Sequencing of superficial trunk muscle activation during range-of-motion tasks

Schinkel-Ivy, Alison; Drake, Janessa D.M.

doi:10.1016/j.humov.2015.07.003

Cited by 8 publications

(5 citation statements)

References 39 publications

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“…After duplicates were removed, and following the screening of the titles and abstracts, a total of 18 articles remained for full-text examination. Three articles that investigated only healthy participants [ 47 – 49 ] and eight articles that did not use matrix decomposition methods [ 50 – 57 ] were excluded from the review. A total of seven articles fitted all inclusion and exclusion criteria, and were included in the analysis ( Fig 1 ).…”

Section: Resultsmentioning

confidence: 99%

The influence of musculoskeletal pain disorders on muscle synergies—A systematic review

2018

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BackgroundMusculoskeletal (MSK) pain disorders represent a group of highly prevalent and often disabling conditions. Investigating the structure of motor variability in response to pain may reveal novel motor impairment mechanisms that may lead to enhanced management of motor dysfunction associated with MSK pain disorders. This review aims to systematically synthesize the evidence on the influence of MSK pain disorders on muscle synergies.MethodsNine electronic databases were searched using Medical Subject Headings and keywords describing pain, electromyography and synergies. Relevant characteristics of included studies were extracted and assessed for generalizability and risk of bias. Due to the significant heterogeneity, a qualitative synthesis of the results was performed.ResultsThe search resulted in a total of 1312 hits, of which seven articles were deemed eligible. There was unclear consistency that pain reduced the number of muscle synergies. There were low consistencies of evidence that the synergy vector (W weights) and activation coefficient (C weights) differed in painful compared to asymptomatic conditions. There was a high consistency that muscle synergies were dissimilar between painful and asymptomatic conditions.ConclusionsMSK pain alters the structure of variability in muscle control, although its specific nature remains unclear. Greater consistency in muscle synergy analysis may be achieved with appropriate selection of muscles assessed and ensuring consistent achievement of motor task outcomes. Synergy analysis is a promising method to reveal novel understandings of altered motor control, which may facilitate the assessment and treatment of MSK pain disorders.

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Section: Resultsmentioning

confidence: 99%

The influence of musculoskeletal pain disorders on muscle synergies—A systematic review

2018

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“…With respect to golf, evidence suggests that excessive trunk lateral bending restricts trunk axial rotation velocity during the downswing, and axial rotation velocity is more important when aiming to maximise clubhead speed (Chu et al, 2010;Sato et al, 2013, Cole & Grimshaw, 2014. Increased muscle activation pattern variability has been shown in combined lateral bending and axial rotation trunk postures (Nairn & Drake, 2014;Schinkel-Ivy & Drake, 2015). By reducing trunk postures associated with lateral bending, the reduced muscle activation pattern variability assists in stiffening and stabilising the trunk more efficiently when undergoing movements specific to the golf swing (Schinkel-Ivy & Drake, 2015;Glofcheski & Brown, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…Increased muscle activation pattern variability has been shown in combined lateral bending and axial rotation trunk postures (Nairn & Drake, 2014;Schinkel-Ivy & Drake, 2015). By reducing trunk postures associated with lateral bending, the reduced muscle activation pattern variability assists in stiffening and stabilising the trunk more efficiently when undergoing movements specific to the golf swing (Schinkel-Ivy & Drake, 2015;Glofcheski & Brown, 2017).…”

Section: Discussionmentioning

confidence: 99%

“…It has been reported that excessive crunch-factor has the potential for injury in the vertebral body and facet joint of the lumbar spine (Gluck et al, 2007), as excessive trunk lateral bending restricts trunk axial rotation velocity during the downswing, and from a performance point of view, trunk axial rotation velocity is more important for skilled golfers aiming to maximise clubhead speed (Chu et al, 2010;Sato, Kenny & Dale, 2013). Combined segment postures during trunk movement have shown greater and more variable elecromyographic muscle activation patterns when undergoing trunk lateral bending and axial rotation, compared to that of trunk flexion and extension (Nairn & Drake, 2014; Schinkel-Ivy abdominal musculature to increase trunk stiffness and stability when undergoing movements specific to the golf swing is key for producing clubhead speed (Schinkel-Ivy & Drake, 2015;Glofcheski & Brown, 2017).…”

Section: Introductionmentioning

confidence: 99%

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The most important “factor” in producing clubhead speed in golf

Joyce

2017

Human Movement Science

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Substantial experiential research into x-factor, and to a lesser extent crunch-factor has been undertaken with the aim of increasing clubhead speed. However, a direct comparison of the golf swing kinematics associated with each 'factor' has not, and possible differences when using a driver compared to an iron. Fifteen low handicap male golfers who displayed a modern swing had their golf swing kinematic data measured when hitting their own driver and five-iron, using a 10-camera motion analysis system operating at 250Hz. Clubhead speed was collected using a validated launch monitor. No between-club differences in x-factor and crunch-factor existed. Correlation analyses revealed within-club segment (trunk and lower trunk) interaction was different for the driver, compared to the five-iron, and that a greater number of kinematic variables associated with x-factor, compared to crunch-factor were shown to be correlated with faster clubhead speeds. This was further explained in the five-iron regression model, where a significant amount of variance in clubhead speed was associated with increased lower trunk x-factor stretch, and reduced trunk lateral bending. Given that greens in regulation was shown to be the strongest correlated variable with PGA Tour earnings (1990-2004), the findings suggests a link to player performance for approach shots. These findings support other empiric research into the importance of x-factor as well as anecdotal evidence on how crunch-factor can negatively affect clubhead speed.

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“…In golf, the key to swing technique is to produce faster club head speeds [1,2]. Faster club head speed is a combination of limb speed and power, and the limbs tend to move from proximal to distal links in a sequence of acceleration and braking, resulting in great speed at the end of the link, and the use of the body's rotational mechanics to transfer this speed to the club to maximize power [3,4].…”

Section: Introductionmentioning

confidence: 99%

Technical Biomechanical Analysis of the Full Swing in Professional Male Golfers: A Wireless Biofeedback System

Zhang,

Wang,

et al. 2023

Preprint

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Background: Pro-golfers are increasingly trained scientifically, but swing technique characteristics have not yet been conclusively determined for golf performance. We investigated the relationship between the player's thorax, pelvis and club based on a wireless biofeedback system. We also determined whether thoracic and pelvic changes during different swing phases have different effects on ball striking. Methods: Eight male professionals performed 10 successful full-swing shots using a 5-iron and applied the K-vest wireless biofeedback system for analysis. Results: Peak angular velocities between the pelvis, torso, and clubs were all significantly different (p&lt;0.05) in the men's professional players. All players deviated more from the PGA players range metrics during the preparation stance. Excessive lateral pelvic bending angle, over-rotation, and hyperextension of the trunk were prevalent at the top of the backswing. Conclusions: Most players have an irrational sequence of pelvic, trunk and club rotation times, which is not conducive to improving club head speed and distance. Excessive pelvic rotation in the closed direction at the apex of the backswing is not conducive to maximizing the X-factor. At the moment of striking the ball, maintain a moderate forward trunk lean and full trunk rotation to avoid sports injuries.

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Sequencing of superficial trunk muscle activation during range-of-motion tasks

Cited by 8 publications

References 39 publications

The influence of musculoskeletal pain disorders on muscle synergies—A systematic review

The influence of musculoskeletal pain disorders on muscle synergies—A systematic review

The most important “factor” in producing clubhead speed in golf

Technical Biomechanical Analysis of the Full Swing in Professional Male Golfers: A Wireless Biofeedback System

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