Examination of reactive motor responses to Achilles tendon vibrations during an inhibitory stepping reaction time task

Magnard, Justine; Cornu, Christophe; Berrut, Gilles; Deschamps, Thibault

doi:10.1016/j.humov.2017.10.018

Cited by 6 publications

(1 citation statement)

References 55 publications

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“…From the anatomical and physiological point of view, the gastrocnemius is rich in fast motor fibres, and would presumably be involved in the damping of vibrational stimuli with consequent loss of speed in reactive movements, and here is where compression stockings can play an integral part in not only assisting performance, but also decreasing the risk of injury. If we think of all sports where the effectiveness of action is linked to the ability to react quickly thus making the action unpredictable, [for example football, basketball, American football, rugby, and even in sports such as tennis] we realise what the value is, from a performance point of view, to reduce the movement of the calf thus keeping the athlete's reactive abilities unaltered and hence his unpredictability for the opponents [10].…”

Section: Introductionmentioning

confidence: 99%

"Preventative Aspects of Muscle Displacement in the Running Athlete"

Sergio¹

2021

BJSTR

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In respect to human movement, especially at high intensities, the body is subjected to vibratory phenomena that can have an influence in the aspects of prevention and performance. This is mainly due to the fact that the human body is endowed with good elasticity along with a good capacity for elastic reuse, unlike the hard and inelastic surfaces and structures with which it often comes in contact with. The impact or the meeting between two different structures from the point of view of both the elasticity and the ability to deform determines the vibrations that are transmitted on the more elastic structures in the form of waves with amplitude and frequency, forcing the latter to find a way to dampen them with the aim of reducing the "noise" in the system. An example of this is the runner who, by running on a more rigid surface, can experience vibrational forces up to 4-5 times his or her body weight, starting in the lower extremities, at each landing phase, and consequently increasing exponentially in those structures that are close to the contact areas. A negative consequence from this type of running can be seen visually with the discoloration in the calf musculature and is suggested that the increase of vibrations during impact with ground may be one of the causes of retrocalcaneal exostosis, or Haglund Syndrome.Haglund's deformity is an abnormality of the bone and soft tissues of the foot. An enlargement of the bony section of the heel [where the Achilles tendon is inserted] triggers this condition. The etiology is unknown, but other suggested causes than increase in vibrations during impact with the ground is a tight Achilles tendon, and or an accentuated arch of the foot. According to the latest research, women are more affected than men, and more often than not it is bilateral. Haglund syndrome is diagnosed with ultrasound and radiographic examination, pain on palpation, redness in the heel area, joint stiffness in the ankle. Treatment of Hanglund syndrome is often conservative, surgery is often not the best route. The use of specific orthoses, physiotherapy, a correct biomechanical evaluation can prevent this syndrome. This syndrome, as with other injuries incurred by runners due to increase vibrations during impact is the focus on this study.Eleven runners were tested on treadmills at submaximal speed, with footage taken on the calves at high speed [1000 frames per second] and their movements analysed during the landing or impact phase on the ground. The comparison was made between two graduated compression stockings, with one compression stocking having two silkscreened strips of silicone on the calf to stabilize the muscle. The latter socks data pointed to a 0.3 cm improvement in terms of calf movement reduction with the runners analysed [1,2].

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Section: Introductionmentioning

confidence: 99%

"Preventative Aspects of Muscle Displacement in the Running Athlete"

Sergio¹

2021

BJSTR

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The effect of mechanical vibration-based stimulation on dynamic balance control and gait characteristics in healthy young and older adults: A systematic review of cross-sectional study

et al. 2023

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Perceptual Inhibition Is Not a Specific Component of the Sensory Integration Process Necessary for a Rapid Voluntary Step Initiation in Healthy Older Adults

Magnard

Berrut

Couturier

et al. 2019

The Journals of Gerontology: Series B

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Objectives We investigated whether performing step initiation during a proprioceptive perturbation would require greater perceptual or motor inhibitory control in older adults. Method Fifty-two healthy adults (young: n = 26, mean age 22.5 years vs. older: n = 26, mean age 70.1 years) performed a stepping reaction time task, with different inhibition requirements (i.e., perceptual vs. motor inhibitory conflict), with two proprioceptive configurations: with and without application of Achilles tendon vibrations. Results Beyond a systematically greater stepping reaction time in older adults (p < .01), no difference was found between the perceptual versus motor inhibitory conflict resolution, regardless of age and proprioceptive configuration. Furthermore, slower reaction time was observed for young participants in the presence of Achilles tendon vibrations unlike older adults, who showed the same reactive stepping performance with or without vibrations (p < .05). Discussion These findings show that perceptual inhibition cannot be considered as specifically involved in the central processing of proprioceptive signals, at least not in active older adults. Rather than motor system malfunctioning or a reduced amount of proprioceptive afference, we propose that cortical-proprioceptive processing in older adults remains as effective as in young adults, regardless of the high attentional requirements for step responses.

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Examination of reactive motor responses to Achilles tendon vibrations during an inhibitory stepping reaction time task

Cited by 6 publications

References 55 publications

"Preventative Aspects of Muscle Displacement in the Running Athlete"

"Preventative Aspects of Muscle Displacement in the Running Athlete"

The effect of mechanical vibration-based stimulation on dynamic balance control and gait characteristics in healthy young and older adults: A systematic review of cross-sectional study

Perceptual Inhibition Is Not a Specific Component of the Sensory Integration Process Necessary for a Rapid Voluntary Step Initiation in Healthy Older Adults

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