A submaximal test to assess back muscle capacity: Evaluation of construct validity

Larivière, Christian; Gravel, Denis; Gardiner, Phillip F.; Arsenault, André; Gagnon, Denis; Loisel, Patrick

doi:10.1016/j.jelekin.2008.11.009

Cited by 10 publications

(6 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Inability to maintain a given position likely indicates fatigue-related contraction failure, which suggests that back muscle fatigue occurred earlier and to a stronger extent in the younger and particularly male cLBP participants. Whereas such between-group differences might be assumed to confound a SEMG signal with a small signal to noise ratio (high noise), as this was the case in low force back extensions (Lariviere et al 2002a;Lariviere et al 2009), the signal to noise ratio was high in our back extensions that were close to a maximum. Consequently, it can be concluded that the differences in trunk inclination changes with the duration of the sustained contractions were unlikely confounded by noise, and thus the group comparisons of the SEMG fatigue changes can be relied upon.…”

Section: Methodological Considerationsmentioning

confidence: 93%

Age- and sex-specific effects in paravertebral surface electromyographic back extensor muscle fatigue in chronic low back pain

et al. 2019

View full text Add to dashboard Cite

The impact of aging on the back muscles is not well understood, yet may hold clues to both normal aging and chronic low back pain (cLBP). This study sought to investigate whether the median frequency (MF) surface electromyographic (SEMG) back muscle fatigue method-a proxy for glycolytic muscle metabolismwould be able to detect age-and sex-specific differences in neuromuscular and muscle metabolic functions in individuals with cLBP in a reliable way, and whether it would be as sensitive as when used on healthy individuals. With participants seated on a dynamometer (20°t runk anteflexion), paraspinal SEMG activity was recorded bilaterally from the multifidus (L5), longissimus (L2), and iliolumbalis (L1) muscles during isometric, sustained back extensions loaded at 80% of maximum from 117 younger (58 females) and 112 older (56 female) cLBP individuals. Tests were repeated after 1-2 days and 6 weeks. Median frequency, the SEMG variable indicating neuromuscular fatigue, was analyzed. Maximum back extensor strength was comparable between younger and older participants. Significantly less MF-SEMG back muscle fatigue was observed in older as compared to younger, and in older female as compared to older male cLBP individuals. Relative reliability was excellent, but absolute reliability appeared large for this SEMG-fatigue measure. Findings suggest that cLBP likely does not mask the age-specific diagnostic potential of the MF-SEMG back extensor fatigue method. Thus, this method possesses a great potential to be further developed into a valuable biomarker capable of detecting back muscle function at risk of sarcopenia at very early stages.

show abstract

Section: Methodological Considerationsmentioning

confidence: 93%

Age- and sex-specific effects in paravertebral surface electromyographic back extensor muscle fatigue in chronic low back pain

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Moreover, EMG values such as RMS and MdPF showed no influence of fatigue, for example increasing RMS or decreasing MdPF49, 50 ) . A previous study reported that healthy male subjects could repeat isometric trunk extension at 40%MVC of force more than 50 times, with 8-second cycles (1.5 seconds of progressive rise to reach the target force, 5 seconds to sustain this force level, and 1.5 seconds of rest)51 ) . In Experiment 1 of this study, subjects rested sufficiently between trials so they should not have been tired.…”

Section: Discussionmentioning

confidence: 99%

Properties of Force Output and Spectral EMG in Young Patients with Nonspecific Low Back Pain during Isometric Trunk Extension

Miura

Sakuraba

2014

J Phys Ther Sci

View full text Add to dashboard Cite

[Purpose] To clarify the influence of nonspecific low back pain (NSLBP) on force fluctuation and the myoelectric data of back muscles during isometric trunk extension at low to high force levels. [Subjects] Fourteen male subjects with NSLBP and 14 healthy male control subjects participated in this study. [Methods] All participants extended their trunk isometrically maintaining 10 levels of target force [2, 5, 10, 15, 20, 30, 50, 70, 80 and 90% of maximal voluntary contraction (MVC) in a random order] for about 4 seconds with visual feedback. A force transducer and tri-axis force sensor were positioned at the 7th thoracic vertebra to measure force output and the direction of force. Myoelectric activities of the back muscles (longissimus thoracis, L2 level; multifidus, S1 level) were recorded by surface electromyography. [Results] Force output of NSLBP subjects fluctuated more than that of healthy subjects at 30% and 50%MVC. Higher median power frequency in the multifidus was observed in NSLBP subjects at moderate to high force levels. [Conclusion] These results show that the properties of force output in NSLBP subjects differ from those in healthy subjects, suggesting that the assessment of force fluctuation of back muscles at moderate force levels is a useful index for evaluating and discriminating NSLBP.

show abstract

“…During these perturbation trials, subjects were asked to maintain constant extension torques, consistent with previous studies that have quantified the reflexive contribution to lumbar stability with the use of back muscle pre-tensioning (Hendershot et al, 2011;Moorhouse and Granata, 2007). Torque levels of 15 N m for males, and 10 N m for females were chosen as they are 5% of maximal levels (Larivière et al, 2002(Larivière et al, , 2014a(Larivière et al, , 2006(Larivière et al, , 2009. Subjects were aided with real-time feedback of their torque filtered at 15 Hz.…”

Section: Protocolsmentioning

confidence: 99%

Trunk muscle reflexes are elicited by small continuous perturbations in healthy subjects and patients with low-back pain

Ludvig

Larivière

2016

Journal of Electromyography and Kinesiology

Self Cite

View full text Add to dashboard Cite

A submaximal test to assess back muscle capacity: Evaluation of construct validity

Cited by 10 publications

References 36 publications

Age- and sex-specific effects in paravertebral surface electromyographic back extensor muscle fatigue in chronic low back pain

Age- and sex-specific effects in paravertebral surface electromyographic back extensor muscle fatigue in chronic low back pain

Properties of Force Output and Spectral EMG in Young Patients with Nonspecific Low Back Pain during Isometric Trunk Extension

Trunk muscle reflexes are elicited by small continuous perturbations in healthy subjects and patients with low-back pain

Contact Info

Product

Resources

About