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https://www.readbyqxmd.com/read/29060643/analysis-of-one-repetition-during-biceps-curl-exercise-among-age-matched-adult-volunteers-using-endurance-curl-speed-and-surface-electromyography-signals
#1
Kiran Marri, Diptasree Maitra Ghosh, Ramakrishnan Swaminathan
Exercises under isometric and dynamic contractions are influenced by the rate coding and recruitment strategies. The study of muscle strength under dynamic contraction is normally performed using one-repetition maximum (1-RM) method. There are several variants of deriving one repetition method using number of repetitions and load that are useful in physical fitness and clinical rehabilitation program. However, the factors of dynamic contractions such as endurance time, speed of muscle contractions and muscle activity are not considered in 1-RM methods...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29058537/the-influence-of-an-acute-bout-of-whole-body-vibration-on-human-postural-control-responses
#2
Samuel J Wilson, Charles C Williams, Jacob R Gdovin, John D Eason, Lauren A Luginsland, Christopher M Hill, Harish Chander, Chip Wade, John C Garner
The use of vibrating platforms has become increasingly available, and popular at sports and rehabilitation institutes. Given the discrepancies in the literature regarding whole body vibration (WBV) and human reflexive responses, the purpose of this study was to examine the acute effects of WBV on postural response latencies, as well as associated electromyography measures of the lower extremities during balance perturbations. Reflexive responses during backward and forward balance perturbations were examined before, after, and 10 min after a bout of WBV...
October 23, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28944715/balance-training-enhances-motor-coordination-during-a-perturbed-side-step-cutting-task
#3
Anderson Souza Oliveira, Priscila de Brito Silva, Morten Enemark Lund, Dario Farina, Uwe Gustav Kersting
Study Design Controlled laboratory study. Background Balance training (BTR) may improve motor coordination, however little is known about the changes in motor coordination during unexpected perturbations to postural control following BTR. Objectives To study the effects of BTR on motor coordination and knee mechanics during perturbed side-step cutting maneuvers in healthy adults. Methods Twenty-six healthy men were randomly assigned to a training group (TG) or control (CG). Before BTR, subjects performed unperturbed, 90° side-step cutting maneuvers and one unexpected perturbed cut (10-cm translation of a moveable platform)...
September 23, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28915093/sport-skill-specific-expertise-biases-sensory-integration-for-spatial-referencing-and-postural-control
#4
Michalis Thalassinos, Giorgos Fotiadis, Fotini Arabatzi, Brice Isableu, Vassilia Hatzitaki
The authors asked how sport expertise modulates visual field dependence and sensory reweighting for controlling posture. Experienced soccer athletes, ballet dancers, and nonathletes performed (a) a Rod and Frame test and (b) a 100-s bipedal stance task during which vision and proprioception were successively or concurrently disrupted in 20-s blocks. Postural adaptation was assessed in the mean center of pressure displacement, root mean square of center of pressure velocity and ankle muscles integrated electromyography activity...
September 15, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28913369/changes-in-the-width-of-the-tibiofibular-syndesmosis-related-to-lower-extremity-joint-dynamics-and-neuromuscular-coordination-on-drop-landing-during-the-menstrual-cycle
#5
Michie Okazaki, Masaaki Kaneko, Yukisato Ishida, Norio Murase, Toshihito Katsumura
BACKGROUND: Many injuries of the lower extremities, especially the knee and ankle, occur during sports activity, and the incidence rate is higher in women than in men. HYPOTHESIS: The hypothesis was that phases of the menstrual cycle affect the width of the tibiofibular syndesmosis during drop landing in healthy young women and that such changes at the tibiofibular joint also affect the dynamics and neuromuscular coordination of the lower extremities. STUDY DESIGN: Descriptive laboratory study...
September 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28882467/muscle-activation-behavior-in-a-swimming-exergame-differences-by-experience-and-gaming-velocity
#6
Pooya Soltani, Pedro Figueiredo, Ricardo J Fernandes, João Paulo Vilas-Boas
The effects of playing intensity and prior exergame and sport experience on the activation patterns of upper limb muscles during a swimming exergame were investigated. Surface electromyography of Biceps Brachii, Triceps Brachii, Latissimus Dorsi, Upper Trapezius, and Erector Spinae of twenty participants was recorded, and the game play was divided into normal and fast. Mean muscle activation, normalized to maximum voluntary isometric contraction (MVIC), ranged from 4.9 to 95.2%MVIC and differed between normal and fast swimming for all techniques (p<0...
November 1, 2017: Physiology & Behavior
https://www.readbyqxmd.com/read/28802435/gait-characteristics-in-women-s-safety-shoes
#7
Kanako Goto, Kaoru Abe
Although workers in Japan are required to wear safety footwear, there is concern about occupational accidents that occur when wearing safety shoes. This study aimed to analyze the effect of wearing hardsoled safety shoes on both spatiotemporal gait characteristics and the muscle activity in the lower extremities. Seventeen young women participated in this study. A 5-m gait trial and a surface electromyography trial were conducted while the women walked in either safety shoes or sports shoes. Paired t-tests were performed to analyze the differences in gait characteristics when walking in the two different pairs of shoes...
November 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28705994/wearable-brain-imaging-with-multi-modal-physiological-recording
#8
Gary E Strangman, Vladimir Ivkovic, Quan Zhang
The brain is a central component of cognitive and physical human performance. Measures including functional brain activation, cerebral perfusion, cerebral oxygenation, evoked electrical responses, and resting hemodynamic and electrical activity are all related to, or can predict health status or performance decrements. However, measuring brain physiology typically requires large, stationary machines that are not suitable for mobile or self-monitoring. Moreover, when individuals are ambulatory, systemic physiological fluctuations-e...
July 13, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28704624/a-systematic-review-of-emg-studies-in-normal-shoulders-to-inform-postoperative-rehabilitation-following-rotator-cuff-repair
#9
Peter K Edwards, Jay R Ebert, Chris Littlewood, Tim Ackland, Allan Wang
Study Design Systematic review. Background Electromyography (EMG) has previously been used to guide postoperative rehabilitation progression following rotator cuff repair, to prevent deleterious loading of early surgical repair. Objective To review the current literature investigating EMG during rehabilitation exercises in normal shoulders, to identify exercises that meet a cut point of ≤15% maximal voluntary isometric contraction (MVIC) and unlikely to result in excessive loading in the early postoperative stages...
July 13, 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28670285/muscle-and-tendon-adaptation-in-adolescence-elite-volleyball-athletes-compared-to-untrained-boys-and-girls
#10
Falk Mersmann, Georgios Charcharis, Sebastian Bohm, Adamantios Arampatzis
Though the plasticity of human tendons is well explored in adults, it is still unknown how superimposed mechanical loading by means of athletic training affects the properties of tendons during maturation. Due to the increased responsiveness of muscle to mechanical loading, adolescence is an important phase to investigate the effects of training on the mechanical properties of tendons. Hence, in the present study we compared vastus lateralis (VL) architecture, muscle strength of the knee extensor muscles and patellar tendon mechanical properties of male and female adolescent elite athletes to untrained boys and girls...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28666403/cervical-myelopathy-in-a-patient-referred-for-lower-extremity-symptoms
#11
Steven M Jackson
The patient was a 38-year-old male referred to physical therapy with complaints of right lower extremity radicular pain and left lower extremity weakness. Following physical therapy examination, the primary care physician referred the patient to a neurologist, who performed electromyography and nerve conduction studies and ordered a magnetic resonance image. Cervical spine imaging revealed a C5-6 disc extrusion with myelopathy. J Orthop Sports Phys Ther 2017;47(7):510. doi:10.2519/jospt.2017.5071.
July 2017: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/28659467/motor-learning-in-a-complex-balance-task-and-associated-neuroplasticity-a-comparison-between-endurance-athletes-and-nonathletes
#12
Oliver Seidel, Daniel Carius, Rouven Kenville, Patrick Ragert
Studies suggested that motor expertise is associated with functional and structural brain alterations, which positively affect sensorimotor performance and learning capabilities. The purpose of the present study was to unravel differences in motor skill learning and associated functional neuroplasticity between endurance athletes (EA) and nonathletes (NA). For this purpose, participants had to perform a multimodal balance task (MBT) training on 2 sessions, which were separated by 1 wk. Before and after MBT training, a static balance task (SBT) had to be performed...
September 1, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28653780/gait-training-for-chronic-ankle-instability-improves-neuromechanics-during-walking
#13
Mark A Feger, Joseph M Hart, Susan Saliba, Mark F Abel, Jay Hertel
A novel gait-training device has been shown to improve gait patterns while patients with chronic ankle instability (CAI) are using the device and our current objective was to analyze the effect of structured gait training with the device on plantar pressure and surface electromyography (sEMG) following repeated gait training sessions. Sixteen CAI patients participated. Plantar pressure and sEMG were collected simultaneously during walking pre- and post-gait training. Plantar pressure (pressure time integral, peak pressure, time to peak pressure, contact area, contact time, and center of pressure trajectory) of the entire foot and nine specific regions of the foot were recorded concurrently with sEMG root mean square amplitudes from the anterior tibialis, peroneus longus, medial gastrocnemius, and gluteus medius...
June 27, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28513281/short-term-effects-of-kinesio-taping-on-muscle-recruitment-order-during-a-vertical-jump-a-pilot-study
#14
Guillermo Mendez-Rebolledo, Rodrigo Ramirez-Campillo, Eduardo Guzman-Muñoz, Valeska Gatica-Rojas, Alexis Dabanch-Santis, Francisco Diaz-Valenzuela
CONTEXT: Kinesio taping is commonly used in sports and rehabilitation settings with the aim of prevention and treatment of musculoskeletal injuries. However, limited evidence exists regarding the effects of 24 and 72 h of kinesio taping on trunk and lower limb neuromuscular and kinetic performance during a vertical jump. OBJECTIVE: The purpose of this study was to analyze the short-term effects of kinesio taping on the height and ground reaction force during a vertical jump, in addition to trunk and lower limb muscle latency and recruitment order...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28513268/effects-of-volume-training-on-strength-and-endurance-of-back-muscles-a-randomized-controlled-trial
#15
Leonardo Shigaki, Cynthia Gobbi Alves Araújo, Mariane Guizeline Calderon, Thais Karoline Cezar Costa, Andreo Fernando Aguiar, Leonardo Oliveira Pena Costa, Rubens A da Silva
CONTEXT: Strength/resistance training volume has historically been supported in the American College of Sports Medicine recommendations. However, for the back muscles, exercise prescription related to the number of sets, such as single vs. multiple, is not well established in the literature. OBJECTIVE: The purpose of this study was to compare the effects of two training volumes on strength and endurance of back extensor muscles in untrained young participants, with regard to a repeated measures design...
May 17, 2017: Journal of Sport Rehabilitation
https://www.readbyqxmd.com/read/28414741/effects-of-music-on-arousal-during-imagery-in-elite-shooters-a-pilot-study
#16
Garry Kuan, Tony Morris, Peter Terry
Beneficial effects of music on several performance-related aspects of sport have been reported, but the processes involved are not well understood. The purpose of the present study was to investigate effects of relaxing and arousing classical music on physiological indicators and subjective perceptions of arousal during imagery of a sport task. First, appropriate music excerpts were selected. Then, 12 skilled shooters performed shooting imagery while listening to the three preselected music excerpts in randomized order...
2017: PloS One
https://www.readbyqxmd.com/read/28350716/movement-strategies-among-groups-of-chronic-ankle-instability-coper-and-control
#17
S Jun Son, Hyunsoo Kim, Matthew K Seeley, J Ty Hopkins
INTRODUCTION: Comprehensive evaluation of movement strategies during functional movement is a difficult undertaking. Because of this challenge, studied movements have been oversimplified. Furthermore, evaluating movement strategies at only a discrete time point(s) provide limited insight into how movement strategies may change or adapt in chronic ankle instability (CAI) patients. This study aimed to identify abnormal movement strategies in individuals with a history of ankle sprain injury during a sports maneuver compared with healthy controls...
August 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28324999/surface-electromyography-based-muscle-fatigue-analysis-for-stroke-patients-at-different-brunnstrom-stages
#18
Yinjun Tu, Zhe Zhang, Xudong Gu, Qiang Fang
Muscle fatigue analysis has been an important topic in sport and rehabilitation medicine due to its role in muscle performance evaluation and pathology investigation. This paper proposes a surface electromyography (sEMG) based muscle fatigue analysis approach which was specifically designed for stroke rehabilitation applications. 14 stroke patients from 5 different Brunnstrom recovery stage groups were involved in the experiment and features including median frequency and mean power frequency were extracted from the collected sEMG samples for investigation...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28316262/tribute-to-dr-jacques-rogge-muscle-activity-and-fatigue-during-hiking-in-olympic-dinghy-sailing
#19
REVIEW
Jan G Bourgois, Jasmien Dumortier, Margot Callewaert, Bert Celie, Carlo Capelli, Gisela Sjøgaard, Dirk De Clercq, Jan Boone
'A tribute to Dr J. Rogge' aims to systematically review muscle activity and muscle fatigue during sustained submaximal quasi-isometric knee extension exercise (hiking) related to Olympic dinghy sailing as a tribute to Dr Rogge's merits in the world of sports. Dr Jacques Rogge is not only the former President of the International Olympic Committee, he was also an orthopaedic surgeon and a keen sailor, competing at three Olympic Games. In 1972, in fulfilment of the requirements for the degree of Master in Sports Medicine, he was the first who studied a sailors' muscle activity by means of invasive needle electromyography (EMG) during a specific sailing technique (hiking) on a self-constructed sailing ergometer...
June 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28269087/analyzing-the-influence-of-curl-speed-in-fatiguing-biceps-brachii-muscles-using-semg-signals-and-multifractal-detrended-moving-average-algorithm
#20
Kiran Marri, Ramakrishnan Swaminathan
In this work, an attempt has been made to analyze surface electromyography (sEMG) signals of fatiguing biceps brachii muscles at different curl speeds using multifractal detrended moving average (MFDMA) algorithm. For this purpose, signals are recorded from fifty eight healthy subjects while performing curl exercise at their comfortable speed until fatigue. The signals of first and last curls are considered as nonfatigue and fatigue conditions, respectively. Further, the number of curls performed by each subject and the endurance time is used for computing the normalized curl speed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
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