Neuromuscular demand in a soccer match assessed by a continuous electromyographic recording

2017 ◽  
Vol 57 (4) ◽  
Author(s):  
Marco Montini ◽  
Francesco Felici ◽  
Andrea Nicolò ◽  
Massimo Sacchetti ◽  
Ilenia Bazzucchi
Keyword(s):  
Soccer Match ◽  
Electromyographic Recording

Democrazy—Dem Go Craze, O: Monitoring the 1999 Nigerian Elections

1999 ◽  
Vol 27 (1) ◽  
pp. 29-33
Author(s):  
Darren Kew
Keyword(s):  
Transition Program ◽  
The Political ◽  
High Stakes ◽  
Political Class ◽  
Soccer Match ◽  
The Public ◽  
The Military

In many respects, the least important part of the 1999 elections were the elections themselves. From the beginning of General Abdusalam Abubakar’s transition program in mid-1998, most Nigerians who were not part of the wealthy “political class” of elites—which is to say, most Nigerians— adopted their usual politically savvy perspective of siddon look (sit and look). They waited with cautious optimism to see what sort of new arrangement the military would allow the civilian politicians to struggle over, and what in turn the civilians would offer the public. No one had any illusions that anything but high-stakes bargaining within the military and the political class would determine the structures of power in the civilian government. Elections would influence this process to the extent that the crowd influences a soccer match.

Altered Knee Laxity and Stiffness in Response to a Soccer Match Simulation in Players Returning to Sport Within 12 Months After Anterior Cruciate Ligament Reconstruction

2021 ◽  
pp. 036354652110130
Author(s):  
Stefano Nuccio ◽  
Luciana Labanca ◽  
Jacopo Emanuele Rocchi ◽  
Pier Paolo Mariani ◽  
Paola Sbriccoli ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Cruciate Ligament ◽  
Return To Sport ◽  
Knee Laxity ◽  
Activity Level ◽  
Soccer Players ◽  
Control Group ◽  
Soccer Match ◽  
Anterior Cruciate ◽  
Anterior Knee

Background: The acute effects of exercise on anterior knee laxity (AKL) and anterior knee stiffness (AKS) have been documented in healthy participants, but only limited evidence has been provided for athletes cleared to return to sports after anterior cruciate ligament (ACL) reconstruction (ACLR). Purpose/Hypothesis: The purpose was to determine if 45 minutes of a soccer match simulation lead to acute changes in AKL and AKS in soccer players returning to sport within 12 months after ACLR. We hypothesized that the reconstructed knee of the ACLR group would exhibit an altered response to sport-specific exercise. Study Design: Controlled laboratory study. Methods: A total of 13 soccer players cleared to return to sport after ACLR and 13 healthy control soccer players matched for age, physical activity level, limb dominance, and anthropometric characteristics were recruited. To assess the effects of a standardized soccer match simulation (Soccer Aerobic Field Test [SAFT45]) on AKL and AKS, an arthrometric evaluation was carried out bilaterally before and immediately after SAFT45. To conduct a comprehensive examination of the force-displacement curve, the absolute and side-to-side difference (SSD) values of both AKL and AKS were extracted at 67, 134, and 200 N. Results: The ACLR and control groups showed similar AKL and AKS at baseline ( P > .05). In response to SAFT45, laxity increased bilaterally at all force levels by 14% to 17% only in the control group ( P < .025). Similarly, AKS at 134 and 200 N decreased in response to SAFT45 only in the control group (10.5% and 20.5%, respectively; P < .025). After SAFT45, the ACLR group had 1.9 and 2.5 times higher SSDs of AKS at 67 and 134 N compared with the control group, respectively ( P < .025), as well as a 1.9 times higher SSD of AKS at 134 N compared with baseline ( P = .014). Conclusion: Soccer players at the time of return to sport after ACLR showed an altered mechanical response to a sport-specific match simulation consisting of bilaterally unchanged AKL and AKS. Clinical Relevance: Soccer players showing altered AKL and AKS in response to exercise after ACLR may not be ready to sustain their preinjury levels of sport, thus potentially increasing the risk of second ACL injuries.

scholarly journals Salivary oxytocin, cognitive anxiety and self-confidence in pre-competition athletes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Irene La Fratta ◽  
Sara Franceschelli ◽  
Lorenza Speranza ◽  
Antonia Patruno ◽  
Carlo Michetti ◽  
...  
Keyword(s):  
Stress Response ◽  
State Anxiety ◽  
Young Male ◽  
Soccer Players ◽  
Soccer Match ◽  
Self Confidence ◽  
Cognitive Anxiety ◽  
Psychophysiological Stress ◽  
Different Levels

AbstractIt is well known that soccer sport has the potential for high levels of stress and anxiety and that these are linked to Cortisol (C) variations. To date, much research has been devoted to understanding how Oxytocin (OT) can affect anxiety in response to a challenge. The aim of this study was to investigate, in 56 young male soccer players, the psychophysiological stress response 96 and 24 h before one soccer match of a tournament, in order to establish whether athletes who won or lost, show different levels of C and OT or expressions of competitive state anxiety subcomponents. We found that winners had significantly lower Cognitive anxiety and higher Self-confidence scores than losers. Also, significant differences between winners and losers in C and OT concentrations were observed, with higher OT levels in who has won and higher C levels in who has lost. Our results showed interesting associations between OT, C, anxiety feelings, and the outcome of competition.

Democrazy—Dem Go Craze, O: Monitoring the 1999 Nigerian Elections

1999 ◽  
Vol 27 (1) ◽  
pp. 29-33
Author(s):  
Darren Kew
Keyword(s):  
Transition Program ◽  
The Political ◽  
High Stakes ◽  
Political Class ◽  
Soccer Match ◽  
The Public ◽  
The Military

In many respects, the least important part of the 1999 elections were the elections themselves. From the beginning of General Abdusalam Abubakar’s transition program in mid-1998, most Nigerians who were not part of the wealthy “political class” of elites—which is to say, most Nigerians— adopted their usual politically savvy perspective of siddon look (sit and look). They waited with cautious optimism to see what sort of new arrangement the military would allow the civilian politicians to struggle over, and what in turn the civilians would offer the public. No one had any illusions that anything but high-stakes bargaining within the military and the political class would determine the structures of power in the civilian government. Elections would influence this process to the extent that the crowd influences a soccer match.

The influence of playing surface on external demands and physiological responses during a soccer match simulation

2021 ◽  
pp. 1-9
Author(s):  
Daniel WT Wundersitz ◽  
Craig A. Staunton ◽  
Brett A. Gordon ◽  
Michael IC. Kingsley
Keyword(s):  
Physiological Responses ◽  
Soccer Match

Can compression stockings reduce the degree of soccer match-induced fatigue in females?

2018 ◽  
Vol 27 (3) ◽  
pp. 351-364 ◽  
Author(s):  
Larissa Neves Pavin ◽  
Anthony S. Leicht ◽  
Samuel Valencia Gimenes ◽  
Bruno Victor Corrêa da Silva ◽  
Mário Antônio de Moura Simim ◽  
...  
Keyword(s):  
Compression Stockings ◽  
Soccer Match

scholarly journals Biomechanical and Physiological Response to a Contemporary Soccer Match-Play Simulation

2015 ◽  
Vol 29 (10) ◽  
pp. 2860-2866 ◽  
Author(s):  
Richard M. Page ◽  
Kelly Marrin ◽  
Chris M. Brogden ◽  
Matt Greig
Keyword(s):  
Physiological Response ◽  
Match Play ◽  
Soccer Match

scholarly journals Interpretation of the Directional Properties of Voluntarily Modulated Human Ankle Mechanical Impedance

2010 ◽  
Author(s):  
Patrick Ho ◽  
Hyunglae Lee ◽  
Mohammad A. Rastgaar ◽  
Hermano Igo Krebs ◽  
Neville Hogan
Keyword(s):  
Muscle Activation ◽  
Mechanical Impedance ◽  
In Vivo Studies ◽  
General Representation ◽  
Quantitative Characterization ◽  
Ankle Impedance ◽  
Human Ankle ◽  
Electromyographic Recording

This article presents the results of two in-vivo studies providing measurements of human static ankle mechanical impedance. Accurate measurements of ankle impedance when muscles were voluntarily activated were obtained using a therapeutic robot, Anklebot, and an electromyographic recording system. Important features of ankle impedance, and their variation with muscle activity, are discussed, including magnitude, symmetry and directions of minimum and maximum impedance. Voluntary muscle activation has a significant impact on ankle impedance, increasing it by up to a factor of three in our experiments. Furthermore, significant asymmetries and deviations from a linear two-spring model are present in many subjects, indicating that ankle impedance has a complex and individually idiosyncratic structure. We propose the use of Fourier series as a general representation, providing both insight and a precise quantitative characterization of human static ankle impedance.

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