather

2017

BMJ Open Sport Exerc Med

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ObjectivesTo evaluate the effect of a gluteal activation warm-up on the performance of an explosive exercise (the high hang pull (HHP)).MethodsSeventeen professional rugby union players performed one set of three HHPs (with 80% of their one repetition maximum load) following both a control and activation warm-up. Peak electrical activity of the gluteus maximus and medius was quantified using electromyography (EMG). In addition, the kinematics and kinetics of nine players was also recorded using force plate and motion capture technology. These data were analysed using a previously described musculoskeletal model of the right lower limb in order to provide estimates of the muscular force expressed during the movement.ResultsThe mean peak EMG activity of the gluteus maximus was significantly lower following the activation warm-up as compared with the control (p<0.05, effect size d=0.30). There were no significant differences in the mean peak estimated forces in gluteus maximus and medius, the quadriceps or hamstrings (p=0.053), although there was a trend towards increased force in gluteus maximus and hamstrings following the activation warm-up. There were no differences between the ground reaction forces following the two warm-ups.ConclusionThis study suggests that a gluteal activation warm-up may facilitate recruitment of the gluteal musculature by potentiating the glutes in such a way that a smaller neural drive evokes the same or greater force production during movement. This could in turn potentially improve movement quality.

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Section: Discussionsupporting

confidence: 92%

Effect of a gluteal activation warm-up on explosive exercise performance

Parr

Price

Cleather

2017

BMJ Open Sport Exerc Med

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“…The specific details of included studies, incorporating the Downs and Black quality assessment and NHMRC assessment of evidence for each study, are provided in Table . All but one study, which did not have a parallel control group (Fisher et al ., ), were comparative studies having a concurrent control condition (NHMRC study evidence guidelines Grade III‐1 or III‐2, Table ).…”

Section: Resultsmentioning

confidence: 99%

Corticospinal responses following strength training: a systematic review and meta‐analysis

Kidgell

Bonanno

Frazer

et al. 2017

Eur J of Neuroscience

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Strength training results in changes in skeletal muscle; however, changes in the central nervous system also occur. Over the last 15 years, non-invasive brain stimulation techniques, such as transcranial magnetic stimulation, have been used to study the neural adaptations to strength training. This review explored the hypothesis that the neural adaptations to strength training may be due to changes in corticospinal excitability and inhibition and, such changes, contribute to the gain in strength following strength training. A systematic review, according to PRISMA guidelines, identified studies by database searching, hand-searching and citation tracking between January 1990 and the first week of February 2017. Methodological quality of included studies was determined using the Downs and Black quality index. Data were synthesised and interpreted from meta-analysis. Nineteen studies investigating the corticospinal responses following strength training were included. Meta-analysis found that strength training increased strength [standardised mean difference (SMD) 0.84, 95% CI 0.55 to 1.13], decreased short-interval intracortical inhibition (SMD -1.00, 95% CI -1.84 to -0.17) and decreased the cortical silent period (SMD -0.66, 95% CI -1.00 to -0.32). Strength training had no effect on motor threshold (SMD -0.12, 95% CI -0.49 to 0.25), but a borderline effect for increased corticospinal excitability (SMD 0.27, 95% CI 0.00 to 0.54). In untrained healthy participants, the corticospinal response to strength training is characterised by reduced intracortical inhibition and cortical silent period duration, rather than changes in corticospinal excitability. These data demonstrate that strength training targets intracortical inhibitory networks within the primary motor cortex (M1) and corticospinal pathway, characterising an important neural adaptation to strength training.

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“… 4 Central factors include, but are not limited to, corticomotor (Fisher et al, 2016 ) and motoneuron (Heckman et al, 2009 ) excitability. …”

mentioning

confidence: 99%

Interpreting Signal Amplitudes in Surface Electromyography Studies in Sport and Rehabilitation Sciences

Vigotsky

Halperin²,

Lehman³

et al. 2018

Front. Physiol.

335

253

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Surface electromyography (sEMG) is a popular research tool in sport and rehabilitation sciences. Common study designs include the comparison of sEMG amplitudes collected from different muscles as participants perform various exercises and techniques under different loads. Based on such comparisons, researchers attempt to draw conclusions concerning the neuro- and electrophysiological underpinning of force production and hypothesize about possible longitudinal adaptations, such as strength and hypertrophy. However, such conclusions are frequently unsubstantiated and unwarranted. Hence, the goal of this review is to discuss what can and cannot be inferred from comparative research designs as it pertains to both the acute and longitudinal outcomes. General methodological recommendations are made, gaps in the literature are identified, and lines for future research to help improve the applicability of sEMG are suggested.

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Evidence of altered corticomotor excitability following targeted activation of gluteus maximus training in healthy individuals

Cited by 21 publications

References 24 publications

Effect of a gluteal activation warm-up on explosive exercise performance

Effect of a gluteal activation warm-up on explosive exercise performance

Corticospinal responses following strength training: a systematic review and meta‐analysis

Interpreting Signal Amplitudes in Surface Electromyography Studies in Sport and Rehabilitation Sciences

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