Reliability of knee joint muscle activity during weight bearing force control

Smith, Andrew; Flaxman, Teresa E.; Speirs, Andrew; Benoît, Daniel

doi:10.1016/j.jelekin.2012.03.010

Cited by 16 publications

(19 citation statements)

References 52 publications

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“…ICC has been chosen as a measure of relative reliability because it considers between and within-subject variance (Larsson et al, 2003;Mathur et al, 2005;Wier, 2005). ICC values of more than 0.75 represent high reliability, values of 0.60-0.74 represents medium reliability, and low or lack of the reliability would be for all values below 0.60 (Smith et al, 2012). For acceptable reliability level, the value of 0.75 was taken as per previous study (Dankaerts et al, 2004).…”

Section: Discussionmentioning

confidence: 99%

“…Practically, it is possible for ratios to range from negative to positive infinity. In that case, the alternative measure of reliability -standard error of measurement (SEM) was used to express the absolute reliability of the measure (Smith et al, 2012). Since there were two testing sessions and three trails for each knee angle, additionally paired-sample T-test was used to determine if differences in normalized EMG magnitudes occurred between testing sessions (Smith et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…Similarly, Rainoldi et al (2001) showed a high level of reliability (ICC>70%) for 50 seconds sustained contraction at 50% MVC. In the weight-bearing control study, Smith et al (2012) reported high inter-session reliability of the quadriceps muscles in most of the tested conditions, ICC=0.60-0.94. In the same study authors found similar results for the intra-session reliability because ICC was from 0.63-0.95.…”

Section: Introductionmentioning

confidence: 92%

“…When it comes to intra-session reliability, many studies showed moderate to high level of reliability, depending on the task used (Larsson et al, 1999;Fauth et al, 2010, Smoliga et al, 2010Smith;2012;Worrel et al, 1998). Larsson et al (1999) aimed to investigate the during-the-day reproducibility by using the protocol that involves 10 maximal dynamic extensions with a one-hour rest.…”

Section: Introductionmentioning

confidence: 99%

“…Both studies reported good EMG reliability for the intra-session repetitions, but one study reported poor to moderate reliability EMG for inter-session (Worrel et al, 1998) while another study reported moderate to high reliability of the EMG for inter-session design (Smith et al, 2012). It seems that there is a certain amount of the studies that explained reliability of the EMG in various study designs with different tasks.…”

Section: Introductionmentioning

confidence: 99%

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Intra-session and inter-session reliability of electromyography in leg extension during maximum voluntary isometric contractions of quadriceps: The effect of knee angle

Kukić¹,

Stanković²,

Mrdaković³

et al. 2017

Fizicka kultura

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Numerous factors can influence the reliability of the signal obtained by electromyography EMG among which the type of contraction is practically fundamental. This study aimed to investigate intra-and inter-session reliability of EMG for maximal voluntary isometric contraction (MVIC) of the knee extensors at different joint angles. Nine healthy male students from the Faculty of Sport and Physical Education voluntarily joined the experiment. Main characteristics of the subjects were: age 23±1 years, body weight 80.8±7.8 kg and body height 182±7 cm. EMG signal from three surface heads of quadriceps femoris was recorded -vastus lateralis (VL), vastus medialis (VM), and rectus femoris (RF). Subjects had to perform 3 MVIC as fast as possible, as strong as possible at 6 different knee joint angles on 2 occasions separated by 7-8 days. The intra-class coefficient of correlation (ICC) was used to identify relative intra-and inter-session reliability, while standard error of measurement (SEM) was used to calculate the absolute reliability of each tested muscle. All muscles showed high intra-session reliability (ICC=0.488-0.988 and SEM=1.38-11.35). VL showed good inter-session reliability for most of the conditions (ICC=0.603-0.948), VM for two knee angles (ICC120°=0.764 and ICC130°=0.788), RF was not reliable for any knee angle. This study indicates that RF does not need to be used in EMG testing in leg extension MVIC due to lack of reliability between two sessions, and If EMG RMS from VL and VM will be tested, knee angle of 120° should be used for the testing.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Intra-session and inter-session reliability of electromyography in leg extension during maximum voluntary isometric contractions of quadriceps: The effect of knee angle

Kukić¹,

Stanković²,

Mrdaković³

et al. 2017

Fizicka kultura

View full text Add to dashboard Cite

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Sex‐related differences in neuromuscular control: Implications for injury mechanisms or healthy stabilisation strategies?

Flaxman

Smith

Benoît

2013

Journal Orthopaedic Research

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Sex-related differences in neuromuscular activation have been previously identified and are thought to be an underlying contributor to the ACL injury mechanism. During dynamic tasks evaluating the role of muscle action as it relates to joint stability is difficult since individual muscle contributions to force generation are confounded by biomechanical factors of movement. The purpose of this study was to examine sex-related differences in knee muscle action during a weight-bearing isometric exercise and identify the stabilising role of these muscles. Healthy young adults stood with their dominant leg in a boot fixed to a force platform. A force matching protocol required participants to modulate normalised ground reaction forces in various combinations of anterior-posterior, medial-lateral loads while maintaining a constant joint position. Normalised electromyographic data of eight muscles crossing the knee joint were displayed in polar plots. Patterns were quantified with an orientation analysis and mean activation magnitudes were computed. Females demonstrated symmetrical activation patterns with significantly greater activation in the rectus femoris (p ¼ 0.037), lateral gastrocnemius (p ¼ 0.012), and tensor fascia lata (p ¼ 0.005) compared to males. High between-subject reliability (ICC ¼ 0.772-0.977) was observed across groups suggesting we have identified fundamental sex-related differences in knee joint stabilisation strategies. ß

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Differences in EMG–moment relationships between ACL‐injured and uninjured adults during a weight‐bearing multidirectional force control task

Flaxman

Alkjær

Smale

et al. 2018

Journal Orthopaedic Research

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Anterior cruciate ligament injury (ACLi) reduces mechanical knee joint stability. Differences in muscle activation patterns are commonly identified between ACLi individuals and uninjured controls (CON); however, how and which of these differences are adaptations to protect the knee or adversely increase risk of joint instability remain unclear. Since the neuromuscular system integrates activity of all muscles crossing the knee to create a moment‐of‐force that opposes an external load, this study sought to quantify differences in individual muscle electromyography (EMG)–moment relationships between ACLi and CON. Participants isometrically modulated ground reaction forces during a standing force matching protocol to elicit combinations of sagittal, frontal and transverse plane moments. Partial least squares regressions determined which internal joint moment(s) predicted activation of 10 leg muscles for each group. Compared to CON, ACLi demonstrated greater contribution of rectus femoris to knee extension, semitendinosus and gastrocnemii to knee flexion, and lateral gastrocnemii to knee external rotation moments. ACLi also showed lower contributions of biceps femoris to knee flexion, medial gastrocnemius to internal rotation, and varied hip muscle contributions to frontal plane hip moments. Between group differences in EMG–moment relationships during static conditions suggest neuromuscular contributions to sagittal plane stability increases after ACL injury, while knee stability during knee abduction and external rotation is reduced. Clinical Significance: Clinical assessments of ACLi should account for deficits in frontal and rotational plane stability by including tasks that elicit such loads. Improving hamstring muscle balance, hip abductor and gastrocnemius function may benefit ACLi rehabilitation interventions and should be studied further. © 2018 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res

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Reliability of knee joint muscle activity during weight bearing force control

Cited by 16 publications

References 52 publications

Intra-session and inter-session reliability of electromyography in leg extension during maximum voluntary isometric contractions of quadriceps: The effect of knee angle

Intra-session and inter-session reliability of electromyography in leg extension during maximum voluntary isometric contractions of quadriceps: The effect of knee angle

Sex‐related differences in neuromuscular control: Implications for injury mechanisms or healthy stabilisation strategies?

Differences in EMG–moment relationships between ACL‐injured and uninjured adults during a weight‐bearing multidirectional force control task

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